Answer: shales

AnswerCrossword Clue
SHALES

Rocks formed from clay

SHALES

Layered minerals

SHALES

Fuel-yielding rocks

SHALES
Laminous rocks
SHALES
Oil-bearing rocks
SHALESFossil-yielding rocks
SHALESFissile rocks.
SHALESLayers of rock.
SHALESFine-grained rocks.
SHALESFissile rocks
SHALESLayered rocks
SHALESOil-producing rocks
SHALESTerrigenous rocks
SHALESSynthetic fuel sources
SHALESSome are bituminous
SHALESFossil rocks
SHALESPulitzer-winning journalist Tom
SHALESTV critic Tom
SHALESPulitzer-winning TV critic Tom
SHALESSources of oil