Which observation would undermine, and not provide support for, the idea that a meteorite impacted Earth at the end

of the Mesozoic?
a. rapid decrease in sulfuric acid and nitric acid concentrations
b. thin, global iridium layer between Cretaceous and Paleogene rocks
c. soot layer between Cretaceous and Paleogene rocks
d. shock-metamorphosed quartz between Cretaceous and Paleogene rocks
e. an impact crater dated to Cretaceous times


a

Environmental & Atmospheric Sciences

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