The Presence of Iridium in Geologic Deposits Around the World

question 4

Multiple Choice

The presence of iridium in geologic deposits around the world supported the theory that:

• 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.

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