Ein geologischer Querschnitt durch den Randen von Schleitheim, nach Schaffhausen bis Thayngen (Exkursion H am 30. März 1989)

The Staffelegg Formation: a new stratigraphic scheme for the Early Jurassic of northern Switzerland

“…In the Klettgau area and from there in a south-western direction to the Frick area (canton Aargau), the basal layers of the Beggingen Member contain iron-ooids (Figs. 7, 10; see Jordan 1983;Schlatter 1989). In contrast, the upper layers (Bucklandi to Obtusum zone) occur over a larger area in northern Switzerland and consist mainly of locally strongly phosphoritic arenitic limestone which are rich in fossils; the bivalve Gryphaea arcuata LAM.…”

“…The Schleitheim Bed always has an erosive base; in the Klettgau area and from there in southwestern direction to the Frick area, these layers are iron ooliths (Fig. 7;Schalch and Peyer 1919;Schlatter 1989;Maisch et al 2008). In the Tabular Jura of the canton Fig.…”