Which of the following is not a piece of evidence supporting the idea that an impact caused the mass extinction that occurred 65 million years ago?
A)Fossilized dinosaur bones contain fragments of rock from the impact.
B)Unusually large abundances of iridium and other rare metals are found in a layer of clay that dates to 65 million years ago.
C)A large impact crater along the coast of Mexico dates to 65 million years ago.
D)Grains of quartz formed under high pressure are found in a layer of clay that dates to 65 million years ago.

Question

Quizplus · Accepted Answer

Fossilized dinosaur bones containing fragments of rock from the impact is not a piece of evidence supporting the idea that an impact caused the mass extinction that occurred 65 million years ago. Rather, it is an example of how scientists were able to determine that an impact was responsible for the extinction event, as the rocks found in the fossils were identified as coming from an impact site. The other three choices are all pieces of evidence that support the idea of an impact causing the mass extinction.

Which of the Following Is Not a Piece of Evidence