Geological History of Earth

Front

What is an intrusion in geology?

Back

An intrusion is created when molten rock pushes its way into rock layers that are already formed.

Front

What is the study of rock layers called?

Back

Stratigraphy.

Front

What does the Law of Superposition state?

Back

Within the layers of sedimentary rock, the youngest layer is at the top, and each layer below is older.

Front

When does a basaltic intrusion occur in relation to limestone deposition?

Back

After limestone was deposited.

Front

Do analyses provide absolute dates or relative dates?

Back

Analyses provide only relative dates, not an absolute scale.

Front

What is the geological time scale?

Back

A system that organizes Earth's history into different time intervals based on significant geological and biological events.

Front

What are sedimentary rocks?

Back

Rocks formed by the accumulation and compaction of mineral and organic particles.

Front

What is a fossil record?

Back

The history of life on Earth as documented by fossils, which are the remains or traces of ancient organisms.

Front

What is the difference between relative dating and absolute dating?

Back

Relative dating determines the sequence of events, while absolute dating provides a specific age.

Front

What are rock strata?

Back

Layers of rock that are stacked on top of one another, often representing different periods of deposition.