Photomicrographs - Fruitvale Field (5 photos)

Well: Fruitvale 1

FRAME 3-3. Chanac sandstone from Fruitvale field (Fruitvale 1, 3820'). Note well developed illitic? clay coats around detrital grains, primarily in right half of photo. Field of view 2.lmm. Crossed Nicols.

FRAME 3-3. Chanac sandstone from Fruitvale field (Fruitvale 1, 3820'). Note well developed illitic? clay coats around detrital grains, primarily in right half of photo. Field of view 2.lmm. Crossed Nicols.

FRAME 3-5. Chanac sandstone from Fruitvale field (Fruitvale 1, 4125'). Note abundant pyroxenes with blocky cleavage (yellow, green, and blue-green interference colors) in top center and lower left. Note also twinned plagioclase (upper right and center). Field of view 2.lmm. Crossed Nicols.

FRAME 3-6. Santa Margarita sandstone from Fruitvale field (Fruitvale 1 4455'). Note abundant calcite shell fragments (upper right, right margin, center), coarse biotite (lower right ) , and andesitic rock fragments. Carbonate in shells is not recrystallized. Field of view 2.lmm. Crossed Nicols.

Well: Shellabarger Sheldon 1

Frame 2-37. Chanac sandstone from Fruitvale field (Shellabarger 1 4531'). Note iron-stained car-bonate (siderite?) zones in center and right center of photo. Note also abundant twinned plagioclase and biotite flakes. Field of view 2.lmm. Crossed Nicols.