Coastal & Marine Geology InfoBank

Home FACS Activities Atlas Geology School Related Sites More

USGS CMG InfoBank: Conclusion

Skip navigational links
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: 25:55 - 26:53 (00:58)
Source: Annenberg/CPB Resources - Earth Revealed - 6. Plate Dynamics
Keywords: "James Sadd", "plate tectonics", modeling, theory, earthquake, volcano, mountain, orogeny, "sea floor spreading", mechanism, plate, "North American Continent", "Pacific Ocean", Rockies, "Alfred Wegener", "continental drift"

Our transcription: Plate tectonics is a model of the way the Earth works.
The significance of this theory lies in the fact that it connects many seemingly unrelated geologic phenomena, such as earthquakes, volcanic activity, mountain building, sea floor spreading.
Yet certain questions remain. For one thing, we don't fully understand the mechanisms that drive plate movement.
Also, it's undeniable that there are certain places where the geologic relationships don't fit easily into the plate tectonic model.
The western margin of North America between the Pacific and the Rockies is one such example.
However, unanswered questions like these don't mean failure.
Instead, they propel Science forward forcing scientists to reevaluate the assumptions of existing theories.
Nearly 100 years ago Alfred Wegener challenged the scientific orthodoxy with his theory of continental drift.
That challenge resulted in nothing less than a revolution in earth sciences.

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 logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: InfoBank staff
Page Last Modified: Thu Oct 31 04:25:52 PDT 2013  (chd)