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12.1 What is Unstable Land?

In this section you will find materials that support the implementation of 12.1: What is Unstable Land?. Use the navigation below to find the materials.

Section Materials


Visions of Earth, by AGI
A four-DVD set on interactions in Earth systems.

Landslides Hazard Program, by USGS
Use this USGS site to get information on landslides. It has information on what is done to prevent them, and what is done to help those who are affected by them.

Sinkholes, by USGS
This is another USGS page that is devoted to Sinkholes.

Debris-Flow Hazards in the United States, by USGS
Fact Sheet 176-97 Site examines different types of debris flows, where they are likely to occur, and steps to take to minimize the damages associated with debris flows.

Real-Time Monitoring of an Active Landslide, by USGS Cascades Volcano Observatory
Site contains data related to the monitoring of an active landslide:

Landslide monitoring, Woodway, Washington, by USGS
Site devoted to the study and monitoring of a landslide in western Washington. Includes a summary of the data collected, including rainfall, pore pressure, and movement data.

Landslide Recognition and Safety Guidelines, by USGS
Comprehensive site reviews what makes an area susceptible to landsliding and what do to if you are in a high-risk area, as well as providing links to finding out more about landslides.

Landslide Images, by USGS
A compilation of landslide images, including a color map of the United States illustrating landslide distribution and several photographs of damage caused by landslides.

Colorado Geological Survey
Learn about rockfalls, landslides, mudslides, debris flows, subsidence, etc.):

Florida Geological Survey
Learn about sinkholes

Illinois State Geological Survey
Learn about karst and sinkholes

Cave Model Formation, Earth Science Week
Your students can model cave formation using clay, water and sugar cubes. This investigation was developed by the National Park Service.

Landslide Investigation, Earth Science Week
An investigation on landslides, developed by the Association of American State Geologists, is also on the Earth Science Week web site.

Unstable Land, by Earth Science Week
A third unstable land investigation on the Earth Science Week web site models sinkhole formation.

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Visions of Earth, by AGI
82 High-definition animations showing a variety of Earth and space system processes.

Landslides and Debris Flows- Fly-by Movies, Animations, & Photos, by USGS
Movies and animations on Landslides

Land subsidence animation: Las Vegas Valley, by U.S. Geological Survey / Nevada Bureau of Mines and Geology / NASA / Stanford University
Animation of land-surface deformation of Las Vegas Valley, Nevada, compiled from interferograms for 1992 to 1999. Seasonal land subsidence and uplift due to ground-water withdrawals and artificial recharge control the vertical deformation and faults contribute to the areal extent and patterns of deformation.

Land subsidence animation: Lost Hills (5 MB), by Vince Realmuto, JPL
Ground subsidence in the Belridge and Lost Hills oil fields, near Bakersfield, California, based upon the 18 year difference between USGS and Space Radar Topography Mission (SRTM) Digital Elevation Models (DEMs). The image morphs between the two DEMs and uses a Landsat image overlay. The vertical dimension has been exaggerated by 300 times for clarity; maximum subsidence was approximately 3 meters.

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