Late Ordovician mass extinction: A new perspective from stratigraphic sections in central Nevada

Authors
Finney, SC Berry, WBN Cooper, JD Ripperdan, RL Sweet, WC Jacobson, SR Soufiane, A Achab, A Noble, PJ
Citation
Sc. Finney et al., Late Ordovician mass extinction: A new perspective from stratigraphic sections in central Nevada, GEOLOGY, 27(3), 1999, pp. 215-218
Citations number
15
Categorie Soggetti
Earth Sciences
Journal title
GEOLOGY
ISSN journal
00917613 → ACNP
Volume
27
Issue
3
Year of publication
1999
Pages
215 - 218
Database
ISI
SICI code
0091-7613(199903)27:3<215:LOMEAN>2.0.ZU;2-I
Abstract
Integrated sequence stratigraphic, biostratigraphic, and chemostratigraphic analyses of three stratigraphic sections in central Nevada indicate that L ate Ordovician glaciation-induced sea-level fall produced diachronous, step wise faunal turnover in graptolites, conodonts, chitinozoans, and radiolari ans, and also triggered a strong, but transient, positive delta(13)C excurs ion. This pattern is very different from that described for most mass extin ction events.