Uppermost Ordovician to Lower Silurian graptolite biostratigraphy of the Wye valley, central Wales

Volume / Part: 37 / 3
Publication Date: November 1994
Page(s): 695 - 720
Authored By: Jan Zalasiewicz and Steve Tunnicliff

£1.00

The graptolite biostratigraphy of the persculptus to magnus Biozone interval (upper Hirnantian to lower Aeronian) in the Wye valley near Rhayader, central Wales, is described. Possible refinements to the graptolite zonal scheme are indicated, including informal subdivisions of the acuminatus and acinaces Biozones. Quantitative faunal assessment indicates that diplograptid: monograptid ratios are useful in indicating stratigraphical level. Selected taxa are described, including three new species, Normalograptus? wyensis, Pseudoglyptograptus barriei and ' Orthograptus' cabanensis.

Palaeontology - Volume 37 Part 3 Pages 695-720

Palaeontology - Volume 37 Part 3 Pages 695-720

Citations

ZALASIEWICZ, J., TUNNICLIFF, S. 1994. Uppermost Ordovician to Lower Silurian graptolite biostratigraphy of the Wye valley, central Wales. Palaeontology, 37, 3, 695–720.