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Divisions of geologic time-major chronostratigraphic and geochronologic units

Revised geologic time scale indicating the ages of the lower bounds of chronostratigraphic and geochronologic units as they are currently known. Modifications to those ages made since the previous time scale was released (2007) are clearly marked.

by USGS Geologic Names Committee and Orndorff, Randall C. (Editor)
U.S. Geological Survey Fact Sheet 2010-3059
Related topics:
Archaean, Cambrian, Cretaceous, Devonian, Ediacaran, Eocene, Hadean, Holocene, Jurassic, Miocene, Mississippian, Oligocene, Ordovician, Paleocene, Pennsylvanian, Permian, Pleistocene, Pliocene, Silurian, Triassic, Geochronology, Geologic history, Geologic time periods, Information system design and development, Standards
Alternative formats of this information:
Compatible standard Format
CCM of Project Open Data JSON
ISO 19115 XML
USGS Publications Warehouse [Citation page] - [JSON]

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