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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 ... The geology or deep time of Earth's past has been organized into various units according to events which took place. Different spans of time on  ...

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.rocksinmyheadtoo.com/TimeLine.htm

Earth Earth's Geologic Geological Time Scale Line Eon Era Period Epoch Life Forms Eons Eras Periods Epochs MYA Paleozoic Mesozoic Cenozoic Modern ...

geology.com/time.htm

Printable Geologic Time Scale - Geological Time Line from Geology.com. ... Geologists have divided Earth's history into a series of time intervals. These time  ...

www.geosociety.org/GSA/Education_Careers/Geologic_Time_Scale/GSA/timescale/home.aspx

Note that the compilers are still accepting comments on the overall content of time scale. Offer your comments or join in the discussion on GSA's Facebook page.

www.infoplease.com/science-health/physical-science/table-geological-periods

It is generally assumed that planets are formed by the accretion of gas and dust in a cosmic cloud, but there is no way of estimating the length of this process.

www.aoml.noaa.gov/outreach/floridaseagrant/pdf_files/TropicalConnections_GeologicalTimeWithMajorEvolutionaryEventsInFossilRecord_KruczynskiFletcher.pdf

The geological time scale is a method of relating the timing and relationship ... The Earth is more than 4.5 billion years old, and an appreciation of the expanse.

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

Two or more Eras form an Eon, the largest division of geologic time. Some periods are divided into epochs. The major periods in the geologic history of the Earth ...

news.nationalgeographic.com/news/2010/04/100406-new-earth-epoch-geologic-age-anthropocene

Apr 6, 2010 ... Earth's geologic epochs—time periods defined by evidence in rock ... "Changes to the geological time scale are treated with great seriousness ...