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Silurian delta (super 13) C stratigraphy; a view from North America

Matthew R. Saltzman
Silurian delta (super 13) C stratigraphy; a view from North America
Geology (Boulder) (August 2001) 29 (8): 671-674


Three positive shifts in delta (super 13) C are recognized in well-dated carbonate successions in North America and can be confidently correlated with shifts in the Baltic region by using conodont and graptolite zonations. The delta (super 13) C excursions reach distinct peaks of +3 ppm to +4 ppm at the ends of the amorphognathoides and siluricus conodont zones and within the ludensis graptolite zone. The three events are associated with the most significant extinction horizons in the Silurian and occur near clastic-carbonate transitions that mark eustatic or oceanographic changes. The magnitudes of the two oldest delta (super 13) C peaks compare well with the Baltic region; however, the end-siluricus excursion reaches far greater values of as much as +11 ppm in Sweden, likely reflecting local modification of the global seawater signature.

ISSN: 0091-7613
EISSN: 1943-2682
Serial Title: Geology (Boulder)
Serial Volume: 29
Serial Issue: 8
Title: Silurian delta (super 13) C stratigraphy; a view from North America
Affiliation: Ohio State University, Department of Geological Sciences, Columbus, OH, United States
Pages: 671-674
Published: 200108
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 26
Accession Number: 2001-076326
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2001081
Illustration Description: illus. incl. strat. cols., sketch map
N34°00'00" - N34°30'00", W97°30'00" - W96°45'00"
N29°00'00" - N43°30'00", W122°00'00" - W102°30'00"
N35°00'00" - N42°00'00", W120°00'00" - W114°04'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200124
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