GEOLOGY

Detailed explanation-1: -Many limestone layers also contain fossils of such animals as corals, brachiopods, clams, bryozoans, crinoids, and one-celled fusulinids that were preserved whole or nearly whole.

Detailed explanation-2: -The minerals calcite and dolomite are the main ingredients of limestone. Both are calcium-bearing carbonate minerals, meaning that they contain the chemical elements calcium (symbol Ca), carbon (symbol C) and oxygen (symbol O).

Detailed explanation-3: -Fossils are typically found in sedimentary rocks and occasionally some fine-grained, low-grade metamorphic rocks.

Detailed explanation-4: -Mudstone, shale, and limestone are examples of sedimentary rock likely to contain fossils.