USGS CMG InfoBank: Origin of the Sea Floor

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: 10:39 - 11:02 (00:23)
Source: Annenberg/CPB Resources - Earth Revealed - 4. The Sea Floor
Keywords: core, "mid-oceanic ridge", "sea floor spreading"

Our transcription: Analysis of cores taken from submarine rock reveals that the seabed becomes steadily older with increasing distance from the mid-ocean ridges.
This research indicates that the sea floor originates and grows outward from the ridges.
Geologists call this process "Sea Floor Spreading."

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

U.S. Department of the Interior | U.S. Geological Survey
URL: http://walrus.wr.usgs.gov/infobank/programs/html/school/moviepage/04.01.15.html
Page Contact Information: InfoBank staff
Page Last Modified: Tue Feb 5 05:13:55 PST 2013 (chd)