Quantitative estimates of time-averaging in terebratulid brachiopod shell accumulations from a modern tropical shelf

Quantitative estimates of time-averaging in marine shell accumulations available to date are limited primarily to aragonitic mollusk shells. We assessed time-averaging in Holocene assemblages of calcitic brachiopod shells by direct dating of individual specimens of the terebratulid brachiopod Boucha...

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Bibliographic Details
Published in:Paleobiology 2003, Vol.29 (3), p.381-402
Main Authors: Carroll, Monica, Kowalewski, Michał, Simões, Marcello G, Goodfriend, Glenn A
Format: Article
Language:English
Subjects:
absolute age
Age distribution
Age structure
Amino acids
Articulata
assemblages
Bouchardia rosea
Brachiopoda
Brazil
C-14
carbon
Cenozoic
Fossils
geochronology
Geology
Holocene
Invertebrata
invertebrate
isotopes
modern analogs
Mollusks
organic acids
organic compounds
Paleontology
Paleozoic
Quaternary
racemization
radioactive isotopes
Radiocarbon
Radiocarbon dating
s
Sao Paulo Brazil
South America
Specimens
statistical analysis
Taphonomy
Terebratulida
Ubatuba Bay
upper Holocene
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Summary:Quantitative estimates of time-averaging in marine shell accumulations available to date are limited primarily to aragonitic mollusk shells. We assessed time-averaging in Holocene assemblages of calcitic brachiopod shells by direct dating of individual specimens of the terebratulid brachiopod Bouchardia rosea. The data were collected from exceptional (brachiopod-rich) shell assemblages, occurring surficially on a tropical mixed carbonate-siliciclastic shelf (the Southeast Brazilian Bight, SW Atlantic), a setting that provides a good climatic and environmental analog for many Paleozoic brachiopod shell beds of North America and Europe. A total of 82 individual brachiopod shells, collected from four shallow (5–25 m) nearshore (
ISSN:0094-8373
1938-5331
DOI:10.1666/0094-8373(2003)029<0381:QEOTIT>2.0.CO;2