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Givetian

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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"Givetian." A Dictionary of Earth Sciences. . Encyclopedia.com. 22 Aug. 2017 <http://www.encyclopedia.com>.

"Givetian." A Dictionary of Earth Sciences. . Encyclopedia.com. (August 22, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/givetian

"Givetian." A Dictionary of Earth Sciences. . Retrieved August 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/givetian

Givetian

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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"Givetian." A Dictionary of Zoology. . Encyclopedia.com. 22 Aug. 2017 <http://www.encyclopedia.com>.

"Givetian." A Dictionary of Zoology. . Encyclopedia.com. (August 22, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/givetian-1

"Givetian." A Dictionary of Zoology. . Retrieved August 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/givetian-1

Givetian

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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"Givetian." A Dictionary of Plant Sciences. . Encyclopedia.com. 22 Aug. 2017 <http://www.encyclopedia.com>.

"Givetian." A Dictionary of Plant Sciences. . Encyclopedia.com. (August 22, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/givetian-0

"Givetian." A Dictionary of Plant Sciences. . Retrieved August 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/givetian-0