Answer:

schists

Answer	Crossword Clue
SCHISTS	Layered minerals
SCHISTS	Flaky metamorphic rocks
SCHISTS	Rocks that split readily.

SCHISTS	Fissile rocks.
SCHISTS	Foliated rocks.
SCHISTS	Crystalline rocks.
SCHISTS	Crystalline rocks
SCHISTS	Flaky rocks

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.