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Section 5
Rock Units and Your Community

In this section you will find materials that support the implementation of EarthComm, Section 5: Rock Units and Your Community.


Inquiring Further

  1. To make sedimentary formations, each student will need:
    • Two (different) colored batches of sand
    • Roasting pan
  2. To make plutons, each student will need:
    • Several (different) colors of clay
    • Caulk, toothpaste, or cake frosting

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Resources

To learn more about this topic, visit the following web sites:

Rock Units

Geologic Maps and Mapping, USGS
Learn more about interpreting geologic maps.

How to Read a Geologic Map, About.com
Provides a tutorial to learn how to read and use geologic maps.

National Cooperative Geologic Mapping Program, USGS
Explains how geologic features and rock units are shown on geologic maps.

Sedimentary Rock Units

Grand Canyon - Geologic Formations, NPS
A geologic history of the events that formed the vast array of geologic features and rock types of the Grand Canyon.

Igneous Rock Units

Atlas of Igneous and Metamorphic Rocks, Minerals, and Textures, University of North Carolina
Provides examples of plutonic (intrusive igneous rocks) and volcanic (extrusive igneous rocks) textures.

Metamorphic Rock Units

Atlas of Igneous and Metamorphic Rocks, Minerals, and Textures, University of North Carolina
Provides examples of different microtextures of metamorphic rocks.

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