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9 July, 04:57

A geologist in south dakota finds an assemblage of dinosaur bones in an outcrop for the hilltown formation, and his colleague in china discovers an assemblage of bones from a different dinosaur in the liaoning formation. what can be said about the two formations? they are the exact same age. they are no older than jurassic. they are no younger than triassic in age. they are no younger than cretaceous in age.

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  1. 9 July, 05:15
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    The appropriate answer is d. The bones are no younger than Cretaceous in age. Scientists have used evidence from the fossil record to confirm that dinosaurs became extinct at the end of the Cretaceous. The catastrophe that caused the extinction was an impact from an asteroid that fell off the coast of the Yucatan peninsula in Mexico. All dinosaur fossils are no younger than Cretaceous in age.
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