What is the one piece of evidence that suggests that the dinosaurs were made extinct by the impact of an asteroid 65 million years ago?
A) the crater from this impact can still be seen in the deserts of Arizona
B) a layer of sediment laid down at that time contains grains of shocked quartz, solidified rock droplets, and soot from global wildfires
C) a layer of sediment laid down at that time is littered with dinosaur fossils
D) dinosaur fossils are found in rock layers older than 65 million years but not younger than 65 million years

Question

Quizplus · Accepted Answer

The layer of sediment laid down at that time contains grains of shocked quartz, solidified rock droplets, and soot from global wildfires, indicating a catastrophic event such as an asteroid impact. Other options, such as the existence of a crater in Arizona or dinosaur fossils in rock layers, do not directly provide evidence for the asteroid impact theory. The fourth option is actually contrary to the asteroid impact theory, as it suggests that dinosaurs existed prior to the impact and not after.

What Is the One Piece of Evidence That Suggests That