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GEOREF RECORD

A tale of two quarries; biologic and taphonomic signatures in the oxygen isotope composition of tooth enamel phosphate from modern and Miocene equids

J. Daniel Bryant, Philip N. Froelich, William J. Showers and Bernard J. Genna
A tale of two quarries; biologic and taphonomic signatures in the oxygen isotope composition of tooth enamel phosphate from modern and Miocene equids (in Skeletal records of ecologic change, Douglas S. Jones (editor))
Palaios (August 1996) 11 (4): 397-408

Abstract

The oxygen isotope composition of tooth enamel phosphate (delta (sub P) ) from cheek teeth in jaws of modern equids is compared with that of fossil equids from Thomson and Burge quarries (Miocene, Nebraska) to determine if paleobiologic and taphonomic signatures are preserved in the delta (sub P) of fossil teeth. Three distinct patterns of delta (sub P) variation are found in modern and fossil jaws. Each pattern can be related to the season of birth. An oxygen isotope mass balance model that incorporates seasonality and nursing of foals during tooth enamel mineralization is used to interpret the delta (sub P) pattern along the toothrow. The range of delta (sub P) for the same tooth position among "Merychippus" primus jaws from Thomson Quarry is relatively small (2.2 per mil), and the cheek tooth delta (sub P) pattern is similar among individual jaws. This is comparable to a modern living population and consistent with a taphonomic interpretation of catastrophic accumulation for the Thomson "M." primus population. The range of delta (sub P) for the same tooth position among Pseudhipparion retrusum jaws from Burge Quarry is larger (4 per mil), and the cheek tooth delta (sub P) patterns are not similar among individual jaws. This is consistent with an attritional accumulation over a long period of time. Such wide ranges in delta (sub P) limit application to continental paleoclimate reconstruction because of the low signal to noise ratio.


ISSN: 0883-1351
Serial Title: Palaios
Serial Volume: 11
Serial Issue: 4
Title: A tale of two quarries; biologic and taphonomic signatures in the oxygen isotope composition of tooth enamel phosphate from modern and Miocene equids
Title: Skeletal records of ecologic change
Affiliation: Princeton University, Department of Geological and Geophysical Sciences, Princeton, NJ, United States
Affiliation: University of Florida, Florida Museum of Natural History, Gainesville, FL, United States
Pages: 397-408
Published: 199608
Text Language: English
Publisher: Society of Economic Paleontologists and Mineralogists, Tulsa, OK, United States
References: 39
Accession Number: 1999-027799
Categories: Vertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, sketch map
N42°04'60" - N43°00'00", W102°04'60" - W100°10'00"
N42°00'00" - N43°00'00", W104°04'60" - W103°25'00"
Secondary Affiliation: Georgia Institute of Technology, USA, United StatesNorth Carolina State University, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by SEPM (Society for Sedimentary Geology), Tulsa, OK, United States
Update Code: 199910
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