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

Breccia Rock

Metamorphic rocks have been modified by heat, pressure and chemical process usually while buried deep below Earth's surface. A type of metamorphic rock is marble.


Igneous rocks are formed from the solidification of molten rock material. A type of Igneous rock is Pegmatite.


Stratification: A formation of layers, classes, or categories.

Stratification is in this rock

We can determine the age of landforms by how pressure has packed in the sediment. The more opaque the layer is the older it is. We can also determine  age through fossils. If you find a fossil within a layer of sediment along with volcanic ash then you ccan connect that  the fossil and the volcanic eruption (the ash making up most of the layer of rock) are from the same time period. If you find the same fossil somewhere else,

If the amount of seismic activity increases then, the younger layers of the earth may be under the older layers because, the breaking of the layer may cause pieces to shift.

Most limestones form in shallow, calm, warm marine waters, attaching onto the previous landform.