Fig. 23
From: The Staffelegg Formation: a new stratigraphic scheme for the Early Jurassic of northern Switzerland
Detailed section of the Early Jurassic strata at Lucheren (BE). α = beds rich in Plagiostoma (Rollier 1910); β = bluish chert nodules (see also Buxtorf 1907; Fischer and Luterbacher 1963 = 28); γ = whitish chert nodules; δ = bluish and grey chert nodules; ε = greyish black chert nodules; ζ = bluish and grey to dark grey chert nodules; π = compare Figs. 12, 13, 15, 16, 17, 18; ψ = for the biostratigraphic range of Lytoceras cf. fimbriatum (Sow.) see Schlatter (1991)