Intrusion= the movement of magma underground into spaces that exist within rock strata. When this magma cools and hardens, intrusive volcanic landforms are created. Weathering and erosion causes these landforms to be exposed.
Batholith is the name given to the largest of igneous rocks that form as a result of magma forcing its way into the rock above it. When it cools it forms granite and this can be exposed due to weathering and erosion.
A Dike is a vertical or near vertical sheet of rock that is created when magma is thrust into a body of rock. Dikes cut across layers of existing rock. When exposed on the earths surface Dikes can appear as a wall of volcanic rock.
The Great Rift Valley is a name given to the continuous geographic trench, approximately 6,000 kilometres (3,700 mi) in length, that runs from northern Syria in Southwest Asia to central Mozambique in East Africa.