What theory did the presence of iridium in geologic deposits around the world support?
A)The impact of a giant meteor that struck the Earth produced mass extinctions of dinosaur species across the planet.
B)Alien material was a factor in the origins of species on this planet.
C)Catastrophes occurred in the past and produced major changes in species,causing dinosaurs to adapt and eventually become mammals.
D)Cuvier's proposal of catastrophism as the theory explaining human origins is correct.

Question

Quizplus · Accepted Answer

The presence of iridium in geologic deposits around the world is evidence of a giant meteor impact, which supports the theory that mass extinctions of dinosaur species occurred as a result of the impact. This theory is called the asteroid impact theory.

What Theory Did the Presence of Iridium in Geologic Deposits