Ypresian

A Dictionary of Earth Sciences | 1999 | 441 words | Copyright

Ypresian
1. The earliest age in the Eocene Epoch, preceded by the Thanetian (Palaeocene), followed by the Lutetian, and dated at 56.5–50 Ma ( Harland et al., 1989).

2. The name of the corresponding European stage, named after the Ypres Clay, Belgium. It is roughly contemporaneous with the Penutian and lower Ulatizian (N. America), upper Waipawan, Mangaorapan and lower Heretaungan (New Zealand), and the lower Johannian (Australia).

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AILSA ALLABY and MICHAEL ALLABY. "Ypresian." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "Ypresian." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O13-Ypresian.html

AILSA ALLABY and MICHAEL ALLABY. "Ypresian." A Dictionary of Earth Sciences. 1999. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-Ypresian.html

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