Answer:
No dinosaur fossils are found above the Cretaceous Paleogene boundary.
Explanation:
Answer:
A. unusual distribution of fossils in the Southern Hemisphere
Explanation:
Gypsum is a chemical sedimentary rock.
Energy production/acid rain<span>, nuclear power/waste, </span>air pollution<span>/climate, heavy metals, pesticides, water </span>pollution<span>, solid waste, and unforeseen accidents.</span>