GEOLOGY

Detailed explanation-1: -Fossils are found in layers of sedimentary rock. Sedimentary rocks are formed from layers of sand, silt, dead plants, and animal skeletons.

Detailed explanation-2: -Where are fossils found? Fossils are found almost exclusively in sedimentary rocks-rocks that form when sand, silt, mud, and organic material settle out of water or air to form layers that are then compacted into rock.

Detailed explanation-3: -With the passage of time and the accumulation of more particles, and often with chemical changes, the sediments at the bottom of the pile become rock. Gravel becomes a rock called conglomerate, sand becomes sandstone, mud becomes mudstone or shale, and the animal skeletons and plant pieces can become fossils.

Detailed explanation-4: -A fossil is physical evidence of a prehistoric plant or animal. This may be their preserved remains or other traces, such as marks they made in the ground while they were alive. Fossilised remains-including fossil bones and teeth-are known as body fossils. Fossilised shells are also body fossils.