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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 52 (1968)

Issue: 11. (November)

First Page: 2242

Last Page: 2246

Title: Late Tertiary History of Gulf of Mexico Based on a Core from Sigsbee Knolls: GEOLOGICAL NOTES

Author(s): Thomas E. Pyle (2)

Abstract:

Studies of the Foraminifera and calcareous nannoplankton in a core from the Sigsbee Knolls provide information pertinent to the history of the Gulf of Mexico basin. The sediments in this core are of late Miocene, Pliocene, and probable Pleistocene ages and are estimated to have accumulated at a rate less than 1 mm per 1,000 years. Benthonic foraminiferal depth ranges and sedimentologic criteria indicate that these sediments were deposited in deep water on a preexisting topographic high, that one of the diapiric structures known as the Sigsbee Knolls stood above the surrounding abyssal plain as long ago as the late Miocene, and that the central Gulf of Mexico has been a deep basin since at least that time.

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