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....
View Full Document
- Spring '08
- Dolomite, Limestone, carbonate minerals, Dolomite carbonate mineral