ar·kose 
(ärkōs)
(ärkōs)n.
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.
[French, perhaps from alteration of Greek arkhaios, ancient.]
- blackcap
- black cherry
- blackcock
- black cod
- black cohosh
- black coral
- Black Country
- black cow
- black crappie
- black cumin
- black currant
- blackdamp
- Black Death
- black diamond
- black duck
- black dwarf
- black economy
- blacken
- blackener
- Black English
- Black English Vernacular
- black eye
- black-eyed pea
- black-eyed Susan
- blackface