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Geochemistry
Study of the distribution of chemical elements and natural compounds on the earth and in the atmosphere and the chemical processes that affect the earth.
Subtopics:
Soil chemistry (4 items)
Water chemistry (120 items)

Geochemical anomaly maps (9 items)
Related topics:
Results 1 - 10 of 175 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.
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.
Agricultural chemicals [More info]
Overview of the Toxic Substances Hydrology Program role in investigating the occurrence and fate of agricultural chemicals with links to investigations, headlines, on-line fact sheets, new publications, bibliographies and photo gallery.
Alaska mineral resources [More info]
Reports, data, and current research on mineral resources in Alaska
Amargosa Desert research site [More info]
Online reports, site description and photographs of the Amargosa Desert research site monitoring low level radioactive waste.
Assessing the Vulnerability of Public-Supply Wells to Contamination: Glacial Aquifer System in Woodbury, Connecticut [More info]
Sources and effects of contamination surrounding a single well in western Connecticut
Assessing the vulnerability of public-supply wells to contamination--Edwards aquifer near San Antonio, Texas [More info]
Well vulnerability results from the young age of groundwater. Karst features permit contaminants to move into the aquifer easily, leading to a well mixed aquifer; geochemical processes do not degrade contaminants quickly.
Atchafalaya & Mississippi River Deltas study: a tale of two deltas [More info]
Project of the Gulf of Mexico Integrated Science program that evaluates the transport and sedimentation of contaminates through the Mississippi River and Atchafalaya River delta to the near-shore Gulf of Mexico. Includes aerial photographs.
Bedrock and soil geochemistry from Voyageurs National Park, Minnesota [More info]
Maps and text (Word or PDF format) and database (Excel or HTML format) for bedrock, forest floor, and mineral soil sampling in Voyageurs National Park, Minnesota to establish the background and baseline geochemistry and terrestrial mercury sources.
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