What is arkose?
Q: What is arkose?
A: Arkose is a type of sandstone that is rich in the mineral feldspar.
Q: What is the composition of arkose?
A: Arkose is mostly made up of quartz and contains at least 25% feldspar. It may also consist of fragments of rock and small amounts of calcite cement.
Q: What color is arkose?
A: Arkose is usually grey to reddish in color.
Q: What kind of sand grains does arkose have?
A: The sand grains in arkose are usually coarse.
Q: How is arkose formed?
A: Arkose is generally formed from the weathering of igneous or metamorphic rocks, usually granite rocks that contain a lot of feldspar and quartz.
Q: What is arkose often found with?
A: Arkose is often found with conglomerate deposits where the sediment is made of granite.
Q: What is the central Australian monolith Uluru made of?
A: The central Australian monolith Uluru is made of late Neoproterozoic/Cambrian arkose, deposited by the erosion of a granite-based mountain range.
