Miospores from the Brigantian stratotype section at Janny Wood, Cumbria

McLean, Donald; Owens, Bernard; Bodman, David J.; McLean, Finlay D.

doi:10.1144/pygs2017-004

Cited by 12 publications

(9 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nevertheless, those taxa can be rarely recorded from the late Asbian (Waters et al 2017a, b). McLean et al (2018) analysed the miospore assemblages in the basal Brigantian stratotype section at Janny Wood, and suggested that the VF zone should be situated at a level below the shales between the Robinson and Birkdale Limestone, or even older, in the latest Asbian. Ingrams et al (2020) recorded the NM zone in the Woodend Limestone; however, the occurrence of this biozone in the early Brigantian is not unusual (Cózar et al 2006).…”

Section: Northumberland Coastmentioning

confidence: 99%

Foraminiferal biostratigraphy of Brigantian-Arnsbergian limestones from eastern Scotland and Northumberland (northeast England)

Cózar¹,

Somerville

2020

Earth and Environmental Science Transactions of the Royal Society of Edinburgh

View full text Add to dashboard Cite

Foraminifers, calcareous algae and incertae sedis Algospongia of late Asbian to late Brigantian age in limestones from East Fife, East Lothian and Northumberland, enable the base of the late Brigantian to be recognised in all these areas. Preservation of the late Asbian and early Brigantian limestones in cyclothemic successions is generally poor. The St Monans White Limestone (St Monans, Fife), First Abden Limestone (Kirkcaldy, Fife), Middle Longcraig Limestone (East Lothian) and Lower Bath-House Wood/Middle Bath-House Wood (Northumberland) were confidently correlated by their foraminiferal assemblages. These limestones are all assigned to the top of the Assemblage 6 in northern England (Single Post Limestone). The St Monans Brecciated/St Monans Little/Charlestown Main limestones (St Monans, Fife) and the Second Abden/Seafield Tower limestones (Kirkcaldy, Fife), Upper Longcraig/Lower Skateraw limestones (East Lothian), Upper Bath-House Wood/Shotto Wood limestones and Eelwell Limestone (Northumberland) are assigned to the Assemblage 7 in northern England (Scar Limestone and Five Yard Limestone). The paired Middle/Upper Skateraw limestones (East Lothian) and the Acre Limestone (Northumberland) contain representatives of the Assemblage 8 from northern England (Three Yard Limestone). Higher up in the succession, in Northumberland, the foraminiferal assemblage in the Sandbanks Limestone can be compared with Assemblage 9 in northern England (Four Fathom Limestone). Above the Great Limestone and Little Limestone, with their characteristic Pendleian assemblages, the Sugar Sands Limestone and Corbridge Limestone contain Arnsbergian foraminiferal assemblages, typical of the Lower Felltop Limestone in northern England. The Lower Foxton Limestone is correlated with the Upper Felltop Limestone, whereas the Thornbrough Limestone in Northumberland lacks diagnostic Arnsbergian taxa.

show abstract

Section: Northumberland Coastmentioning

confidence: 99%

Foraminiferal biostratigraphy of Brigantian-Arnsbergian limestones from eastern Scotland and Northumberland (northeast England)

Cózar¹,

Somerville

2020

Earth and Environmental Science Transactions of the Royal Society of Edinburgh

View full text Add to dashboard Cite

show abstract

“…In 2004, the IUGS International Subcommission on Carboniferous Stratigraphy recognised the Viséan as the formal international stage, and thus, the Holkerian became a formal regional substage (Heckel and Clayton 2006). As with many other British substages of the Viséan since their definition in 1976, subsequent revision of stratotypes have raised problems and inconsistencies (Simpson and Kalvoda 1987, Riley 1993, 1994, Cózar and Somerville 2004, Aretz and Nudds 2005, McLean et al 2018. The base of the Holkerian at Barker Scar represents the last of the Viséan stratotype sections to be investigated and revised (Cózar et al 2022).…”

Section: The British Holkerian Substagementioning

confidence: 99%

A potential global chronostratigraphic boundary for the base of the middle Viséan

Cózar¹,

Somerville²,

Hounslow³

2023

nos

View full text Add to dashboard Cite

High-resolution foraminiferal biostratigraphy of carbonates immediately below and near the base of the Holkerian Substage in three sections of the South Cumbria Shelf allows the recognition of the Cf5α and Cf5β subzones. The most complete section at Grubbins Wood is almost free of dolomitisation. At the White Scar Quarry and Barker Scar sections, minor faunal gaps are inferred at the base of one or both subzones, respectively. The Grubbins Wood section has the most limited exposure, whereas White Scar Quarry has extensive exposure of this interval, especially the basal horizons of the subzones, compared to Barker Scar. The Grubbins Wood section, because of its exceptional foraminiferal record is more suitable for the establishment of a coincident boundary stratotype for the mid Viséan and Holkerian boundary at the base of the Cf5β subzone. However, the Barker Scar section should be retained as the Holkerian unit stratotype for Britain, with the base of the Holkerian repositioned lower in the section, at the base of the Cf5β subzone. White Scar is a suitable unitparastratotype, filling data gaps due to possible faunal gaps and dolomitisation at Barker Scar. The rich foraminiferal assemblages allow good global correlation with other regional zonations, which if refined in other countries, would allow a more affirmative global chronostratigraphic basal boundary for the middle Viséan.

show abstract

“…As mentioned above, many shaley facies in the upper part of the studied succession could be only dated using miospore zones, and hence, there is an important issue concerning the correlation of the base of the NC zone. For some authors, the base of this zone should be correlated with the P 2b ammonoid subzone (e.g., George et al, 1976; Owens et al, 2004; Waters et al, 2011), whereas for others, it should be correlated with intermediate levels of the P 1a subzone (Sevastopulo & Wyse Jackson, 2009), or its base should be correlated with the base of the P 2a subzone (McLean et al, 2018). Miospore details in Owens et al (2004) and Owens, McLean, Simpson, Shell, and Robinson (2005) suggest that the NC zone occurs in shales associated with the St Monans Little Limestone and Second Abden Limestone in Fife, Scotland and the Five Yard Limestone in northern England, and thus, the correlation with the P 2b zone is followed here (Figure 2).…”

Section: Criteria For the Definition Of The Serpukhovian Stage And Sumentioning

confidence: 99%

“…For the correlation with the ammonoid and miospore zones, the biozones of those fossil groups recognized in the Alston Block are adopted here, based on data in Owens, McLean, and Bodman (2004), Brand (2011), Waters, Somerville, Stephenson, Cleal, and Long (2011), Waters, Millward, andThomas (2014), andMcLean (2018). As mentioned above, many shaley facies in the upper part of the studied succession could be only dated using miospore zones, and hence, there is an important issue concerning the correlation of the base of the NC zone.…”

Section: Criteria For the Definition Of The Serpukhovian Stage And mentioning

confidence: 99%

Irish Serpukhovian revisited

Cózar

Somerville

2020

Geological Journal

View full text Add to dashboard Cite

In this study of Mississippian rocks in Ireland, it is now recognized, based on faunal evidence, that several upper Viséan limestone formations which were previously excluded from the Serpukhovian now belong, in part, to the lower two substages of the Serpukhovian. A reassessment of previous foraminiferal determinations, together with new foraminiferal data, has confirmed that rocks equivalent to the Tarusian and Steshevian substages are present in several sections. In the Slievenaglasha Formation and Magowna Formation (County Clare) and Deer Park Formation (County Meath), Tarusian and Steshevian foraminiferal assemblages are thus recorded. In the Clogrenan Formation (County Carlow), Carganamuck Limestone Formation (County Armagh) and Rockdale Limestone Formation (County Tyrone), Tarusian foraminiferal assemblages are recorded in the upper beds of thick limestone successions. Key foraminiferal and algal taxa characterize each assemblage, which have been correlated with equivalent Serpukhovian strata in the north of England and Scotland. A three‐stage evolution is recognized in archaediscid foraminifers: from Neoarchaediscus gregorii, followed by Neoarchaediscus postrugosus form 1, and N. postrugosus form 2, with Neoarchaediscus postrugosus form 1 used to define the base of the Serpukhovian. The recognition of Tarusian and Steshevian foraminiferal assemblages implies that areas of shallow‐water platform carbonate sedimentation in Ireland during the upper Viséan (Brigantian) persisted into the Early Serpukhovian.

show abstract

Miospores from the Brigantian stratotype section at Janny Wood, Cumbria

Cited by 12 publications

References 23 publications

Foraminiferal biostratigraphy of Brigantian-Arnsbergian limestones from eastern Scotland and Northumberland (northeast England)

Foraminiferal biostratigraphy of Brigantian-Arnsbergian limestones from eastern Scotland and Northumberland (northeast England)

A potential global chronostratigraphic boundary for the base of the middle Viséan

Irish Serpukhovian revisited

Contact Info

Product

Resources

About