Paleozoic Era Quiz

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Questions and Answers

What percentage of Earth's history is represented by the Paleozoic Era?

6%

What is the age of the Earth in billion years?

4.6 billion

What is the term used to describe the relatively stable and immobile part of a continent?

craton

What is the term used to describe the exposed portion of the crystalline basement rocks of a continent?

<p>shield</p> Signup and view all the answers

What is the term used to describe a shallow inland sea that transgressed and regressed over the craton?

<p>epeiric sea</p> Signup and view all the answers

What are the three major geological eras in Earth's history?

<p>Paleozoic, Mesozoic, Cenozoic</p> Signup and view all the answers

What is the term used to describe the part of a continent where flat or gently-dipping sedimentary rocks were deposited?

<p>Platform</p> Signup and view all the answers

Define cratons.

<p>Relatively stable and immobile part of a continent, acting as the foundation on which all sediments were deposited.</p> Signup and view all the answers

What is the term used to describe elongated areas of mountain-building activity?

<p>Mobile Belt</p> Signup and view all the answers

What is the term used to describe a shallow inland sea that transgressed and regressed over the craton?

<p>Epeiric Sea</p> Signup and view all the answers

Flashcards

Paleozoic Era

Represents 6% of Earth's history.

Age of the Earth

The age of the Earth is approximately 4.6 billion years.

Craton

A continent's stable, immobile interior.

Shield

Exposed crystalline basement rocks of a continent.

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Epeiric Sea

Shallow inland sea that advances and retreats across a craton.

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Major geological eras

Paleozoic, Mesozoic, and Cenozoic.

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Platform

Area of flat, sedimentary rock deposition.

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Mobile Belt

Elongated zones of mountain building activity.

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Cratons

Relatively stable and immobile part of a continent, acting as the foundation on which all sediments were deposited.

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Epeiric Sea

Shallow inland sea that transgressed and regressed over the craton.

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Study Notes

Paleozoic Era

  • The Paleozoic Era comprises approximately 12% of Earth's history.

Earth's Age

  • Earth is estimated to be 4.54 billion years old.

Craton

  • Craton refers to the stable and immobile portion of a continent.

Shield

  • Shield describes the exposed portion of the crystalline basement rocks found within a craton.

Epicontinental Sea

  • A shallow inland sea transgressively and regressively over the craton, termed an epicontinental sea.

Geological Eras

  • The three major geological eras of Earth's history are the Paleozoic, Mesozoic, and Cenozoic Eras.

Platform

  • Platform describes the part of a continent where flat or gently-dipping sedimentary rocks were deposited.

Cratons

  • Cratons are the stable and immobile portions of a continent. They form the heart of continents with shields (exposed basement rocks) and platforms (flat or gently-dipping sedimentary rocks).

Mobile Belts

  • Mobile belts are elongated areas of mountain-building activity.

Epicontinental Sea

  • A shallow inland sea that transgressed and regressed over the craton.

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