Question

QY

Question 1 (10 points)

The tall rock formations with smooth surfaces in Big Bend National Park were formed over time by

Answer 1

A warm shallow sea.

Step-by-step 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.