Supplementary Data Log

UNOCAL CORPORATION
MCKITTRICK FRONT 415
SUPPLEMENTARY DATA LOG
(230' to 4790')

EPOCH WELL LOGGING, INC.

230'
SAND - clear, white, light blue-gray; medium to coarse, subangular to subrounded grains; noderately sorted; moderate to high sphericity; loose; noncemented; predominantly quartz; common lithics, trace feldspar; moderately iridescent oil sheen; no live oil pops; spotty strong gold sample fluorescence; fast milky yellow cut fluorescence with common streamers; spotty gold-brown visible stain; moderately heavy petroleum odor; probably depleted zone.

260'
CLAY - green-gray to medium blue-gray; firm; very thick pasty consistency; poor solubility; slightly gritty to increasingly smooth; very greasy; silty; good cohesion; abundantly firm, structureless claystone cuttings; increasing petroleum odor; very good iridescent oil sheen; moderately scattered fluorescent yellow-gold oil pops.

290'
SAND - clear, white, light gray; medium to very coarse, subangular to subrounded grains; poor to moderate sorting; moderate sphericity; loose; predominantly quartz; common feldspar and lithic grains; minor chloritic stains; abundant gold-brown sticky oil stains; good even gold sample fluorescence; fast streaming opaque green-yellow to yellow-orange cut fluorescence; straw to amber visible cut; marked increase in quality of heavy oil indicators.

320'
SAND - clear, white, yellow-brown; medium to very coarse, angular to subrounded grains; moderate to well sorted; moderate sphericity; loose; abundant clear to frosted quartz; common feldspar and lithic grains; excellent tarry oil stains on sand grains; strong even gold sample fluorescence; instant opaque yellow to yellow-orange cut fluorescence; strong yellow-orange to orange-brown residual cut fluorescence; strong iridescent oil sheen; strong petroleum odor; abundant live oil pops; dark amber to dark brown visible cut.

350'
SAND - as above except lOOX tarry oil coating and good oil scum at shaker screen.

380'
SAND - yellow-brown, light gray, clear and white; medium to very coarse, angular to subrounded grains; poorly sorted; moderate sphericity; loose; minor calcareous sandstone fragments; predominantly frosted quartz; common feldspar and lithic grains; occasional detrital chert fragments; oil as in previous samples.

410'
SAND - light yellow-brown, clear, white, marked decrease in grain size to fine to medium with occasional coarse grains; subangular to subrounded; moderate sorting; moderate to high sphericity; predominantly frosted quartz; abundant lithic grains; common feldspar; 80 - 100% sticky brown oil coating on all sand grains; good iridescent oil sheen; abundant live oil pops; strong even gold sample fluorescence; instant opaque yellow-brown to yellow-orange cut fluorescence; strong, opaque yellow-orange residual cut fluorescence; good oil scum at shaker; brown visible cut.

470'
DIATOMITE - medium to dark brown and dusky yellow-brown; soft; thick, pasty consistency; good to moderate solubility; gritty texture; punky; oil as in previous samples.

500'
SAND - clear to light yellow-brown; fine; subangular to subrounded grains; moderate to well sorted; moderate to high sphericity; loose; increased uniformity in grain size; predominantly quartz; trace pyrite and biotite; scattered to even, dark brown sticky oil stain; good iridescent oil sheen: strong even gold sample fluorescence; instant yellow-orange cut fluorescence; dark amber to brown visible cut; strong dark brown oil scum from blender; strong odor.

550'
SAND - clear, white, light yellow-brown; fine; subangular to subrounded grains; moderate to well sorted; increased uniformity of grain size; predominantly frosted quartz; trace biotite and pyrite; abundant dark brown oil blebs; strong gold sample fluorescence; fast streaming yellow-orange to greenish yellow-orange cut fluorescence.

600'
CLAY - medium gray to green-gray; slightly soft to stiff; thick pasty consistency; poor solubility; gritty texture; ; slightly greasy; abundant firm insoluble structureless claystone cuttings; poorly to moderately iridescent oil sheen; overall decrease in quality of sheen.

650'
DIATOMITE - dusky brown; soft; thick; moderate to good solubility; slightly gritty texture; punky; clayey; slightly sticky; marked increase in sand content; abundant oil pops; good gold-brown oil stain; strong even gold sample fluorescence; instant opaque greenish yellow-orange cut fluorescence; amber to dark brown visible cut.

680'
SAND - clear, brown, gray; fine to very coarse; angular to well rounded; poorly sorted; very low to moderate sphericity; unconsolidated; frosted to glassy quartz; feldspar, lithic fragments include very fine sandstone, porcelanite, trace shale; good odor; even gold sample fluorescence; fast yellow-white cut fluorescence; dark orange residual cut fluorescence; dark brown dry cut ring.

710'
CLAY - brown with gray to gray-green hues; soft; slimey nature; very lumpy in comparison to 680'
sample; moderately soluble; abundant large, firm, malleable to slightly plastic nodules with very poor solubility to insoluble; common fine to coarse included sand; fair petroleum odor; trace gold fluorescent pops; common dark brown heavy oil.

740'
SAND - clear, white, green, brown; fine to very coarse; trace porcelanite pebble size conglomerate fragments; angular to well rounded; poorly sorted; dominantly unconsolidated oil stained quartz with lessor amounts of feldspars, common light green porcelaneous claystone fragments; calcareous cemented sandstone; weak trace igneous rock fragments with muscovite; even to patchy yellow-orange sample fluorescence; fast yellow-white strong cut fluorescence; dull orange residual cut fluorescence.

770'
DIATOMITE - dark brown; oil saturated; soft to slightly firm; dominantly well rounded, grades from diatomaceous mudstone; structureless; punky texture; iridescent luster due to abundant oil; slightly to moderately calcareous; uniform dull yellow to yellow-orange sample fluorescence; instant bright yellow-white cut fluorescence.

830'
CLAY - green-gray to gray; thin to moderately thick and pasty consistency; soft, greasy, slightly gritty texture; improved solubility; poor cohesion; trace large firm to hard claystone nodules; reacts to cold acid; weak to fair petroleum odor; trace pale yellow-orange fluorescent pops; abundant brown free oil at shakers.

860'
SAND - clear, white, gray-green; fine to coarse, dominantly medium to coarse; very angular to well rounded; fair to poor sorting; dominantly sharp glassy quartz, coarse porcelaneous claystone, less frequent feldspars; trace reworked diatomite overall washed sample is very calcareous; uniform moderate yellow-orange sample fluorescence; instant strong cut fluorescence; yellow-orange residual cut fluorescence.

890'
DIATOMITE - light to medium brown, rarely dusky brown; very soft and soluble to firm and slightly brittle; rounded to infrequently subangular; smooth to punky texture when broken; oil saturated resulting in iridescent luster; slightly calcareous; moderate yellow-gold to yellow-orange sample fluorescence; very fast bright yellow-white cut fluorescence; moderate orange-yellow residual cut fluorescence; very dark brown visible cut and dry ring.

950'
SAND - clear, white, light gray; fine to coarse, slightly less conglomeritic; angular to well rounded; poor sorting; very low to moderate sphericity; unconsolidated quartz, porcelaneous claystone, less frequent white to gray feldspars; common mollusk fragments; overall sample shows moderate reaction to cold acld; even dull gold-orange sample fluorescence; fast streaming milky yellow cut fluorescence; bright yellow-orange residual cut fluorescence.

980'
SILTSTONE - light olive gray; soft to firm; structureless, rounded to subangular cuttings; slightly gritty texture; dull earthy luster; iridescent sheen on surfaces; slightly calcareous; trace very fine included quartz; patchy yellow-gold sample fluorescence; instant bright yellow cut fluorescence; dark amber visible cut.

1040'
CLAY - gray; slightly to moderately thick and pasty; greasy, lumpy texture; abrasive due to included sand; slightly calcareous; few small rounded malleable to brittle and chalky nodules; moderate odor; abundant brown oil pops in mud; good iridescent sheen on shakers.

1070'
DIATOMITE - dusky yellow-brown; soft, punky nature; structureless; soluble; overall very poorly indurated; iridescent luster due to oil saturation; strong odor; good iridescent sheen; dull orange-yellow sample fluorescence; fast, streaming to diffuse bright white cut fluorescence; moderate bright yellow-white residual cut fluorescence.

1160'
DIATOMITE - dusky yellow-brown; soft to very slightly firm; highly soluble; appears to have high porosity; punky to matte texture; iridescent to earthy luster; slightly calcareous; trace visible diatoms; patchy dull yellow-gold sample fluorescence; fast bright yellow-white cut fluorescence with frequent white streamers; yellow-orange residual cut fluorescence.

1250'
DIATOMACEOUS MUDSTONE - dark yellow-brown to dusky yellow-brown; soft; punky; slightly crunchy; low density; clay rich; structureless; streaming gold sample fluorescence; good iridescent sheen; instant yellow-orange cut fluorescence; amber to dark brown visible cut.

1280'
DIATOMITE - dusky brown; soft; slightly thick consistency; good solubility; gritty texture; punky; abundant mudstone; moderate iridescent oil sheen patchy live oil pops; moderate petroleum odor.

1310'
DIATOMACEOUS MUDSTONE - dusky yellow-brown to dark yellow-brown; soft to slightly firm; punky; small to medium, rounded cuttings; resinous to dull luster; slightly gritty texture; clay rich; structureless; no visible frustules; abundant dark gold-brown oil stain; good iridescent oil sheen; strong even gold sample fluorescence; instant to fast, streaming, green-yellow to greenish yellow-orange cut fluorescence; dark brown to amber visible cut; streaming opaque orange-gold to yellow residual cut fluorescence; moderate to strong petroleum odor.

1440'
LIMESTONE - white; very hard; sharp, angular, brittle fragments; strong pearly luster; smooth texture; forming drilling bones; strong effervescence; minor oil stained fracture surfaces; good iridescent sheen; even gold sample fluorescence; instant green-yellow to greenish yellow-orange cut fluorescence; strong yellow-orange residual cut fluorescence; dark amber visible cut.

1470'
DIATOMITE - dusky brown; soft; thick, pasty consistency; moderate to good solubility; gritty texture; spongy; punky; abundant clayey diatomaceous mudstone; com-on gold-brown heavy oil oozing up from sample; good iridescent oil sheen; lOOX gold fluorescence from unwashed sample; strong even gold sample fluorescence; instant greenish yellow-orange opaque cut fluorescence; streaming opaque yellow-orange residual cut fluorescence; moderate to strong petroleum odor; dark amber to brown visible cut.

1520'
DIATOMACEOUS MUDSTONE - dusky brown to dark yellow-brown; soft to slight increase in firmness; poor to moderate induration; slightly sparkling to dull luster; gritty texture; punky; slight decrease in clay content; structureless; abundant heavy oil stain and free oil; good iridescent oil sheen; patchy live oil pops; streaming even gold sample fluorescence; instant yellow-orange to greenish yellow-orange cut fluorescence.

1580'
PORCELANITE - dusky brown to medium brown; hard to very hard; very brittle; sharp, angular to subangular, elongate shards; strong resinous luster; smooth to finely abrasive texture; commonly having translucent edges; minor laminations; occasionally grading to dense chert; splintery to subconchoidal fracture; spotty yellow-gold sample fluorescence; instant to fast gray-yellow to yellow cut fluorescence; straw to amber visible cut; overall decrease in quality of oil.

1640'
ARGILLACEOUS CHERT - dark red-brown; very hard; well indurated; blocky cuttings with subconchoidal fracture; appears very fractured; trace slightly porcelaneous lamlnations; smooth to slightly grainy texture, rarely grading from siliceous shale; resinous luster; fair odor; common iridescent pops and free oil; patchy dull yellow-gold sample fluorescence; fast, streaming bright yellow cut fluorescence; brown visible cut; yellow-orange residual cut fluorescence.

1700'
PORCELANITE - gray-brown to red-brown; firm, dominantly splintery and very brittle; grades to chert; sharp, uneven cuttings; smooth to slightly grainy texture; resinous to glassy luster, translucent on edges; trace red-brown phosphatic blebs; patchy dull yellow-gold sample fluorescence; instant bright yellow-white cut fluorescence; dark amber visible cut.

1730'
SHALE - dusky brown; soft to hard; dominantly well indurated; softer cuttings grade occasionally to mudstone; poor to infrequently good fissility; occasional cherty microlaminations; rough, slightly arenaceous texture; resinous to dull luster; calcareous; spotty dull gold-yellow sample fluorescence; very fast, streaming yellow-white cut fluorescence; bright yellow-orange residual cut fluorescence.

1790'
ARGILLACEOUS CHERT - dark red-brown; hard to very hard; small to medium blocky cuttings; trace light brown shaly laminations; smooth to grainy texture, occasionally grades from porcelanite; resinous to slightly glassy luster; less frequent phosphatic blebs; trace dull yellow sample fluorescence; fast, streaming yellow-white cut fluorescence from bulk sample.

1850'
DOLOSTONE - moderate yellow-brown; hard; occurs as drilling bones; small to large, structureless fragments; occasional white portions reacting instantly to cold acid; sucrosic to trace mlcrocrystalline texture; sparkling to resinous luster; trace sulfides; common oil staining; mineral fluorescence from dolostone masks sample fluorescence; fast moderately strong bright yellow-white cut fluorescence from bulk sample; slow, diffuse milky yellow cut fluorescence from isolated cuttings.

1880'
SHALE - moderate to dusky brown, yellow-brown; slightly soft to hard; more commonly grading to mudstone; poor overall fissility; rough texture; resinous to earthy luster in less indurated cuttings; trace relict and preserved microfossils, probably forams; very weak, dull green-gold background oil fluorescence, possibly from recirculated mud; streaming yellow-white cut fluorescence, increased intensity with time; bright yellow-orange residual cut fluorescence.

1940'
PORCELANITE - dark brown-gray; slightly to very firm; impure; sharp, splintery cuttings with hackly fracture; slightly grainy to smooth texture; dull to resinous luster, occasionally glassy where more indurated; trace dull gold-yellow sample fluorescence; fast diffuse to streaming yellow-white cut fluorescence; less common oil staining.

1970'
CLAY - dark brown; moderately thick, stiff consistency; gummy, slightly abrasive texture; good solubllity; fair to good cohesion; sticky predominantly from included heavy oil; trace brittle, chalky poorly indurated claystone nodules; i'air petroleum odor; good iridescent sheen on unwashed sample; abundant brown oil in blender.

2030'
SHALE - dusky brown; hard to soft; incipient to rarely well defined fissility; trace cherty laminations; rough, silty texture; slightly calcareous; often grades to mudstone; dull to less frequently slightly resinous luster; persistent traces of white limey blebs, probably relict microfossils; uneven dull yellow-gold sample fluorescence; slow diffuse yellow to yellow-green cut fluorescence from isolated cuttings.

2090'
LIMESTONE - tan, white; firm to hard; massive, occasionally platy cuttings; micritic to grainy, domlnantly dolomitic; trace grading from marly clay; trace bulk inclusions; weak trace sulfides; very dull green-gold background fluorescence; abundant sticky oil on cuttings yielding fast streaming milky yellow cut fluorescence; light yellow-orange residual cut fluorescence.

2120'
SAND - trace amounts; clear, white; fine to coarse; very angular to rounded; poor sorting, high to low sphericity; primarily glassy to frosted loose quartz grains with no oil staining; trace feldspars; no distinct sample fluorescence; strong bright yellow-white cut fluorescence from bulk sample; good petroleum odor at ditch.

2180'
SHALE - dusky yellow-brown; hard to slightly firm, overall well indurated; poor to fair fissility, commonly grading to mudstone; slightly to moderately calcareous; rough, silty texture; dull earthy luster; trace foram relicts; trace to indistinct dull yellow-gold to gold-orange sample fluorescence; fast, streaming yellow-white cut fluorescence, probably contamination from above zone.

2270'
CLAY - dusky brown; firm, malleable nature; soft, lumpy texture; fair to very good solubility; moderate cohesion, slightly to noncalcareous; abundant small to large plastic rounded nodules grading to claystone and mudstone; fair odor; abundant free oil at ditch from above zone.

2330'
SHALE - dusky brown to moderate brown; firm to hard; platy to blocky appearance; poor to good fissility; trace light brown microlaminations; rough texture; occasionally appears fractured; dull earthy luster; calcareous; occasional abundant disseminated microfossil relicts; decreased odor and overall oil quality.

2360'
MUDSTONE - moderate to dusky brown; very soft to firm, occasionally malleable; slightly soluble; massive to very weakly fissile, grading to argillaceous shale; no visible laminations or inclusions; smooth to slightly gritty texture; dull earthy to slightly porcelaneous luster, in more indurated cuttings; trace dull yellow sample fluorescence; slow, milky yellow to yellow-white cut fluorescence; pale yellow-orange residual cut fluorescence.

2420'
ARGILLACEOUS CHERT - dark reddish brown; hard; grading from porcelanite; massive; subconchoidal fracture; smooth to slightly grainy texture; resinous luster; noncalcareous; trace black inclusions; very weak pale green-gold background fluorescence; milky yellow streaming cut fluorescence; light yellow-orange residual cut fluorescence.

2450'
SHALE - dusky yellow-brown; firm to very hard; dominantly moderate induration; poorly fissile overall with few cuttings exhibiting subparallel layers; rough, slightly abrasive texture; resinous luster; increasingly porcelaneous appearance; calcareous; very few visible foram casts and relicts; spotty dull yellow-gold sample fluorescence; translucent yellow-green cut fluorescence.

2510'
CLAY - dark brown; moderately thick and pasty consistenc slightly stiff; firm, malleable texture; fair to good solubility; slightly calcareous; lumpy due to chalky claystone nodules; good odor at ditch due to recirculated mud from above zone; oil in sample appears to be relatively low gravity.

2540'
DOLOSTONE - light yellow-brown; hard to very hard; medium sized, blocky cuttings with hackly appearance; no visible laminations; slightly sucrosic to rarely microcrystalline texture; sparkling to dull luster; yields dull yellow mineral fluorescence masking possible sample fluorescence; slow, yellow-green cut fluorescence with frequent milky yellow streamers; pale yellow-orange residual cut fluorescence.

2570'
CHERT - dark reddish brown; hard to very hard; grades from porcelanite and siliceous shale; irregularly shaped cuttings due to subconchoidal fracture; smooth slightly grainy texture in less indurated cuttings; resinous luster; spotty dull yellow-gold sample fluorescence; streaming pale yellow-white cut fluorescence; dull yellow-orange residual cut fluorescence; very pale straw visible cut.

2600'
CLAY - dusky brown; moderately thick, slightly stiff consistency; soft malleable, lumpy texture; good solubility overall with occasional medium rounded plastic very poorly soluble nodules commonly grading to claystone; noncalcareous; poor petroleum odor; still abundant llve oil pops in mud from above zone.

2630'
SHALE - dusky yellow-brown to olive black; very firm to hard; siliceous to argillaceous, occasionally grading from mudstone; generally poor fissility with few cuttings with good partings; silty texture; earthy to resinous luster; trace microfossil relicts; calcareous; weak trace dull yellow sample fluorescence; slow weak yellow-white cut fluorescence with few streamers; pale yellow-orange residual cut fluorescence.

2690'
CLAY - firm, soft nature; malleable, lumpy texture; slightly decreased solubility with increased claystone nodules; moderate cohesion; nonexpansive; slightly to non calcareous; poor odor; no fluorescent pops.

2720'
PORCELANITE - gray-brown to reddish brown; firm; brittle, occasional splintery cuttings; tabular to blocky cuttings; trace as laminations in shale; slightly grainy texture; dull to slightly resinous luster; occasional phosphatic blebs; spotty dull yellow-gold sample fluorescence; slightly increased speed and intensity of cut fluorescence; light yellow residual cut fluorescence.

2750'
SHALE - moderate to dusky yellow-brown; firm and friable to hard; poor to good fissility; trace light brown microlayering; rough, grainy texture; earthy luster; increased relict microfossil inclusions; occasional heavy oil staining on cuttings; patchy dull yellow-gold sample fluorescence; moderately bright yellow-white cut fluorescence with frequent milky white streamers; moderately bright chalky yellow-white residual cut fluorescence.

2780'
CLAY - dark brown; moderately thick consistency; slightly gummy, abrasive texture; easily soluble; fair cohesion; trace brittle claystone nodules; fair odor; no fluorescent pops; trace oil stain on washed cuttings.

2810'
SHALE - moderate to dark yellow-brown; firm to hard; moderate to occasionally well indurated; brittle; small to medium cuttings; slightly splintery in appearance; porcelaneous; moderate uneven fissility; silty; occasionally grades to mudstone; poor iridescent oil sheen; spotty gold-yellow sample fluorescence; fast streaming green-yellow cut fluorescence.

2870'
LIMESTONE - tan, pale yellow-brown and bone white; hard to very hard; microcrystalline; occasional silty laminations; trace vugs; minor spotty oil blebs on fracture surfaces; gold to yellow-gold sample fluorescence; fast streaming green-yellow cut fluorescence; straw to pale straw visible cut.

2900'
PORCELANITE - very pale yellow-orange to pale yellow-brown; firm to hard; moderate to well indurated; brittle to crunchy; minor laminations, calcareous in places; splintery fracture; grades to porcelaneous shale; poorly iridescent oil sheen; minor trace tarry oil stain on fracture surfaces; gold sample fluorescence; fast streaming green-yellow cut fluorescence; pale yellow residual cut fluorescence.

2960'
PORCELANITE - very pale yellow-orange to pale yellow-brown; firm to hard; brittle, crunchy; splintery fracture; grades to porcelaneous shale; slightly limey; common moderate gold-brown oil stain on fracture surfaces; spotty gold sample fluorescence; fast, streaming to diffuse green-yellow cut fluorescence; pale straw to straw visible cut.

2990'
SHALE - moderate brown to dusky yellow-brown; firm to hard; moderate to well indurated; brittle to slightly crunchy; small to medium, subangular to subrounded, tabular cuttings; slightly sparkling luster; abrasive to gritty texture; very porcelaneous; moderate to very calcareous; common dusky brown wavy laminations; poorly iridescent residual sheen; weak trace poor live pops; trace pale yellow sample fluorescence; moderately fast, streaming to increasingly diffuse green-yellow cut fluorescence; poor to moderate petroleum odor.

3050'
MUDSTONE - dusky brown to dark yellow-brown; slightly soft to firm; moderate induration; crunchy; occasionally punky; small to medium, subangular to rounded, tabular cuttings; dull to slightly sparkling luster; very rough gritty texture; poor flaky fissility; diatomaceous in appearance; slightly calcareous; minor calcareous inclusions; weak spotty sample fluorescence; lacking active oil pOp8; slightly fast, weakly streaming green-yellow cut fluorescence; light straw to clear visible cut.

3080'
SHALE - dusky brown to dark yellow-brown; firm to slightly hard; moderate induration; slightly porcelaneous in places; calcareous; grades to mudstone; moderate uneven fissility; indistinct yellow sample fluorescence; slightly fast, diefllSP to streaming, green-yellow cut fluorescence.

3110'
MUDSTONE - dusky brown to dark yellow-brown; soft to firm; generally structureless to occasionally exhibiting poor incipient shaly partings; slightly diatomaceous appearance; very calcareous; trace foram debris; lacking distinct oil pops; poorly iridescent residual oil sheen; weak spotty yellow sample fluorescence; slow to slightly fast green-yellow cut fluorescence.

3170'
SHALE - dusky brown to dark yellow-brown; firm, moderate induration; very small coffee ground size cuttings; strong resinous luster; smooth to slightly grainy texture; calcareous; minor thin wavy brown laminations; minor tarry oil blebs; show quality evaluation difficult due to persistent influx of heavy oil from previously penetrated 3200'
MUDSTONE - dusky yellow-brown to moderate brown; slightly soft to firm; crunchy; slightly resinous luster; calcareous; grainy texture; poor uneven fissility; grades to porcelaneous shale; poor oil indicators.

3230'
SHALE - dusky yellow-brown to brown; firm to slightly hard; moderate induration; very crunchy; slightly splintery fracture; slightly porcelaneous; calcareous; very weak trace gold-orange sample fluorescence; slow to slightly fast, diffuse to slightly streaming green-yellow cut fluorescence.

3290'
MUDSTONE - dusky yellow-brown to moderate brown; soft to firm, dominantly soft; small to medium, slightly crunchy to punky cuttings; dull to slightly sparkling luster; gritty to grainy texture; calcareous; pale yellow to yellow-orange sample fluorescence; slow to slightly fast green-yellow cut fluorescence; very light straw visible cut.

3320'
DOLOSTONE - pale yellow-brown; very hard, very well indurated; angular to subangular, blocky; occasionally more calcitic in parts; grades to dolomitic limestone; rough, hackly texture; slightly sucrosic, sparkling to dull luster; spotty dull yellow-gold sample fluorescence; moderately fast milky yellow-green cut fluorescence; straw visible cut.

3350'
PORCELANITE - light gray to gray-brown; firm, brittle; commonly very splintery; sharp, tabular to blocky with subconchoidal fracture; smooth to slightly grainy texture; dull to resinous luster; few phosphatic blebs; decreased oil quality.

3410'
SHALE - moderate to dusky yellow-brown; firm to very hard, grades occasionally to argillaceous chert and commonly to porcelanite, overall very siliceous; very good to incipient fissility; rough to smooth texture; dull to porcelaneous luster; patchy dull gold-yellow sample fluorescence; fast weak yellow-green cut fluorescence.

3440'
CLAY - dark brown; thin to slightly thick; occasionally stiff; predominantly derived from clayey shale/mudstone; good solubility; trace small claystone nodules; fair odor; abundant brown oil in recirculated mud.

3500'
ARGILLACEOUS CHERT - dark reddish brown; hard to very hard; dominantly well indurated; grades from porcelanite; no laminations; hackly appearance; resinous luster; noncalcareous; trace dull yellow-gold sample fluorescence; quality of cut fluorescence difficult to discern due to abundant free oil in recirculated mud.

3560'
LIMESTONE - tan; firm to very hard; dolomitic; rough, slightly sucrosic to smooth; microcrystalline; sparkling to earthy luster with more argillaceous; trace as thin laminations in shale.

3590'
PORCELANITE - moderate to light brown; hard; brittle, sharp, angular cuttings; slightly resinous luster; slightly abrasive texture; splintery fracture; minor calcareous inclusions; very argillaceous; weak petroleum odor; very poor iridescent residual oil sheen; pale yellow to green-yellow sample fluorescence; moderately fast diffuse green-yellow cut fluorescence; very pale visible cut.

3620'
SHALE - light brown to dark yellow-brown; firm to moderately hard; moderate to increasingly well indurated; brittle to slightly crunchy; resinous luster; slightly splintery fractures on porcelaneous fragments; trace laminations; minor calcareous inclusions (possible foram remnants); softer cuttings grading to mudstone; decreased abundance of sticky gold-brown oil blebs; very pale yellow to slightly greenish yellow sample fluorescence; moderately fast green-yellow cut fluorescence; moderately bright yellow residual cut fluorescence; very pale straw visible cut.

3680'
LIMESTONE - tan to very pale orange and bone white; hard; slightly brittle; sparkling luster; grainy texture; very argillaceous; grades to calcareous shale; weak trace vugs; minor trace gold-brown stain; pale yellow to orange-yellow sample fluorescence; moderately fast, streaming, translucent to weakly opaque green-yellow cut fluorescence; patchy moderately bright yellow residual cut fluorescence; very slow visible cut.

3710'
SHALE - moderate brown to dusky brown and yellow-brown; marked decrease in overall hardness; moderate induration; crunchy; slightly resinous luster; very rough, grainy texture; slight increase in apparent porosity; very calcareous; slightly diatomaceous appearance; moderate to good flaky fissility; difficult to denote oil pops due to persistent influx of heavy oil from previous interval; very pale indistinct orange-gold sample fluorescence; slightly fast, streaming to diffuse, translucent to slightly opaque white-yellow to greenish yellow residual cut fluorescence; very light straw to clear visible cut.

3740'
LIMESTONE - tan and very pale yellow-orange; hard; brittle; argillaceous to pure microcrystalline; trace vugs; slightly grainy to sucrosic texture; minor laminations; very pale indistinct orange-gold sample fluorescence; slighty fast, streaming to diffuse, translucent to slightly opaque white-yellow to greenish yellow cut fluorescence; patchy moderately bright yellow residual cut fluorescence; very light straw to clear visible cut.

3770'
SHALE - moderate brown to dusky brown and yellow-brown; slightly soft to firm; moderate induration; crunchy; slightly punky; slightly resinous to sparkling luster; gritty to grainy texture; starting to grade to mudstone; calcareous; pale yellow sample fluorescence; moderately fast; green-yellow cut fluorescence; pale to moderately bright yellow residual cut fluorescence.

3800'
MUDSTONE - dusky brown to yellow-brown; slightly soft to firm; occasionally hard; very crunchy; slightly punky; small to medium, subrounded, tabular cuttings; dull to slightly resinous luster; grainy texture; slightly diatomaceous in appearance; grades to shale; decrease in occurrence of limestone; calcareous; minor outgassing; very pale orange-gold sample fluorescence; slow to slightly fast, diffuse to weakly straming green-yellow to white-yellow cut fluorescence; very pale straw to clear visible cut.

3890'
SHALE - dusky yellow-brown; firm to very hard, well indurated; tabular to blocky cuttings; poor to infrequently fair fissility; no visible laminations; rough, silty texture; resinous to dull luster; calcareous; traces of relict forams and weak trace sulfides; spotty dull yellow-orange sample fluorescence; moderately fast streaming transluscent yellow to yellow-green cut fluorescence; light yellow-orange residual cut fluorescence; pale straw visible cut; very weak odor.

3970'
SHALE - gray-orange, medium brown and dusky yellow-brown; firm to hard; moderate to well indurated; medium, subangular to subrounded, tabular cuttings; slightly resinous luster; grainy texture; slight increase in occurrence of softer mudstone fragments; calcareous; foram debris; indistinct orange-gold sample fluorescence; slow to infrequently fast, diffuse to streaming green-yellow cut fluorescence; very pale yellow residual cut fluorescence; no live oil pops; residual oil sheen; weak petroleum odor.

4030'
LIMESTONE - very pale yellow-orange to gray-orange; very hard; sharp, angular, brittle cuttings; grainy texture; sparkling to slightly pearly luster; generally impure and silty; minor vugs; grades to well laminated calcareous shale; dolomitic in places; very pale orange-gold sample fluorescence; slow to slightly fast, diffuse to weakly streaming green-yellow cut fluorescence.

4060'
MUDSTONE - light brown to dusky yellow-brown; slightly soft to hard; predominantly firm; moderately indurated; crunchy to slightly punky; small to medium, subrounded cuttings; resinous luster, grainy texture; common wavy calcareous laminations; trace foram debris; occasionally having diatomaceous appearance; common limestone streaks; moderately bright yellow-gold mineral fluorescence; indistinct yellow-orange sample fluorescence; slow, diffuse to weakly streaming translucent green-yellow cut fluorescence; pale yellow residual cut fluorescence; clear visible cut.

4120'
SHALE - light brown to dusky yellow-brown; firm; moderately indurated; crunchy; slightly brittle; common wavy laminations; calcareous; common foram debris; pale yellow sample fluorescence; slow diffuse green-yellow cut fluorescence.

4160'
MUDSTONE - moderate to dusky brown; soft to firm, grades to argillaceous shale; smooth to slightly gritty texture; dull earthy to resinous luster where slightly porcelaneous; slightly to noncalcareous; trace microfossil casts; spotty moderate yellow-orange mineral fluorescence from dolomitic limestone; trace dull yellow-gold sample fluorescence; moderately fast, streaming to diffuse weak yellow-green cut fluorescence; light yellow-orange residual cut fluorPscence; pale straw visible cut; weak trace heavy oil stain on more siliceous shale.

4190'
SHALE - moderate yellow-brown to dusky brown; soft to firm, occasional hard fragments; crunchy to slightly punky; small to predominantly medium, subrounded, tabular cuttings; dull to slightly sparkling luster; grainy texture; very clay rich; abundant foram debris; very calcareous; moderate to good uneven slightly flaky fissility; commonly grades to mudstone; minor trace limestone cuttings; lacking distinct petroleum odor, stain, or pops; indistinct pale yellow sample fluorescence; slow to slightly fast, weakly streaming to diffuse, translucent green-yellow cut fluorescence; pale yellow residual cut fluorescence.

4250'
MUDSTONE - moderate yellow-brown to dark yellow-orange; soft to firm; slightly crunchy to occasionally punky; dull to slightly resinous luster; grainy texture; grades to increasingly hard shale; common tan and dark brown laminations; very calcareous; trace marl; weak indistinct yellow sample fluorescence; slow, diffuse green-yellow cut fluorescence; pale yellow residual cut fluorescence; clear visible cut.

4310'
SHALE - moderate to dusky yellow-brown; soft to very firm; dominantly fair induration; moderate to poor fissility, more often grading to rounded, structureless mudstone; rough, slightly arenaceous to rarely smooth texture; earthy to infrequently porcelaneous appearance; moderate to highly calcareous; trace to scattered relict forams; trace phosphatic inclusions, probably fish scales; no distinct petroleum odor, no pops; weak iridescent sheen in mud; trace dull yellow sample fluorescence; moderately fast, diffuse, translucent yellow-green cut fluorescence; pale yellow residual cut fluorescence.

4340'
LIMESTONE - white, light yellow-brown; dolomitic; firm to hard; subangular to well rounded where less indurated; massive; occasionally has hackly appearance; slightly sucrosic to micritic; sparkling to dull luster; trace grading from marly clay; weak odor; trace dull yellow sample fluorescence; slow, diffuse, transparent yellow-green cut fluorescence with occasional whlte streamers; pale yellow residual cut fluorescence.

4370'
MUDSTONE - moderate brown; very soft and soluble to firm; well rounded to subangular; dominantly sticky; massive to very poor fissility; smooth to slightly gritty texture; earthy luster; highly calcareous; scattered phosphates; weak trace foram casts; weak trace dull yellow sample fluorescence; slightly increased speed and intensity of yellow-green cut fluorescence; clear visible cut.

4400'
MUDSTONE - dusky brown to dusky yellow-brown; slightly soft to predominantly firm; slightly crunchy; small to medium, subrounded, tabular to slightly platy cuttings; slightly resinous luster; gritty to grainy texture; occasional punky appearance; grade to poor to moderately fissile shale; very calcareous; increased abundance of well preserved foram tests; frequent small, brittle, sharp, angular, light brown limestone fragments; minor trace marl; weak to indistinct petroleum odor; pale yellow to yellow-orange sample fluorescence; slow, diffuse, translucent green-yellow cut fluorescence; very pale yellow residual cut fluorescence; clear visible cut.

4460'
LIMESTONE - light brown, tan, occasionally bone white; hard to very hard; small to occasionally medium, sharp, angular to subangular, brittle cuttings; slightly resinous luster; slightly sucrosic to grainy texture; ranging from slightly microcrystalline to very impure and argillaceous; minor trace vugs; persistent trace whole foram tests; very pale, slightly spotty, yellow sample fluorescence; slow, diffuse to infrequently streaming green-yellow cut fluorescence; very pale yellow residual cut fluorescence; clear visible cut; persistent poorly iridescent residual oil sheen.

4490'
SHALE - dusky brown to dark yellow-brown; firm to slightly hard; moderate induration; small to medium, subangular to subrounded, tabular cuttings; slightly resinous to sparkling luster; gritty to grainy texture; grading to mudstone; calcareous; decrease in abundance of foram tests; moderate, uneven, flaky fissility; common foram hash; pale yellow sample fluorescence; slow, diffuse, translucent green-yellow sample fluorescence; very pale yellow residual cut fluorescence; persistent poorly iridescent residual oil sheen; clear visible cut.

4550'
SHALE - becoming very dark brown to dusky brown; firm; moderate induration; overall decrease in sample hardness; medium subrounded to rounded, tabular cuttings; slightly sparkling to resinous luster; very grainy texture; slightly punky appearance; moderate uneven flaky fissility; less calcareous; minor trace porcelanite to porcelaneous shale fragments; slight increase in apparent porosity; persistent trace limestone; indistinct trace pale yellow to gold-yellow sample fluorescence; very slow, diffuse translucent green-yellow cut fluorescence.

4580'
MUDSTONE - moderate to dark brown; slightly soft to firm; moderately indurated; grades to poorly fissile shale; calcareous; minor trace whole foram tests; common foram hash; very silty; grainy texture; very pale yellow to yellow-orange sample fluorescence; slow, diffuse, green-yellow cut fluorescence; very pale yellow residual cut fluorescence; clear visible cut.

4640'
CLAY - moderate to dark brown; slightly soft to stiff; thick pasty consistency; moderate to good solubility; slightly sticky; slightly punky feel; silty; very weakly calcareous; persistent poorly iridescent residual sheen; weak to indistinct petroleun odor; clear visible cut; no live oil pops .

4670'
MICRITE - white; very soft to slightly firm; slightly soluble; well rounded cuttings grading from marly clay nodules; structureless; smooth texture; dull luster; common microfossil inclusions, instantly reacts to acid; yields bright yellow mineral fluorescence, masking possible sample fluorescence; slow, diffuse, transparent, green-yellow cut fluorescence; pale yellow residual cut fluorescence.

4700'
SHALE - dusky brown to gray-brown; soft to very hard; predominantly moderately well indurated; blocky to less frequently platy cuttings; very poor overall fissility; occasional very thin more porcelaneous laminations; slightly arenaceous texture; earthy to porcelaneous luster; slightly to very calcareous; trace calcite healings; trace phosphatic blebs; trace dull orangish yellow sample fluorescence; increased intensity of yellow-green cut fluorescence.

4730'
DOLOSTONE - trace amounts; light yellow-brown; hard, blocky appearance; massive; sucrosic to rarely microcrystalline; sparkling to dull luster; occasionally grades to dolomitic limestone; disseminated sulfide inclusions throughout; weak trace dull yellow-orange sample fluorescence; slow green-yellow cut fluorescence; light yellow residual cut fluorescence.

4790'
MUDSTONE - moderate brown, gray-brown; soft to firm; rounded to subangular; generally slightly sticky and poorly soluble; infrequently grades to poorly fissile shale; smooth to slightly gritty texture; earthy luster; calcareous; occasional phosphates; mineral fluorescence from marl masks sample fluorescence; streaming yellow-green cut fluorescence, moderately strong with time; clear visible cut.