OXYGEN ISOTOPIC COMPOSITION OF BIOGENIC PHOSPHATE AND THE TEMPERATURE OF EARLY ORDOVICIAN SEAWATER

Stable isotopic values were measured on micrite, sparry calcite, dolomite, inarticulated brachiopods, and conodonts from the Lange Ranch section (central Texas) of the Lower Ordovician Tanyard Formation. The section spans the upper Cordylodus angulatus Zone through the lower Rossodus manitouensis Zo...

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Bibliographic Details
Published in:Palaios 2007-01, Vol.22 (1), p.98-103
Main Authors: BASSETT, DAMON, MACLEOD, KENNETH G, MILLER, JAMES F, ETHINGTON, RAYMOND L
Format: Article
Language:English
Subjects:
Apatites
Brachiopoda
C-13/C-12
Calcite
carbon
carbonate rocks
Carbonates
Conodonta
diagenesis
dolomite
Early Ordovician epoch
Geochemistry
Geology
Gillespie County Texas
histograms
Inarticulata
Invertebrata
isotope ratios
isotopes
limestone
lithostratigraphy
Long Ranch
Lower Ordovician
marine environment
micrite
microfossils
O-18/O-16
Ordovician
Oxygen
paleo-oceanography
Paleoclimatology
paleoenvironment
paleogeography
paleotemperature
Paleozoic
Phosphates
Ranches
Sea water
sedimentary rocks
stable isotopes
statistical analysis
Stratigraphy
Tanyard Formation
Texas
tropical environment
United States
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Summary:Stable isotopic values were measured on micrite, sparry calcite, dolomite, inarticulated brachiopods, and conodonts from the Lange Ranch section (central Texas) of the Lower Ordovician Tanyard Formation. The section spans the upper Cordylodus angulatus Zone through the lower Rossodus manitouensis Zone. An ∼2‰ negative δ13C shift from >0‰ to
ISSN:0883-1351
1938-5323
DOI:10.2110/palo.2005.p05-089r