A geologist discovers a fossil of an animal known to live only in hot, dry climates. What is the most likely conclusion the geologist can draw about the rock layer where the fossil was found?

The rock layer was once part of a desert environment.

The area was once a deep ocean.

The animal migrated to the area after the rock formed.

The rock layer formed during a volcanic eruption.

A geologist discovers fossils of coral within a layer of limestone on a high mountain. What is the best environmental conclusion?

The limestone was formed in a warm, shallow ocean.

The mountain was previously an active volcano that erupted coral fragments.

A massive flood transported the coral from the sea to the top of the mountain.

The coral evolved to survive in a high-altitude, cold-weather environment.

The exact pressure the rock layer experienced.

That the sand was deposited in an aquatic environment.

The direction the water was flowing when the sand was deposited.

The specific mineral composition of the individual sand grains.

The exact age of the rock in years.

The pressure under which the rock was formed.

The chemical composition of the rock.

The specific environmental conditions, such as climate and ecosystem, at the time of formation.

They are always perfectly preserved.

They show the type of life an environment could support.

They reveal the future climate of an area.

They are the only method geologists use to date rocks.