Web Results

en.wikipedia.org/wiki/Geologic_time_scale

Early work on developing the geologic time scale ... and the names of the geologic periods reflect ...

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.fossils-facts-and-finds.com/geologic-time.html

Geologic time periods are what geologists and paleontologists use to organize the time flow of earths history. Because of the huge scope of time, 4.5 billion ...

geology.com/time.htm

Subdivision of periods into epochs can be done only for the most recent portion of the geologic time scale. This is because older rocks have been buried deeply,  ...

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

The vast expanse of geological time has been separated into eras, periods, and epochs. The numbers included below refer to the beginnings of the division in ...

www.enchantedlearning.com/subjects/Geologictime.html

Geologic time chart of major biological and geological eras, with the pivotal events, eons, eras, periods and epochs.

www.enchantedlearning.com/subjects/dinosaurs/glossary/Period.shtml

The period is the basic unit of geological time in which a single type of rock system is formed. Two or more periods comprise a geological Era. Two or more Eras ...

www.thoughtco.com/geologic-time-scale-eons-eras-periods-1440796

Feb 28, 2017 ... This geologic time scale shows and gives dates for all of the defined eons, eras and periods of the ICS International Chronostratigraphic Chart.

scienceviews.com/dinosaurs/geologictime.html

The Earth carries the history of geological events in its rock layers. It follows ... An era of geologic time from the beginning of the Tertiary period to the present.