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**Petrological characteristics:** Arkose is a detrital sedimentary rock, specifically a type of sandstone containing at least 25% feldspar. Quartz is typically the dominant mineral component, with some mica also often present. In addition to these minerals, rock fragments may form a significant part of the composition. Arkose commonly contains small amounts of calcite cement or cement containing iron oxide. Its color ranges from gray to reddish. **Genesis:** Arkose generally forms from the weathering of feldspar-rich igneous or metamorphic rocks, most often granite, which is composed primarily of quartz and feldspar. These rocks typically develop in arid or cold environments and thus serve as indicators of these climate conditions.
