GEOLOGY

Detailed explanation-1: -Sedimentary rocks are laid down in layers called beds or strata. A bed is defined as a layer of rock that has a uniform lithology and texture. Beds form by the deposition of layers of sediment on top of each other. The sequence of beds that characterizes sedimentary rocks is called bedding.

Detailed explanation-2: -compaction-The process that presses sediments together. Over millions of years, thick layers of sediment build up. These heavy layers press down on the layers beneath them.

Detailed explanation-3: -How are they formed? Sedimentary rocks are formed when eroded fragments of old rocks and dead organisms settle (usually in seas or rivers) to form a sediment. Over millions of years, layers of sediment build up and are buried one on top of the other.

Detailed explanation-4: -Most fossils form when a dead organism is buried in sediment. Layers of sediment slowly build up. The sediment is buried and turns into sedimentary rock. The remains inside the rock also turn to rock.