GEOLOGY

Detailed explanation-1: -non-clastic siliceous sedimentary rock. Definition. Sedimentary rock that consists of at least 50 percent silicate mineral material, deposited directly by chemical or biological processes at the depositional surface, or in particles formed by chemical or biological processes within the basin of deposition.

Detailed explanation-2: -Sedimentary (sed-uh-MEN-tuh-ree) rocks are formed on or near Earth’s surface. Sedimentary rocks are divided into other groups. They are clastic or non-clastic.

Detailed explanation-3: -For the purposes of the present discussion, three major categories of sedimentary rocks are recognized: (1) terrigenous clastic sedimentary rocks, (2) carbonates (limestone and dolomite), and (3) noncarbonate chemical sedimentary rocks.

Detailed explanation-4: -Limestone is the most abundant of the non-clastic sedimentary rocks. Limestone is produced from the mineral calcite (calcium carbonate) and sediment. The main source of limestone is the limy ooze formed in the ocean.