It consists of plant and animal remains. Tell the students that chalk is a type of limestone. Some buildings are also built from limestone. Sandstones are another type of sedimentary rocks used in buildings. Fossils are found in some types of sedimentary rocks.
Fossils are any remains of ancient life.
Some examples include shell prints, leaf prints, or animal tracks. Fossils give us evidence about the plants and animals that lived long ago, and the nature of the environment at that time. Pumice is an igneous rock. It was thrown into the air as lava from a volcano. Pass around a piece of pumice.