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Geomorphology
Branch of geology dealing with surface land features and the processes that create and change them.
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Geomorphology and sediment transport -- river mechanics [More info]
Current river mechanics research on particle friction angles of fluvial gravels (data files compressed in BenHex, Winzip and Unix) and Grand Canyon Beach evolution (animation requiring Java 1.0) plus digital elevation files (*.hgx and *.zip files).
Fluvial geomorphology studies in Kansas [More info]
Report of completed studies that have investigated the response of river and stream channels in Kansas to a variety of human-caused and natural disturbances.
PDF A dryland river transformed--the Little Colorado, 1936-2010 [More info]
We mapped substantial migration of the river channel between the City of Winslow and the Navajo Nation community of Leupp; in a human lifetime the river has moved more than a mile across its valley floor.
Assessment of potential coastal impacts: Hurricane Rita [More info]
Areas susceptible to inundation during landfall of Hurricane Rita are assessed by comparing lidar-derived dune elevations to simulated storm surge values. Results shown on pictorial maps.
Bedrock geology of the Yosemite Valley area Yosemite National Park, California [More info]
Site explains the general bedrock geology of the Yosemite Valley area.
Biological soil crusts [More info]
Explains biological soil crusts, organism-produced soil formations commonly found in semiarid and arid environments, with special reference to their biological composition, physical characteristics, and ecological significance.
PDF Biological soil crusts: webs of life in the desert [More info]
Fact sheet on the need to protect biological soil crusts in the desert. These crusts are most of the soil surface in deserts not covered by green plants and are inhabited by cyanobacterium (blue-green algae) and other organisms useful to the ecosystem.
PDF Candidate cave entrances on Mars [More info]
Newly discovered candidate cave entrances into Martian near-surface lava tubes, volcano-tectonic fracture systems, and pit craters and describes their characteristics and exploration possibilities.
Costly landslide events in the United States: map layer description file [More info]
GIS data set from the USGS National Landslides Hazards Program showing major landslide events in the United States and Puerto Rico with metadata. Map layer can be downloaded in shapefile format or SDTS format.
Detection and measurement of land subsidence using Global Positioning System surveying and interferometric synthetic aperture radar, Coachella Valley, California, 1996-2005 [More info]
Detailed measurements of elevation help to understand the extent and severity of subsidence. Study asks if subsidence indicates the aquifer system is compacting temporarily or permanently, and are the changes human-induced or tectonic.
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