Question

What significant geological event happened in the Long Valley-Mammoth Lakes area of California about 760,000 years ago?

A) Tsunami
B) Caldera formation
C) Glacial retreat
D) Volcanic eruption

Answer 1

The significant geological event that happened in the Long Valley-Mammoth Lakes area of California about 760,000 years ago was caldera formation (B).

Step-by-step explanation:

The significant geological event that happened in the Long Valley-Mammoth Lakes area of California about 760,000 years ago was Caldera formation (B).

A caldera is a large volcanic crater that forms when a volcano collapses or explosively erupts. In this case, the Long Valley Caldera was created by a massive volcanic eruption, leading to the formation of a large depression in the Earth's surface. The eruption was so powerful that it released a large amount of volcanic ash and debris, which covered the surrounding area.