Stacked biostromes with different composition.
Biotic succession in Steltenberg studied by ref. 1371. During diversification stage: Alveolitids (49 %), lamellar stromatoporoids (18 %), rugosa (14 %), thamnopores (4 %), amphipores (2 %), auloporids (4 %), green algae (1 %), Dendrostella (rugosa 2 %) of all fossils.
