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Givetian

A Dictionary of Earth Sciences | 1999 | | Copyright

Givetian
1. An age in the Middle Devonian Epoch preceded by the Eifelian, followed by the Frasnian, and dated at 380.8–377.4 Ma ( Harland et al., 1989).

2. The name of the corresponding European stage that is zoned on goniatites and spiriferid brachiopods. It is roughly contemporaneous with the lower Condobolinian (Australia) and Erian (N. America).

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AILSA ALLABY and MICHAEL ALLABY. "Givetian." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "Givetian." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O13-Givetian.html

AILSA ALLABY and MICHAEL ALLABY. "Givetian." A Dictionary of Earth Sciences. 1999. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-Givetian.html

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Givetian

A Dictionary of Zoology | 1999 | | Copyright

Givetian An age in the Middle Devonian Epoch (about 391.8–385.3 Ma ago), preceded by the Eifelian and followed by the Frasnian, that is zoned on goniatites (Ammonoidea) and Spiriferida.

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MICHAEL ALLABY. "Givetian." A Dictionary of Zoology. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "Givetian." A Dictionary of Zoology. 1999. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O8-Givetian.html

MICHAEL ALLABY. "Givetian." A Dictionary of Zoology. 1999. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-Givetian.html

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Givetian

A Dictionary of Plant Sciences | 1998 | | Copyright

Givetian An age of the Devonian, dated at about 380–374 Ma ago; together with the underlying Eifelian (Emsian and Couvinian), it forms the Middle Devonian.

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MICHAEL ALLABY. "Givetian." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "Givetian." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O7-Givetian.html

MICHAEL ALLABY. "Givetian." A Dictionary of Plant Sciences. 1998. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-Givetian.html

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