Question

1. How old are the oldest rocks that are found in Yellowstone National Park? What Geologic Eon do these rocks belong to? (You may have to look this second question up in your textbook) 2. What cause the Yellowstone Geysers to erupt? 3. Where did the sandstone boulders in and around Indian Pond come from? 4. What kind of gases come out of the ground and under the lake around Yellowstone?

Answer 1

Answer:

1. Oldest rocks found in Yellowstone national park are 500 million years old I.e. they are of precambrian time period.

2. Yellowstone geysers erupt due to the presence of hotspot i.e. continuous hot plume of materials from the mantle. This hot material melts the surrounding region/rocks and lead to the volcanic eruption or causing the earthquakes.

3. The sandstone boulders in and around Indian pond were came from the melting of a glacier that was present in this area before thousands of years. When all the glacier melted , the rock boulders were remained at the end and were eventually became the part of the pond.

4. Carbon dioxide, methane, neon, argon, water vapor, hydrogen sulfide etc came out of the ground and under the lake around Yellowstone.