Sedimentary rocks are formed by small rock pieces ... sediment which was carried in transport is laid down. 3 Sedimentation Layers of sediment form on top of each other in sedimentation.

There are three main types of rock: igneous rock, metamorphic rock ... or “weathered,” the sediment is moved by forces such as water and wind and deposited elsewhere in layers. Over time, these layers ...

There are three general approaches that allow ... The principle of superposition states that in an undeformed sequence of sedimentary rocks, each layer of rock is older than the one above it ...

Nearly horizontal layers of sedimentary rocks that formed in an ancient sea. The region was later uplifted and carved into the Canadian Rocky Mountains. Dinosaur bones (upper part of picture) at ...

These layers of sedimentary rock were deposited in Cambrian time, when another shallow sea covered this region. Among the fossilized remains found within these layers are brachiopods, trilobites ...