Question: is arkose a type of limestone?
Answer: Arkose ( /ˈɑːrkoʊz/) is a detrital sedimentary rock, specifically a type of sandstone containing at least 25% feldspar. ... Arkose is generally formed from the weathering of feldspar-rich igneous or metamorphic, most commonly granitic, rocks, which are primarily composed of quartz and feldspar (called 'grus' as a sand).