Pic Description: Mainly composed of carbonate minerals (greater than 50%) composed of sedimentary rocks. The main mineral component is calcite, dolomite, ankerite, magnesite, etc., followed by quartz, mica, feldspar and clay minerals; chemical composition is mainly CaO, MgO, and CO2, followed by SiO2, TiO2, FeO, Fe2O3, Al2O3, K2O, Na2O, H2O, and certain trace elements. Usually gray, gray. Brittle. With grain dust (eg, debris, biological debris, etc.), biological framework (such as coral, layer foraminifera, etc.), grains (coarse grain, medium grain, fine grain, ceramic, etc.) and residual (residual biological, residual oolitic like) structure. Structural type of complex, diverse, laminated structure (such as is common in tidal flat areas of stromatolites), Ukraine eye structure and suture construct. Mostly thick or thin like output.
