Givetian

views updated May 08 2018

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).

A Dictionary of Earth Sciences AILSA ALLABY and MICHAEL ALLABY

Givetian

views updated May 29 2018

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.

A Dictionary of Zoology MICHAEL ALLABY

Givetian

views updated May 17 2018

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.

A Dictionary of Plant Sciences MICHAEL ALLABY