Crossword Genius

Layered rock (5)

Ross

I believe the answer is:

shale

'layered rock' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for shale that I've seen before include "Oil-bearing rock" , "Soft rock; heals (anag.)" , "Easily-split sedimentary rock" , "Fine pieces of stone on leash" , "Layered sedimentary rock" .)

I've seen this clue in The New York Times and the Penny Press.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.