Geological Society of America

T158 Life's Innovations from the Early Earth to the Search on Modern Mars: Honoring the Career of Andrew H. Knoll (Posters)

Tuesday, 12 October 2021
9:00 AM - 1:00 PM
Exhibit Hall A

MODERN MICROBIAL MAT TAPHONOMY AND ITS IMPLICATIONS ON MICROFOSSIL PRESERVATION

Paper number: T158-4
Program: Technical Sessions
Time: 9:00 AM – 1:00 PM

Authors

Ashley Manning-Berg Presenting Author
The University of Tennessee at Chattanooga, Chattanooga, TN
Elizabeth Kathleen Lam
The University of Tennessee at Chattanooga, Chattanooga, TN
Leigh Anne Riedman
University of California, Santa Barbara, Santa Barbara, CA
Maya Gomes
Johns Hopkins University, Baltimore, MD

Abstract

Information stored within the microbial fossil record is readily altered by taphonomic processes that can occur prior to preservation, specifically biological decomposition. Although these taphonomic changes obscure the interpretation of ancient microbial ecosystems, actualistic taphonomy experiments provide insight into what information is lost during biological decomposition and have recently been used to identify decomposition patterns. The resulting decomposition pathways can be observed in ancient microbial mat environments. Actualistic experiments have been limited to lab-grown monocultures, and therefore cannot be used to describe the entire ecosystem. Here we present a taphonomic analysis of a modern microbial mat from Little Ambergris Cay, Turks and Caicos Island to establish the “starting taphonomy” of a mat ecosystem. This study was performed on images of the various layers of the microbial mat. We also focused primarily on the filamentous and coccoidal microorganisms observed in the mat as they are easiest to compare to previous actualistic experiments.

Geological Society of America Abstracts with Programs. Vol. 53, No. 6

doi: 10.1130/abs/2021AM-371005

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