Flintstone bands, Jasmund National Park, Rügen Island, Mecklenburg-Vorpommern, Germany

Photographer: Lutz Geißler
Location: Jasmund National Park, Rügen Island, Mecklenburg-Vorpommern, Germany
Latitude: 54,539°
Longitude: 13,678°
Date: 05/30/2009

Description:
Flintstone bands are a typical feature of the chalk coast of Rügen Island. The flintstones are no rocks deposited together with the chalk but formed in-situ within the chalk. Lower units of the chalk with less or no available oxygen changed their pH-value caused by bacterial activity. As a result, silicic acid was released out of SiO₂-forming organisms like radiolarians and diatoms,which are important constituents of the chalk. This silicic acid accumulated especially at relics of former organisms. Thus, flintstone seems to be a kind of a concretion.

Tags: Baltic Sea, chalk, chert, Feuerstein, Feuersteinbildung, Feuersteinentstehung, flint, flintstone, ice age, Kieselsäure, Kreide, Kreideküste, Mecklenburg-Vorpommern, Ostsee, pleistocene, Rügen, Schreibkreide, silicic acid, Steilküste

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