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Comprehending Geologic Time
AnthroLimited; offers a way to see by analogy the geologic time periods of the earth's history
Climate Prediction Center - The ENSO Cycle
Graphs, images, photographs, and summaries of the mean state of the Ocean, the ENSO Cycle, El Nino, and La Nina.
Inventory and Monitoring Program
National Park Service provides a long-term ecological monitoring program, species list, vegetation maps, and soils and geology maps.
Major Biomes of the World
Regional ecological groups of plants, soils, animals, climates--covers the globe
NSIDC Educational Resources (National Snow and
Snow, glaciers, avalanches, ice shelves and bergs, blizzards.
Oceanography: Ocean in Motion
Office of Naval Research Focus of Technology site: the oceans, their composition, tides, major currents, ocean life, habitats, research, etc.
Savage Earth
Articles about volcanoes, earthquakes, and tsunamis are presented along with animations that illustrate the action of these natural phenomena.
Stream System Technology Center
Designed to improve knowledge of stream systems and their processes.
U.S. Geological Survey Library
