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.