Arkose vs. Sandstone

Arkosenoun

(geology) A sedimentary rock consisting of small fragments of feldspar and quartz similar to a coarse sand.

Arkosenoun

A sandstone derived from the disintegration of granite or gneiss, and characterized by feldspar fragments.

Arkose

Arkose () is a detrital sedimentary rock, specifically a type of sandstone containing at least 25% feldspar. Arkosic sand is sand that is similarly rich in feldspar, and thus the potential precursor of arkose.

Sandstonenoun

A sedimentary rock produced by the consolidation and compaction of sand, cemented with clay etc.

Sandstonenoun

A rock made of sand more or less firmly united. Common or siliceous sandstone consists mainly of quartz sand.

Sandstonenoun

a sedimentary rock consisting of sand consolidated with some cement (clay or quartz etc.)

Sandstone

Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks.Most sandstone is composed of quartz or feldspar (both silicates) because they are the most resistant minerals to weathering processes at the Earth's surface, as seen in the Goldich dissolution series.