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Aalenian Stage: References & Edit History
Article Contributors
Primary Contributors
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Carol Marie Tang
Senior Science Educator, California Academy of Sciences, San Francisco.
Other Encyclopedia Britannica Contributors
Article History
Type | Description | Contributor | Date |
---|---|---|---|
New text updating the boundary years for the stage added. | May 06, 2013 | ||
Added Jurassic Period geologic time scale. | Jul 07, 2011 | ||
New article added. | Jan 19, 2007 |
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