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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 15 (1931)

Issue: 5. (May)

First Page: 509

Last Page: 529

Title: Cap-Rock Petrography

Author(s): Levi S. Brown (2)


With a profusion of well cores available, the Freeport Sulphur Company undertook their utilization for further petrographic study during the summer of 1930. The following paper is a part of a report on that work, and records the minerals and rock structures observed in approximately one hundred and fifty thin sections. Conclusions seemingly substantiated by the study are (1) the sedimentary nature of the Previous HitanhydriteNext Hit, (2) its probable Glen Rose age, (3) alteration of the Previous HitanhydriteTop to form the calcite and gypsum caps, (4) further evidence of intrusive nature of salt stock and cap rock, and (5) primary origin of sulphur, in part.

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