Which best supports the evidence that an asteroid collision may have caused caused the extinction of dinosaurs?(1 point)
Responses
Many dinosaur skeletons are found in one particular rock layer.
Many dinosaur skeletons are found in one particular rock layer.
Dinosaur fossil remains are found at the bottom of a body of water.
Dinosaur fossil remains are found at the bottom of a body of water.
Rare metal on Earth called Iridium is found in layers where dinosaurs disappeared.
Rare metal on Earth called Iridium is found in layers where dinosaurs disappeared.
Bodies of dinosaurs are only found in craters where asteroid collided.
Rare metal on Earth called Iridium is found in layers where dinosaurs disappeared.
This statement best supports the evidence that an asteroid collision may have caused the extinction of the dinosaurs. The presence of a significant layer of iridium, which is rare on Earth's crust but abundant in asteroids, is found at the K-T boundary (Cretaceous-Paleogene boundary). This layer corresponds with the time period when the dinosaurs, along with numerous other species, went extinct around 66 million years ago. The high iridium levels lend support to the Alvarez hypothesis, which postulates that a massive asteroid or comet impact led to the mass extinction event.