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Frasnian

Frasnian

A Dictionary of Earth Sciences | 1999 | | Copyright

Frasnian (Frasien)
1. An age in the Late Devonian Epoch, preceded by the Givetian (Middle Devonian), followed by the Famennian, and dated at 377.4–367 Ma ( Harland et al., 1989).

2. The name of the corresponding European stage, which is noted for the culmination of the first major radiation of the single-celled Foraminiferida and for the origin of important groups of goniatites, prolecanitids, goniatitids, and clymeniids. It is roughly contemporaneous with the Senecan (N. America) and part of the Condobolinian and Hervyan (Australia).
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AILSA ALLABY and MICHAEL ALLABY. "Frasnian." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

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Frasnian

A Dictionary of Zoology | 1999 | | Copyright

Frasnian A stage of the Devonian Period, about 385.3–374.5 Ma ago) that is noted for the culmination of the first major radiation of the single-celled Foraminiferida. The stage is the penultimate of seven. Three important groups of goniatites, the prolecanitids, goniatitids, and clymeniids arose during this stage.
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MICHAEL ALLABY. "Frasnian." A Dictionary of Zoology. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

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

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

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Frasnian

A Dictionary of Plant Sciences | 1998 | | Copyright

Frasnian The penultimate of the seven stages of the Devonian Period, dated at about 374–367 Ma ago.
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MICHAEL ALLABY. "Frasnian." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

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

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

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