WHAT'S INSIDE: GEOLOGY

Geology is the study of the composition and physical properties of rocks, minerals, gems and other related earth materials, including diamonds and crystals. Scientists gain an understanding of the Earth's history by studying its composition.
  • Geologic Processes
  • Geologic Time Scale
  • Minerals
  • Paleontology
FEATURED: GEOLOGY

Devonian Period, a division of geologic time. It began about 395,000,000 years ago and lasted about 35,000,000 years.

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