The age of Earth is as vast in time as the universe is vast in space. It is not easy to really get a "feel" for 4,600 million years! One way to try to get a "feel" for how big it is, ... One comparison you can use is to compare the length of Earth's history to the length of a football field in the geologic time activity.
www.cotf.edu/ete/modules/msese/earthsysflr/geotime.html www.cotf.edu/ete/modules/msese/earthsysflr/geotime.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
Timeline of evolution - Wikipedia, the free encyclopedia
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This timeline of the evolution of life outlines the major events in the development of life on the planet Earth (See Organism). For a thorough explanatory context, see the history of Earth, and geol...
en.wikipedia.org/wiki/Timeline_of_evolution
Millipedes emerge 420 Mya as one of the first land animals. Instects appear on ... [7] 13.7 billion years ago:; Big Bang and origin of universe! Before the big bang, no time or space exists. Within 3 minutes of the big bang, there is still no light and no atoms, but only a superhot fog (108 oC) of protons and electrons.
www.ecotao.com/holism/bp.htm
What is the term for a single billion year period? What is a term for one billion years of geologic time? An element that means 1 billion years of geogical time? Term used to descibe 1 billion years of geological time?
wiki.answers.com/Q/What_term_would_mean_1_billion_years wiki.answers.com/Q/What_term_would_mean_1_billion_years
The Earth is very old -- 4.5 billion years or more -- according to recent estimates. This vast span of time, called geologic time by earth scientists, is difficult to comprehend in the familiar time units of months and years, or even centuries.
pubs.usgs.gov/gip/geotime/geotime.html pubs.usgs.gov/gip/geotime/geotime.html
Click on the image to see a graphical representation of geologic time; [344K] ... In Western Australia, single zircon crystals found in younger sedimentary rocks have radiometric ages of as much as 4.3 billion years, making these tiny crystals the oldest materials to be found on Earth so far. The source rocks for these...
pubs.usgs.gov/gip/geotime/age.html pubs.usgs.gov/gip/geotime/age.html
...a very long time, at least according to the way humans measure time. Based on relative and absolute age dating techniques, geologists now think that the earth was formed about 4,600,000,000 years ago. ... One of the challenges of any study of the earth is being able to comprehend just how long this is, and for what...
jersey.uoregon.edu/~mstrick/AskGeoMan/geoQuerry16.html
Starting point for geology and geochemistry ... Eon: The largest division of geologic time, embracing several Eras, for example, the Phanerozoic, 600 m.y. ago to present); also any span of one billion years.
www.geotech.org/survey/geotech/dictiona.html
Holocene (10,000 years to today); Pleistocene (1.8 mya to 10,000 yrs); Tertiary (65 to 1.8 mya) ; Pliocene (5.3 to 1.8 mya); Miocene (23.8 to 5.3 mya); Oligocene (33.7 to 23.8 mya); Eocene (54.8 to 33.7 mya); ... Welcome to the UCMP Web Lift for Geologic Time!
www.ucmp.berkeley.edu/help/timeform.html www.ucmp.berkeley.edu/help/timeform.html
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