geo 9 - Limestone rock consisting of mostly the minerals...

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Craton an old, very stable block of continental crust. Dolomite carbonate mineral consisting of MgCa(CO3)2. It is the most stable carbonate mineral in the oceans, but it precipitates very slowly and is almost never present. Instead, it is found predominantly in ancient sediments where it forms when the sediments are buried. "Dolomite" also refers to rock consisting of mostly of the mineral dolomite. Facies rocks with a group of characteristics that imply a certain origin or history. Formation a group of rocks with similar characteristics that can be recognized in the field and whose distribution can be plotted on a map. Ga billion years old Grainstone carbonate rock consisting of grains of carbonate sand without finer-grained carbonate (micrite) between them.
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Unformatted text preview: Limestone rock consisting of mostly the minerals calcite and aragonite . Lithofacies rocks with a group of characteristics that imply a certain origin or history. Ma million years old Mesoproterozoic adjective implying conditions between 1 billon years ago and 1.6 billion years ago. Micrite very fine (1-5 microns) carbonate crystals (either calcite or aragonite ). It composes carbonate mud. Micrite can precipitate from seawater or form from the breakdown of larger carbonate grains. Most modern micrite is the result of calcifying algae. Microbialite a sediment that is demonstrably influenced by micro-organisms. It is similar to the term " stromatolite ", but explicitly implies a biological origin or influence....
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