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Click on any division of the time scale to the left. ... Visit our exhibit on plate tectonics, an important geological concept in any time period...
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www.ucmp.berkeley.edu/exhibit/geology.html
www.ucmp.berkeley.edu/exhibit/geology.html
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Geologic time scale - Wikipedia, the free encyclopedia
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The geologic time scale is a chronologic schema (or idealized model) relating stratigraphy to time that is used by geologists, paleontologists and other earth scientists to describe the timing and r...
en.wikipedia.org/wiki/Geologic_time_scale
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These can not be included in the diagram for practical reasons, but can be found in Harland et al., 1990, along with a detailed description of the history of earlier-proposed time scales and the terminology, methodology and data involved in constructing this geological time scale.
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www.talkorigins.org/faqs/timescale.html
www.talkorigins.org/faqs/timescale.html
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NOTE: Ages and names used here are based on U.S. Geological Survey Fact Sheet 2007-3015, "Divisions of Geologic Time -- Major Chronostratigraphic and Geochronologic Units", March 2007, ages have been rounded, see publication for precise timeframe.
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vulcan.wr.usgs.gov/Glossary/geo_time_scale.html
vulcan.wr.usgs.gov/Glossary/geo_time_scale.html
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Geologic time chart of major biological and geological eras, with the pivotal events, eons, eras, periods and epochs. By Enchanted Learning Software, which creates children's educational software designed to stimulate creativity, learning, enjoyment, and imagination. ... Geologic Time Scale; Long Version (Go to the...
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www.enchantedlearning.com/subjects/Geologictime.html
www.enchantedlearning.com/subjects/Geologictime.html
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2009 GEOLOGIC TIME SCALE CENOZOIC CHRON. ANOM. ANOM. HIST. HIST. MESOZOIC CHRON. Sources for nomenclature and ages are primarily from Gradstein, F., Ogg, J., Smith, A., et al., 2004, A Geologic Time Scale 2004: Cambridge University Press, 589 p. Modifications to the Triassic after: Furin, S., Preto, N., Rigo, M., Roghi,
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www.geosociety.org/science/timescale/timescl.pdf
www.geosociety.org/science/timescale/timescl.pdf
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An intro to the Geological Timescale and dating the Earth's past ... Scientists divide the Earth into a number of periods - the "Geological time-scale", according to the rock types and sort of fossils found in each one. These divisions are pretty arbitrary, like any man-made divisions, but they at least can serve as...
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www.palaeos.com/Timescale/default.htm
www.palaeos.com/Timescale/default.htm
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GSA Geologic Time Scale ... The time scale printed in April/May 2009 GSA Today contained a spelling error (under ORDOVICIAN: HIMANTIAN should be HIRNANTIAN). This page contains the corrected version. [ read about the changes | view PDF ] ... Home Page | Privacy | Contact Us © The Geological Society of America, Inc.
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www.geosociety.org/science/timescale/
www.geosociety.org/science/timescale/
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