Geological Society of America

182 D44. Karst Landforms and Processes (Posters)

Tuesday, 6 November 2018
9:00 AM - 6:30 PM
Halls J-K

PETROGRAPHIC ANALYSIS OF THE LIMESTONE OF THE PRIMEVAL FOREST NATIONAL PARK ON NEW PROVIDENCE, THE BAHAMAS

Paper number: 182-5
Program: Technical Sessions
Time: 9:00 AM – 6:30 PM

Authors

Kelsey L. Mills Presenting Author
Fort Hays State University, Hays, KS
Jonathan B. Sumrall
Fort Hays State University, Hays, KS
Jeanne Sumrall
Fort Hays State University, Hays, KS
John E. Mylroie
Mississippi State University, Mississippi State, MS
Joan R. Mylroie
Mississippi State University, Mississippi State, MS
Patricia N. Kambesis
Western Kentucky University, Bowling Green, KY

Abstract

The Primeval Forest is a Bahamian National Park located on New Providence Island, The Bahamas. Samples collected on previous research trips were used to create petrographic thin sections for depositional environment determination. It was hypothesized that the lithology of these rocks was from the Late Pleistocene Cockburn Town Member of the Grotto Beach formation. This hypothesis was based on the field observations of sub-tidal indicators of herringbone cross bedding and the presence of trace fossils Ophiomorpha sp. and Conichnus conicus. Petrographic analysis consisted of 100- to 300-point counts of dominant allochems, porosity, and matrix/cement content. These data were consistent with previous field observations, specifically indicating a quiet lagoonal/low subtidal/beach environment. The petrographic confirmation of depositional environment was specifically based on the presence of pellets/pelloids, intraclasts, and micrite-to-sparite percentages.

Geological Society of America Abstracts with Programs. Vol. 50, No. 6

doi: 10.1130/abs/2018AM-324630

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