| Abstrakt: |
The Liassic (Toarcian) Posidonienschiefer of southwestern Germany has been widely interpreted as the deposit of a predominantly anaerobic or severely oxygen-depleted epicontinental marine basin. Seilacher (1970) classified this deposit in his “Type (a) Stagnation Fossil-Lagerstätten”, a sediment body yielding an unusual amount of paleontological information because of exceptional preservation. Such preservation is thought to result when oxygen depletion in the lower part of the water column and in benthic sediments is sufficiently great to restrict predation, scavenging, deposit-feeding, and aerobic bacterial decay-factors which tend to break down organic remains prior to fossilization. |
