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

Pennsylvanian Period, the geologic period that began about 310,000,000 years ago and lasted 30,000,000 years.

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Quiz: Name That Academic Field, Smartypants.

The "ologies" are coming! The "ologies" are coming! Academic disciplines such as anthropology, biology, paleontology and many others all cover specific intellectual subjects. Can you pick which "ology" matches the questions in our quiz?

How Archaeology Works

Archaeology is the study of humanity's material remains -- even a piece of an ancient pot can tell us a lot about the past. But how do archaeologists make sense of these relics?

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