Late Permian global coal hiatus linked to super 13 C-depleted C0 sub 2 flux into the atmosphere during the final consolidation of Pangea: comment and reply
Article Abstract:
Kevin Faure, Maarten J. de Wit, and James P. Willis' 'Late Permian global coal hiatus linked to super 13 C-depleted C0 sub 2 flux into the atmosphere during the final consolidation of Pangea' suggests a shift toward more negative delta 13 C values over the P/Tr boundary instead of more positive values. However, more positive values are expected since the Triassic is a warmer period compared to the Permian. Environmental parameters that occur during warmer periods have a positive shifting effect on the delta 13 C values.
Publication Name: Geology
Subject: Earth sciences
ISSN: 0091-7613
Year: 1996
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Evidence for abrupt latest Permian mass extinction of foraminifera: results of tests for the Signor-Lipps effect: comment and reply
Article Abstract:
Michael R. Rampino and associate presented proof for abrupt latest Permian mass extinction of foraminifera. They plotted the number of last occurrences of foraminifera against distance below the Permian-Triassic (P-tr) boundary and showed that 85% of taxa disappeared at the top of the Bellerophon Formation. However, inclusion of higher foraminiferal occurrences in their analysis would have extended the duration of the extinction interval.
Publication Name: Geology
Subject: Earth sciences
ISSN: 0091-7613
Year: 1999
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Tempo of the end-Permian event: high-resolution cyclostratigraphy at the Permian-Triassic boundary
Article Abstract:
Wavelet analysis of deposit continuity across the Permian-Triassic boundary suggests a catastrophic cause for the largest mass extinction in the geologic record. Faunal changes at this boundary can be constrained with an interval of 60,000 to 80,000 years.
Publication Name: Geology
Subject: Earth sciences
ISSN: 0091-7613
Year: 2000
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