A type of rock which is made as a result of cementation and compaction of sediment grains under pressure over a long period of time is called

Granite is an

A rock which is formed after lava eruption is called

Limestone's are very rich in

A relatively large and randomly oriented grains constitutes the rock

A rock which has been transformed from shale is

A crystalline or glassy rock formed when magma or lava cools down and solidifies is called

Obsidian is rich in

Marble is transformed from