Titlebook: Extinction Events in Earth History; Proceedings of the P Erle G. Kauffman,Otto H. Walliser Conference proceedings 1990 Springer-Verlag Berl

Fretful

Late Ordovician graptolite mass mortality and subsequent early silurian re-radiation,n in low oxygen but bacteria-rich waters similar to those found in the modern Eastern Tropical Pacific. Areal reduction in those environments as well as reduction in food resources preferred by graptolites resulted in diminished graptolite populations. These reductions took place gradually in many p

plasma-cells

Frasnian/famennian event in the Holy Cross Mts, Central Poland: Stratigraphic and ecologic aspects,en algae biota, on the remaining shoals characterised the earliest Famennian time. More successful colonization by diversified, Famennian-type benthic and pelagic faunas started in the . Zone, which reflects progressive habitat recovery within the seriously disturbed shelf ecosystem.

逢迎春日

TOM

Important considerations in the investigation of global bioevents,