Sedimentary rocks are types of rock that are formed by the deposition of material at the Earth's surface and within bodies of water.

Limestone is an example of Sedimentary Rocks.

Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form".

Marble is an example Metamorphic Rock.

Igneous rock is formed through the cooling and solidification of magma or lava.

Diorite is an example of Igneous Rock.


The layering that occurs in most sedimentary rocks and in those igneous rocks formed at the Earth’s surface, as from lava flows and volcanic fragmental deposits.


The age of rocksand fossils in number of years could be determined through radiometricage dating.

Rock cycle

Younger soil could end up on top of older soil because of landslides or other earth moving events.

Living organisms have shaped the land by decaying and creating caves.