Conodont faunas from the upper part of the Wadleigh Limestone, Alexander terrane, southeastern Alaska, are of Frasnian to early Famennian age and include the new taxa Polygnathus aspelundi nanus n.

Late Devonian strata of the Jerome Member of the Martin Formation crop out extensively in the Verde Valley of northern Arizona. Most of this member consists of rather monotonous light gray dolomite ...

Figure 1. A: Scheme of Frasnian-Famennian (F-F) global event and two-step Kellwasser crisis (based on Gereke and Schindler, 2012), and related volcanic events after Winter (2015, his figure 2). B ...

Grzegorz Racki, Michał Rakociński, Leszek Marynowski, Paul B. Wignall. Mercury enrichments and the Frasnian-Famennian biotic crisis: A volcanic trigger proved? Geology, 2018; DOI: 10.1130/G40233.1 ...

The die-off climaxed at the end of the period’s Frasnian stage, which lasted from around 385 million to 375 million years ago. The extinction began an extended interval of low biodiversity known ...