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Late Paleozoic ice age; oceanic gateway or pCO (sub 2) ?

Matthew R. Saltzman
Late Paleozoic ice age; oceanic gateway or pCO (sub 2) ?
Geology (Boulder) (February 2003) 31 (2): 151-154


The cause of the late Paleozoic (ca. 355-255 Ma) ice age remains uncertain. A lowering of atmospheric carbon dioxide levels near the beginning of this time period occurred in response to the rise of land plants and likely cooled Earth, but the rapid growth of extensive Gondwanan ice sheets was delayed for tens of millions of years, until the Late Mississippian. The delta (super 13) C values from a thick succession at Arrow Canyon, Nevada, indicate a divergence between North America and Europe ( approximately 2 ppm) across the Mississippian-Pennsylvanian transition, and support a scenario in which the closure of a subequatorial oceanic gateway during the assembly of Pangea altered the oceanic distribution of nutrients ( (super 12) C) and led to enhanced poleward transport of heat and moisture. This change marks the transition from a cool, moisture-starved Gondwana to the icehouse world of the Pennsylvanian and Early Permian.

ISSN: 0091-7613
EISSN: 1943-2682
Serial Title: Geology (Boulder)
Serial Volume: 31
Serial Issue: 2
Title: Late Paleozoic ice age; oceanic gateway or pCO (sub 2) ?
Affiliation: Ohio State University, Department of Geological Sciences, Columbus, OH, United States
Pages: 151-154
Published: 200302
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 36
Accession Number: 2003-018501
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2003013
Illustration Description: illus. incl. geol. sketch map
N36°30'00" - N36°52'60", W115°15'00" - W114°30'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200306
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