Devilsbit Mountain, Tipperary, Ireland (Silurian of Ireland)

Also known as Borrisnoe Mountain

Where: Ireland (52.0° N, 7.0° W: paleocoordinates 29.2° S, 16.2° W)

• outcrop-level geographic resolution

When: Monograptus ludensis Zone zone, Hollyford Formation, Homerian (430.5 - 427.4 Ma)

• formation-level stratigraphic resolution

Environment/lithology: submarine fan; lithified siltstone and lithified, gray, green mudstone

• Plant bearing beds are found within an extensive inlier of Silurian rocks that extends south-westwards to include Silvermines and Slieve Phelim. The succession, the overall thickness of which is probably in excess of 2,500m, comprises a monotonous succession of turbiditic sandstones, laminated siltstones and mudstones, with very rare microconglomreates and volcanic rocks. The siltstones are frequently fossiliferous, yielding a varied fauna...
• Rock matrix...a slightly micaceous buff siltstone interlaminated with a grey-green mudstone from which fossils are absent.

Size classes: macrofossils, mesofossils, microfossils

Preservation: adpression, coalified, original carbon

Collection methods: chemical, mechanical, peel or thin section,

Primary reference: D. Edwards and J. Feehan. 1980. Records of Cooksonia-type sporangia from late Wenlock strata in Ireland. Nature 287:41-42 [P. Gensel/M. Kotyk]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 10594: authorized by Pat Gensel, entered by Michele Kotyk on 05.06.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

• Graptolites such as Monograptus ludensis and M. auctus are found above and below the plant bearing sites; see also Edwards, Feehan and Smith, 1983.
Show authors, comments, and common names
unclassified
  -
Acritarch indet., Diacrodia indet., Ambitisporites sp.
Diacrodia indet.
acritarch
 Life -
Domasia sp.
Domasia sp. Downie 1960 acritarchs
unclassified
  -
Plantae indet., ? Plantae indet.
Plantae indet. Haeckel 1866
sterile axes, infrequent and fragmentary.
? Plantae indet. Haeckel 1866
tubes (ornamented, and smooth types)
Psilophytopsida
 Psilophytales -
Cooksonia sp., cf. Cooksonia cambrensis, cf. Cooksonia pertoni, cf. Cooksonia hemisphaerica
Cooksonia sp. Lang 1937
cf. Cooksonia hemisphaerica Lang 1937
very fragmentary
Retusotriletes
  -
? Retusotriletes spp.
? Retusotriletes spp. Naumova 1953
Protozoa
  -
? Sphaerochitina sp.