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Terrestrial-marine carbon cycle coupling in ??? 500-m.y.-old phosphatic brachiopods

Geology

By:
, , ,
DOI: 10.1130/G21434.1

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Abstract

Carbon isotope Compositions (??13C) of inarticulate brachiopod shells from Upper Cambrian sandstone in the cratonic interior of Laurentia record a 5??? positive excursion that correlates biostratigraphically with the global Steptoean positive isotopic carbon excursion. A consistent 6??? negative displacement in brachiopod ??13C relative to carbonate values is interpreted to represent an onshore-offshore gradient in the isotopic composition of dissolved inorganic carbon in Cambrian seawater. Thus, these ???500-m.y.-old chitinophosphatic brachiopod shells preserve evidence for carbon cycle coupling between the ancient atmospheric, oceanic, and terrestrial reservoirs in the time before embryophytic land plants. ?? 2005 Geological Society of America.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Terrestrial-marine carbon cycle coupling in ??? 500-m.y.-old phosphatic brachiopods
Series title:
Geology
DOI:
10.1130/G21434.1
Volume
33
Issue:
8
Year Published:
2005
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geology
First page:
661
Last page:
664
Number of Pages:
4