Update
04-06-2007
Content Type
Activity
Grade Level
Seventh grade, Eighth grade
Object Type
PDF
License

Divisions of Geologic Time – Major Chronostratigraphic and Geoschronoloc Units is a fact sheet showing the major chronostratigraphic (position) and geochronologic (time) units as determined by the members of the Geologic Names Committee of the U.S. Geological Survey. The colored diagram on page 2 is a handy reference for use with many earth science learning activities.