algal-coral bioherms, 2.5-8 m thick, 2.5-6 m across, 3-10 m distance between bioherms

Abstract ref. 2031:
Biostromal structures have been identified in the upper Valanginian and lower Hauterivian (lower Cretaceous) deposits along the Crimean mountains (USSR). The structures have been formed by scleractinians, algae, and rarely by hydrozoans. Reef facies first appeared during the upper Oxfordian (upper Jurassic) and northward migration of some 25-30 km continued until the Hauterivian. The migration was influenced by tectonic movements and uplift of Kimmerian massifs. 