A compound is a substance that contains two or more elements close elementA pure substance that is made from only one type ... limestone, shale, and sandstone are all examples of sedimentary rocks.

These sedimentary rocks are born from the decay and fossilization ... and sandstone. Put simply, limestone is a type of rock ...

There are three main types of rock: igneous rock ... to bury them and shelter them from scavengers and decay. Mudstone, shale, and limestone are examples of sedimentary rock likely to contain fossils.