Arkose is one of the important type of rocks. If we have to define Arkose in general, Arkose is a sedimentary rock, specifically a type of sandstone containing at least 25% feldspar. Arkose comes under Sedimentary Rocks. All Sedimentary Rocks have similar properties and formation process. Along with Arkose Definition, know more about the History of Arkose, Etymology of Arkose in next sections.