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Title: Post-mortem surface features in larger foraminiferan Archaias angulatus as paleoenvironmental indicator

Abstract

Larger foraminifera are major contributors to sand-sized carbonate sediments. Archaias angulatus (Fichtel and Moll) is the dominant larger foraminiferan in the Caribbean region. A taphonomic study of this species revealed several stages of preservation from newly unaltered tests to complete destruction of outer calcite layers. Tests collected from contrasting environments in Key Largo, Florida, show different paths of degradation. Impact features and secondary growths predominate on tests collected from well-sorted sediments of the open platform, whereas dissolution features are most common on tests from the calm, muddy environment of Largo Sound. Tests from the open platform show major breakage, abundant scratches, and small, randomly spaced holes. Tests from Largo Sound show little breakage, few scratches, and loss of entire sections of the outer wall. Microborings are present on tests from both environments. This study shows that postmortem alterations of surface textures of larger foraminifera may be useful indicators of paleoenvironments of deposition.

Authors:
Publication Date:
Research Org.:
Univ. of South Florida, St. Petersburg
OSTI Identifier:
5378350
Report Number(s):
CONF-860624-
Journal ID: CODEN: AAPGB
Resource Type:
Conference
Journal Name:
Am. Assoc. Pet. Geol., Bull.; (United States)
Additional Journal Information:
Journal Volume: 70:5; Conference: American Association of Petroleum Geologists annual meeting, Atlanta, GA, USA, 15 Jun 1986
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; CARBONATE ROCKS; CORRELATIONS; DEPOSITION; FORAMINIFERA; STRATIGRAPHY; ANIMALS; GEOLOGY; INVERTEBRATES; MICROORGANISMS; PROTOZOA; ROCKS; SARCODINA; SEDIMENTARY ROCKS; 020200* - Petroleum- Reserves, Geology, & Exploration

Citation Formats

Cottey, T L. Post-mortem surface features in larger foraminiferan Archaias angulatus as paleoenvironmental indicator. United States: N. p., 1986. Web.
Cottey, T L. Post-mortem surface features in larger foraminiferan Archaias angulatus as paleoenvironmental indicator. United States.
Cottey, T L. 1986. "Post-mortem surface features in larger foraminiferan Archaias angulatus as paleoenvironmental indicator". United States.
@article{osti_5378350,
title = {Post-mortem surface features in larger foraminiferan Archaias angulatus as paleoenvironmental indicator},
author = {Cottey, T L},
abstractNote = {Larger foraminifera are major contributors to sand-sized carbonate sediments. Archaias angulatus (Fichtel and Moll) is the dominant larger foraminiferan in the Caribbean region. A taphonomic study of this species revealed several stages of preservation from newly unaltered tests to complete destruction of outer calcite layers. Tests collected from contrasting environments in Key Largo, Florida, show different paths of degradation. Impact features and secondary growths predominate on tests collected from well-sorted sediments of the open platform, whereas dissolution features are most common on tests from the calm, muddy environment of Largo Sound. Tests from the open platform show major breakage, abundant scratches, and small, randomly spaced holes. Tests from Largo Sound show little breakage, few scratches, and loss of entire sections of the outer wall. Microborings are present on tests from both environments. This study shows that postmortem alterations of surface textures of larger foraminifera may be useful indicators of paleoenvironments of deposition.},
doi = {},
url = {https://www.osti.gov/biblio/5378350}, journal = {Am. Assoc. Pet. Geol., Bull.; (United States)},
number = ,
volume = 70:5,
place = {United States},
year = {Thu May 01 00:00:00 EDT 1986},
month = {Thu May 01 00:00:00 EDT 1986}
}

Conference:
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