Earth History Inv. 3 Flashcard

Front

What gas did we blow into the calcium hydroxide liquid during the seawater investigation?

Back

Carbon dioxide.

Front

How do you know Muav is the oldest rock layer?

Back

It is at the bottom of the rock column.

Front

Which layer is the newest in the rock column?

Back

Kaibab.

Front

What principle states that older rocks are covered by newer rock layers?

Back

Principle of Superposition.

Front

What does the term 'crossbedding' describe?

Back

When rock layers are slanted.

Front

What is the definition of 'fossil'?

Back

The remains or impression of a prehistoric organism preserved in rock.

Front

What is the significance of the rock layers' order?

Back

It helps determine the relative ages of the rocks.

Front

What is 'cementation' in geology?

Back

The process by which dissolved minerals crystallize and glue particles of sediment together.

Front

What is 'compaction' in the context of sedimentary rocks?

Back

The process where sediments are pressed together under their own weight.

Front

What is an 'index fossil'?

Back

A fossil that is used to define and identify a particular time period.