Coastal & Marine Geology InfoBank

Home FACS Activities Atlas Geology School Related Sites More

USGS CMG InfoBank: Reconstructing Ancient Landscapes

Skip navigational links
Loading
Dictionaries: Our Mapping Systems   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   digital data   formal metadata   lines   metadata   NGDC   port stops   project/theme   region   ship   stations   time   virtual globe   year  
Data Types: bathymetry   biological   geochemical   gravity   ground penetrating radar   imaging   LIDAR   logs   magnetics   metering equipment   navigation   samples   seismic   total station   definitions disclaimer  
Data Formats: ARC coverage   E00   FGDC metadata   gridded/image   imaging   material   scattered/swath   Shapefile   vector/polygon  
Comment: 17:49 - 18:37 (00:48)
Source: Annenberg/CPB Resources - Earth Revealed - 17. Sedimentary Rocks: The Key to Past Environments
Keywords: "sedimentary rock", "clastic sediment", "sedimentary structure", geologist, "mud crack", "ripple mark", cross-bedding, landscape, "San Andreas Fault", "San Gabriel Fault", "Ridge Basin", "Southern California", basin, mountain

Our transcription: By understanding how mud cracks, ripple marks, cross-bedding, and other sedimentary structures and textures form, geologists can, in a sense, read the sedimentary rock record.
This allows them to reconstruct the physical appearance of ancient landscapes.
One place such work is being done is known as the "Ridge Basin," a thick sequence of sedimentary rocks sandwiched between the San Andreas and San Gabriel faults in Southern California.
Today, this area is not a basin at all; it is instead part of a young growing mountain range.
Yet 5 to 10 million years ago it was a deep depression.

Geology School Keywords
Skip footer navigational links

Coastal and Marine Science Centers:  Pacific   St. Petersburg   Woods Hole  
InfoBank   Coastal and Marine Geology Program   Geologic Information   Ask-A-Geologist   USGS Disclaimer  


Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://walrus.wr.usgs.gov/infobank/programs/html/school/moviepage/16.01.21.html
Page Contact Information: InfoBank staff
Page Last Modified: Thu Oct 31 04:27:09 PDT 2013  (chd)