USGS: Science Topics: rocks and deposits

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Rocks and deposits

Solid masses that make up the earth's crust as well as accumulations of materials. Use for major rock types and unconsolidated deposits. For deposits of economic value, see related terms.

Subtopics:
Permafrost (2 items)
Fossils (14 items)
Igneous rocks (10 items)
Metamorphic rocks (2 items)
Sedimentary rocks (14 items)
Unconsolidated deposits (20 items)
Petroleum (79 items)

Lithologic maps (17 items)

Related topics:

Results 141 - 150 of 156 listed by similarity [list alphabetically]

Summary of Bed-Sediment Measurements Along the Platte River, Nebraska, 1931-2009 [More info]: Studies of the size of bed sediment along the length of a river through time show how the river channel will be affected by development or management efforts.
The Alaska Geochemical Database: v. 1.0 - Geologic Materials [More info]: Geochemical analyses of rocks, mineral separates, lake and stream sediment bulk samples, heavy-mineral concentrates, and soils collected by USGS in Alaska from 1962 through 2009.
The Geologic Story of Colorado's Sangre de Cristo Range [More info]: Rock types, geologic structure, and the history of their formation in this mountain range.
The Yukon River Basin Active Layer Network: A cooperative project between the Yukon River Inter-Tribal Watershed Council and the U.S. Geological Survey [More info]: Monitoring soil temperature, soil moisture, air temperature, and overall thickness of the soil and sediment that is above the permafrost, therefore undergoing freeze-thaw cycles. Climate change may affect this active layer; we want to know how it does.
Thermal Properties of Methane Gas Hydrates [More info]: This unusual form of hydrocarbons can alter the thermal properties of host sediments; the analysis presented here helps us understand how those sediments might behave under natural or human-induced changes in the environment.
Unconsolidated aquifers of upstate New York [More info]: Information on aquifers in upstate New York which consist of unconsolidated deposits of sand and gravel that occupy major river and stream valleys or lake plains. Links to aquifer maps at scales 1:24,000 or 1:250,000 and cooperative publications.
Use of Semipermeable Membrane Devices (SPMDs) in Petroleum Polluted Waters [More info]: Provides a brief discussion of issues surrounding the use and capabilities of SPMDs, which can be used in monitoring petroleum spills.
USGS East-coast sediment analysis: analysis, procedures, database and georeferenced displays [More info]: Grain-size analysis of marine sediments of the U.S. eastern coast with sampling and lab methods, surficial sediment database in three formats (Excel, Dbase IV, ASCII), and use of geographic mapping tools for visualizing sediment data layers.
USGS EDMAP Program-Training the Next Generation of Geologic Mappers [More info]: How to apply for funding for students to complete geologic mapping projects, with a list of universities who have participated in the program.
USGS geology in the parks [More info]: U.S. Geological Survey and National Park Service virtual geology sites organized by geology topics and individual parks.

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