Lithification of some modern carbonate sediments in a hypersaline lake adjacent to the Black Sea
1975; Elsevier BV; Volume: 13; Issue: 4 Linguagem: Inglês
10.1016/0037-0738(75)90038-x
ISSN1879-0968
Autores Tópico(s)Food Industry and Aquatic Biology
ResumoIn the hypersaline Techirghiol Lake adjacent to the Black Sea, sporadically formed lithified blocks and grapestone are found which are the result of cementation of carbonate sediments with aragonite and possibly kutnahorite (manganesian calcite). The lithified blocks are characterized by a central cavity bordered by a lithified envelope. The formation of the carbonate cement is due to subaquatic bacterial processes of calcium sulfate reduction and the synthesis of calcium carbonate at the expense of gypsum concretions derived from Pleistocene red clays cropping out along the shore of the lake. These lithified blocks have geological significance as they may be usable as criteria for the recognition of sediments deposited in the past near to the shores of hypersaline lakes.
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