Mudcracks and rare raindrop impressions also attest to fluctuating water levels and occasional drying of these lake beds, and the black shales yield rare but excellently preserved fossils, particularly of various plant remains, and occasional fish.
(Mudcracks and rare raindrop impressions; also attest; to fluctuating water levels and occasional drying of these lake beds) (the black shales; yield; rare) (excellently preserved fossils, particularly of various plant; remains; )
Mudcracks and rare raindrop impressions the black shales excellently preserved fossils, particularly of various plant
also attest yield remains
to fluctuating water levels and occasional drying of these lake beds
rare