Rocks and the Rock Cycle. A rock is a mixture of minerals, rock fragments, volcanic glass, organic matter, or other natural materials. What do you.
Sedimentary rock
Sedimentary Rock. Sedimentary rock is created when existing rock breaks down into sediments, and then the sediments are recombined by compaction and cementation.
Types of Rock. Igneous Rock How does it form? Rock that has formed from the cooling and solidification of magma or lava.
