a medium-grained sandstone containing feldspar, derived from the erosion of igneous rock, esp. granite
Origin of arkoseFrench
A usually pinkish or red sandstone consisting primarily of quartz and feldspar and forming from the cementation of particles generated by the rapid erosion of granite.
Origin of arkoseFrench, perhaps from alteration of Greek arkhaios, ancient.
(countable and uncountable, plural arkoses)