What is an “Arkose”?

Arkose is a type of sandstone, primarily composed of feldspar minerals, and typically formed from the weathering of granite.

Characteristics of Arkose

• Feldspar Content: Arkose contains more than 25% feldspar, which makes it distinct from other sandstones.
• Formation: It forms in areas where granite or other feldspar-rich rocks are broken down by weathering.

Example

• Red or pink color: Due to feldspar, arkose often appears reddish or pink, seen in many desert and mountain regions.

Summary: Arkose is a sandstone rich in feldspar, formed from the weathering of granite and often found in mountainous regions.