Question

Gerta finds a sedimentary rock with large clasts cemented together. Each clast is larger than 2 mm. Gerta has found _____.

sandstone
an evaporite
limestone
a conglomerate

Answer 1

The answer is the final choice; a conglomerate.

Answer 2

Gerta has found a conglomerate.

Conglomerate is a clastic sedimentary rock that contains large (greater than two millimeters in diameter) rounded particles. The space between the pebbles is generally filled with smaller particles and/or a chemical cement that binds the rock together.