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Yosemite in Depth: Geology

The vastness of geologic time can be difficult to comprehend. We're not used to thinking in terms of millions of years, much less billions of years — but scientists believe the Earth is 4.5 billion years old! The picture below helps put geologic time in perspective, showing geologic time periods in increments of thousands, millions, and billions of years.
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Geologic Timeline

Move your mouse over the stars on the image below to find out what was happening on Earth then.

4.5 billion years before present 3.4 billion years before present 500 million years before present 700 million years before present 245 million years before present 400 million years before present 200 million years before present 195 million years before present 65 million years before present 175 million years before present 150 million years before present 60 million years before present 25 million years before present 10 million years before present 3.5 million years before present 2.5 million years before present 1.2 million years before present 100,000 years before present 10,000 years before present Present 5 million years before present


You can also view or print a non-interactive version of this information (9K). (Click here to get the Adobe Acrobat Reader.)

 
 
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 Yosemite National Park Home Page
http://www.nps.gov /archive/yose/education/depth/geology/timeline/timeline.htm
Last modified Wednesday, 22-Dec-2004 10:14:49 Eastern Standard Time
Yosemite National Park Web Manager