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National Park Service: What Is Geologic Time?

Curated by ACT

A discussion of geologic time, along with a presentation of evidence for the time span involved.

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Concepts
geologic time scale, geologists, relative dating
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Additional Tags
geological eras, earth's crust, national park services: what is geologic time?, ancient earth, radiometric ages, relative geologic time scale
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Classroom Considerations
  • Knovation Readability Score: 5 (1 low difficulty, 5 high difficulty)
  • The intended use for this resource is Instructional