The history of the earth is broken up into a hierarchical set of divisions for describing geologic time. As increasingly smaller units of time, the generally accepted divisions are eon, era, period, epoch, age. In the time scale shown at left, only the two highest levels of this hierarchy are represented.
www.ucmp.berkeley.edu/exhibit/histgeoscale.html www.ucmp.berkeley.edu/exhibit/histgeoscale.html
Here you can journey through the history of the Earth, with stops at particular points in time to examine the fossil record and stratigraphy. ... Click on any division of the time scale to the left. ... Learn about the history of the geologic time scale.
www.ucmp.berkeley.edu/exhibits/geologictime.php www.ucmp.berkeley.edu/exhibits/geologictime.php
Shift-Click to download a zipped Microsoft Excel worksheet version of this page: history.zip (12k) ... Harland, W. Brian, Richard Armstrong, Allan Cox, Craig Lorraine, Alan Smith and David Smith. 1990. A Geologic Time Scale 1989. New York: Cambridge University Press.
www.dinosauria.com/dml/history.htm www.dinosauria.com/dml/history.htm
The Earth has been around for approximately four and a half billion years! The geologic time scale is the timeline that describes all this time. ... Scientists have found rocks that formed during every time period of Earth's history! In sedimentary rocks, they have found millions of fossils and clues to past environment.
www.windows.ucar.edu/tour/link=/earth/past/geologic_tim... www.windows.ucar.edu/tour/link=/earth/past/geologic_time.html
The Hadean Eon of geologic time began with the birth of the solar system, including our planet, Earth, and ended with the formation of the oldest rocks that are still preserved on the surface of Earth. The Hadean is the first period in Earth history, but one for which we have little record.
paleobiology.si.edu/geotime/main/ paleobiology.si.edu/geotime/main/
Geologic time scale, Geologic time scale - Terminology, Geologic time scale - History of the time scale, Geologic time scale - Table of geologic time, Geologic time scale - Graphical timelines, Geologic time scale - External link...
www.experiencefestival.com/a/Geologic_time_scale_-_Hist... www.experiencefestival.com/a/Geologic_time_scale_-_History_of_the_time_scale/id/1423138
A selection of articles related to Geologic time scale - History of the time scale ... A Wisdom Archive on Geologic time scale - History of the time scale...
www.experiencefestival.com/geologic_time_scale_-_histor... www.experiencefestival.com/geologic_time_scale_-_history_of_the_time_scale
The Geologic Time Scale is being updated.; 16-October-2001; Thank you for your patience. ... Smithsonian, National Museum of Natural History ... Natural History Highlights...
www.mnh.si.edu/highlight/paleo_plant/geo_scale4.htm www.mnh.si.edu/highlight/paleo_plant/geo_scale4.htm
The two museums selected for this particular exercise are wonderful locations to learn about the history of our planet, Earth, and ponder the evolution of Earth Systems through the eons. I invite you to spend ... As you wander through these Halls of Time, try to place Earth history in a context that is meaningful to you.
comp.uark.edu/~sboss/essinternet01.htm
Geologic time scale - Wikipedia, the free encyclopedia
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