Geologic Time Scale


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Geologic Time Scale
Originally uploaded in Integrating Research and Education:Trail Guides.

Image 17929 is a 900 by 530 pixel JPEG
Uploaded: Nov18 09


Last Modified: 2009-11-18 22:33:41
The file is referred to in 1 page
Provenance
http://3dparks.wr.usgs.gov/coloradoplateau/timescale.htm
Reuse
Time subdivisions and geologic ages in millions of years (Ma) are after the Geological Society of America 1999 Geologic Time Scale: http://www.geosociety.org/science/timescale/timescl.pdf. Web-safe colors choices are arbitrary but follow standard map colors for geologic ages. Another generalized geologic time scale is available at: http://geology.er.usgs.gov/paleo/geotime.shtml.