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The AAPG/Datapages Combined Publications Database
AAPG Bulletin
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Core samples taken from Texaco's Bishop A-1 well in the Elwood oil field in Santa Barbara County, California, penetrated 4,350 ft of section consisting of sediments of the lower Monterey Formation, the Rincon Shale, and the Vaqueros Sandstone. The two uppermost samples recorded at 558 and 561 ft contained Foraminifera indicating a Luisian age. The Relizian was represented by a thickness of about 700 ft. Approximately 1,500 ft of Saucesian age sediments were present. The upper Zemorrian was represented by 190 ft of section. The bottom 900 ft of preponderantly sandstones proved to be barren of Foraminifera. A foraminiferal faunule of late Zemorrian age, 138 ft below the Vaqueros/Rincon contact indicated an upper bathyal depth in this particular area, as opposed to much shal ower conditions, indicated elsewhere at the time of deposition of the Vaqueros Sandstone. Bathyal conditions persisted throughout the subsequent deposition of the Rincon Shale and lower Monterey Formation.
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