Link to USGS home page
USGS Home
Contact USGS
Search USGS
Coastal & Marine Geology InfoBank

USGS CMG InfoBank: Glacial Deposits

Skip navigational links
Search InfoBank
Home tab FACS tab Activities tab Atlas tab Geology School tab More tab More tab Geology School tabs
   
Dictionaries: The USGS and Science Education   USGS Fact Sheets   Topics   Keywords   Data Dictionary   Metadata Dictionary   Computer Terminology   Digital Formats
InfoBank Terms: Activity ID   activity overview   crew   formal metadata   lines   metadata   NGDC   port stops   project/theme   region   ship   stations   time   virtual globe   year  
Data Types: bathymetry   geodetic positioning   gravity   ground penetrating radar   imagery   LIDAR   magnetics   metering equipment   navigation   samples   seismic   definitions disclaimer  
Data Formats: ARC coverage   E00   FGDC metadata   gridded/image   imaging   material   scattered/swath   Shapefile   vector/polygon  
   
Comment: 17:13 - 17:58 (00:45)

Source: Annenberg/CPB Resources - Earth Revealed 23. Glaciers

Keywords: continent, "ice sheet", glacier, "glacial ice", "glacial melt", "glacial flow", moraine, till, drumlin, lake, basin, kettle, esker, civilization, silt, loess, "fertile soil", deposition

Our transcription: Across the interiors of continents, the ice sheets left moraines hundreds of kilometers long.

Streamlined mounds of till, known as "drumlins," were sculpted by flowing and melting ice.

Thousands of lake filled basins, called "kettles," were caused by the melting of ice buried in till.

Sinuous ridges of sediments left by sub-glacial streams, known as "eskers," wind across the land.

Most important to our modern civilization, however, are the wind-blown deposits of glacial silt, or "loess," which have weathered to form rich farmland soil.

Geology School Keywords

Skip footer navigational links


InfoBank   Menlo Park & Santa Cruz Centers   St. Petersburg Center   Woods Hole Center   Coastal and Marine Geology Program   Geologic Information   Ask-A-Geologist   USGS Disclaimer  

FirstGov button   Take Pride in America button