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Why Do Ice Ages Occur? - Part 1
http://www.museum.state.il.us/exhibits/ice_ages/why_4_cool_periods.html
From NASA ED Mall Collection
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This document discusses possible factors that contributed to the formation of massive continental glaciers during four periods of geologic history.
Intended for grade levels:
  • High (9-12)
  • College (13-14)
Type of resource:
  • Text:
    • Ref. material
Subject:
  • Cryology
  • Geological Sciences:
    • Geologic time
  • Hydrology
  • Ocean Sciences:
    • Physical oceanography
Technical requirements:
No specific technical requirements, just a browser required
Cost / Copyright:
No cost
Copyright and other restrictions information are unknown.
DLESE Catalog ID: NASA-Edmall-481
Resource contact / Creator / Publisher:
Publisher: The Illinois State Museum
http://www.museum.state.il.us/