RT Journal Article
T1 Upper Viséan foraminiferal and algal diversity at Benburb, Northern Ireland as a tool of high-resolution biostratigraphy, and correlation of Late Viséan-Early Serpukhovian successions in Ireland and Britain
A1 Cózar Maldonado, Pedro
A1 Somerville, Ian D.
AB Foraminifers and calcareous algae from three limestone units of the Viséan aged Tyrone Group were examined: Maydown Limestone Formation, Blackstokes Limestone Formation, and Blackwater Limestone Formation. The foraminifers recorded from the Maydown Limestone Formation are generally sparse with mostly long-ranging genera. Foraminifers recorded from the Blackstokes Limestone Formation are also sparse, but they suggest a latest Asbian age. Foraminiferal assemblages from the Blackwater Limestone Formation are more diverse and contain rare, but important taxa, confirming an early Brigantian age in intermediate members of the formation. The algal assemblages are generally sparse, but richer in the Blackwater Limestone Formation, where more commonly, early Brigantian taxa occur. Foraminiferal and algal diversity trends confirm that the lower and middle units of the Maydown Limestone Formation can be assigned to Cf6γ1‒Cf6γ2a zones, and the upper unit to Cf6γ2b. The Blackstokes Limestone Formation is assigned to Cf6γ2c. All these units are of late Asbian to latest Asbian age. The youngest Blackwater Limestone Formation is assigned to Cf6δ zone of early Brigantian age. Foraminiferal and algal trend analysis has highlighted the strong similarities between the Benburb succession and those in south Cumbria, northern England and Scotland. This implies that the Asbian–Brigantian boundary has now been moved to a lower horizon, at the base of the Tullymore Limestone Member, which is better recognized by means of algal and foraminiferal diversity, instead of by the occurrence of individual taxa. These zones show close correspondence with those documented from south Cumbria and the Pennines of northern England.
PB Scandinavian University Press
SN 0024-1164
YR 2025
FD 2025-04-30
LK https://hdl.handle.net/20.500.14352/120787
UL https://hdl.handle.net/20.500.14352/120787
LA eng
NO Cózar, P., & Somerville, I. D. (2025). Upper viséan foraminiferal and algal diversity at benburb, northern ireland as a tool of high-resolution biostratigraphy, and correlation of late viséan-early serpukhovian successions in ireland and britain. Lethaia, 58(1), 1-21. https://doi.org/10.18261/let.58.1.8
DS Docta Complutense
RD 17 jul 2025