Crossword Clue:

a type of rock

Answer	Crossword Clue
ACID	Type of rock
SHALE	Type of rock.
LAVA	Type of rock.

OOLITE	Type of rock.
SHALE	Type of rock
ARENA	Type of rock
PROG	Type of rock
POP	Type of rock
GLAM	Type of rock
INLIER	Type of rock formation.
BASALTIC	Type of volcanic rock

SILTSTONE	Type of sedimentary rock
GLAM	Glitzy type of rock
INDIE	Type of rock or film
ACID	Type of rock or rain
PET	Type of name or rock
ARENA	Type of rock or football
SOFT	Type of rock found in '70s
ARENA	Type of big time band or rock

AVIAN	Type of bone syndrome experienced by Jack's gold-digging girlfriend on "30 Rock"
IGNEOUS	Rock type
EMO	Rock type
GLAM	Rock type
ALTERNATIVE	Rock type
PSYCHEDELIC	Rock type
RHYTHMBLUES	Rock type (with "and")
GLAM	David Bowie's rock type