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en.wikipedia.org/wiki/Geologic_time_scale

The geologic time scale (GTS) is a system of chronological dating that relates geological strata ..... In 1841 John Phillips published the first global geologic time scale based on the types of fossils found in each era. Phillips' scale helped ...

www.mcz.harvard.edu/Departments/InvertPaleo/Trenton/Intro/GeologyPage/Geologic%20Setting/geologictime.htm

The Modern Geologic Time Scale, as shown above, documents intervals of geologic ... the absolute ages of the rocks on which the relative time scale is based.

www.ucmp.berkeley.edu/help/timeform.php

Online exhibits. Geologic time scale. Take a journey back through the history of the Earth — jump to a specific time period using the time scale below and ...

www.ucmp.berkeley.edu/exhibit/histgeoscale.html

What is the origin of the geologic time scale? The first people who needed to ... Growth of a prehistoric time scale: based on organic evolution. Revised edition ...

geology.com/time.htm

Printable Geologic Time Scale - Geologcial Time Line from Geology.com.

geology.com/usgs/geologic-time-scale

A geologic time scale is composed of standard stratigraphic divisions based on rock sequences and is calibrated in years (Harland and others, 1982). Over the ...

pubs.usgs.gov/gip/geotime/relative.html

Jun 13, 2001 ... Therefore, the actual length of geologic time represented by any given ... time by dividing the Earth's history into Eras -- broad spans based on ...

pubs.usgs.gov/gip/geotime/geotime.html

Jul 28, 1997 ... This vast span of time, called geologic time by earth scientists, ... a relative time scale, based on the sequence of layering of the rocks and the ...

spongebobquh.wikispaces.com/%60+GEOLOGICAL+TIME+SCALE

GEOLOGIC TIME SCALE 1. What is the basis of the Geologic Time Scale? The Geologic Time Scale is based on fossil evidence in Earth's rocks and the age of ...

hyperphysics.phy-astr.gsu.edu/hbase/Geophys/geotime.html

The vast expanse of geological time has been separated into eras, periods, and ... The named divisions of time are for the most part based on fossil evidence ...