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Biological and physical processes
All continuing activities, functions, and phenomena associated with organisms and non-living matter.
Subtopics:
Atmospheric and climatic processes (166 items)
Ecological processes (100 items)
Fires (24 items)
Geologic processes (314 items)
Geochemical processes (17 items)
Ocean processes (43 items)
Coastal processes (32 items)
Estuarine processes (2 items)
Physiological processes (8 items)
Hydrologic processes (250 items)
Evolution (1 items)
Impact cratering (1 items)
Results 21 - 30 of 741 listed alphabetically [list by similarity]
PDF Acid Rain in Shenandoah National Park, Virginia [More info]
Explains acidity and acid rain and how it affects aquatic organisms. Describes the effect of acid rain on this national park, identifying areas that are at greater or lesser risk from acid rain.
Acid rain and our Nation's Capital [More info]
Describes noticeable effects of acid rain on the building stones and monuments in Washington, DC.
PDF Acid rain effects on Adirondack streams - results from the 2003-05 western Adirondack stream survey (the WASS Project) [More info]
Acidified soils caused toxic aluminum in 66 percent of 565 assessed streams. Diatoms and aquatic macroinvertebrates were moderately to severely affected. These effects have not improved in areas surveyed in the early 1980s
Acute toxicity database [More info]
The following database summarizes the results from aquatic acute toxicity tests conducted by the USGS CERC located in Columbia, Missouri.
Advanced National Seismic System (seismic network) [More info]
A program of studies with instruments to provide accurate and timely data and information on seismic events, including their effects on buildings and structures, employing modern monitoring methods and technologies.
Advanced National Seismic System: Products and services [More info]
Maps, data, and services provided to help people understand earthquakes that have occurred.
PDF Airborne Volcanic Ash - A Global Threat to Aviation [More info]
Explains the problem, describes procedures used to cope with it, ways of monitoring and detecting hazardous conditions, and warning systems currently available to help mitigate the dangers.
Alaska Volcano Observatory [More info]
Homepage for Alaska Volcano Observatory (AVO) with offices in Anchorage and Fairbanks monitors and studies Alaska's hazardous volcanoes. Links to featured news, updates, publications and products, and a volcano atlas for Alaska.
PDF Alaska volcanoes guidebook for teachers [More info]
The lessons and activities in this guidebook are meant to supplement and enhance existing science content already being taught to Alaskan students in grade levels 6-12.
Albuquerque Seismological Lab [More info]
The USGS Seismological Laboratory in Albuquerque installs and maintains a world network of seismograph stations, collects the seismic data, and evaluates seismic instruments. Site includes links to ASL publications, earthquake maps and seismic data.
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