3 years ago

QY

Chemistry

1 answer:

maria [59]3 years ago

7 0

Answer:

A warm shallow sea.

Explanation:

A warm, shallow sea invaded the Big Bend during the Cretaceous Period, some 135 million years ago, providing the setting for deposition of lime mud and the remains of sea-dwelling organisms such as clams and snails. Limestone layers formed from those shallow muds are now visible throughout much of the Big Bend.

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