GeoForce Alaska Intro

GeoForce Alaska Intro

by John Welkener​

​Reference:

​Guidebook for Geoscience Academy in the Southwestern United States, Fourth Edition, 2017 by Jay Raney, Sigrid Clift and Sarah Fowell.

The idea that present-day geologic processes occur at about the same rates and produce similar results as those in the geologic past.

Uniformitarianism

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"The present is the key to the past."

Igneous - formed from volcanic processes

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Sedimentary - layers of mineral deposits build up over time

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Metamorphic​ - undergo changes due to intense heat and pressure

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Multiple Choice

Uniformitarianism

• The idea that present-day geologic processes occur at about the same rates and produce similar results as those in the geologic past.

• The Theory that all geologic processes are the same.

• The belief that Geologic processes change over time.

Multiple Choice

The three main types of rocks are:

• Ignous, Sedmintary, and Metamorphosis

• Igneous, Sedimentary, and Metamorphic

• Smooth, Scaly, Rounded

• Volcanic, Semintary, and Metamporphic

Multiple Choice

The Law of Superposition helps scientists to determine what?

• Relative density of rock layers

• Relative Age of Rock Layers

• Relative Size of Rock Layers

Fill in the Blanks

Open Ended

Open-ended: In the space below, type 1-3 sentences about something you learned during this GeoForce lesson.