I am the most common sedimentary rock.

I am a well-known chemical sedimentary rock of which 50% consists of calcium carbonate.

I am a course-grained igneous rock that is usually found in massive formations and composes most of the earth’s continental crust.

I am the most common sedimentary rock

Substances that are found naturally in the earth and have a crystalline structure.

A type of rock formed when preexisting rocks are altered by heat and pressure

The largest group of minerals, which compose over 90% of the earth’s crust.

Hard, round structures that form when minerals settle out of water and crystallize around a sand grain or other mineral fragment.