Devilsbit Mountain, Tipperary, Ireland: Homerian, Ireland
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Acritarch indet. marine palyn
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Edwards et al. 1983 | |||||||||
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Diacrodia indet. marine palyn
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Edwards et al. 1983 | |||||||||
| acritarch | ||||||||||
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Ambitisporites sp. microspore
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Edwards et al. 1983 | |||||||||
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Plantae indet. sterile axis
Haeckel 1866
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Edwards et al. 1983 | |||||||||
| sterile axes, infrequent and fragmentary. | ||||||||||
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? Plantae indet.
Haeckel 1866
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Edwards et al. 1983 | |||||||||
| tubes (ornamented, and smooth types) | ||||||||||
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? Retusotriletes spp. microspore
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Edwards et al. 1983 | |||||||||
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Psilophytopsida
- Psilophytales
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Cooksonia sp. fertile axis
Lang 1937
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cf. Cooksonia cambrensis fertile axis
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Edwards et al. 1983 | 6 specimens | ||||||||
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cf. Cooksonia hemisphaerica fertile axis
Lang 1937
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Edwards et al. 1983 | 1 specimen | ||||||||
| very fragmentary | ||||||||||
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cf. Cooksonia pertoni fertile axis
Lang 1937
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Edwards et al. 1983 | 8 specimens | ||||||||
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Protozoa
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? Sphaerochitina sp.
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Edwards et al. 1983 | |||||||||
| chitinozoan | ||||||||||
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unclassified
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Domasia sp. marine palyn
Downie 1960
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Edwards et al. 1983 | |||||||||
| see common names | ||||||||||
Geography
| Country: | Ireland | County: | County Tipperary |
| Coordinates: | 52.0° North, 7.0° West (view map) | ||
| Paleocoordinates: | 29.2° South, 16.2° West | ||
| Geographic resolution: | outcrop |
Time
| Period: | Silurian | Epoch: | Wenlock |
| Stage: | Homerian | 10 m.y. bin: | Silurian 2 | *Epoch: | Late/Upper Wenlock |
| Key time interval: | Homerian | Zone: | Monograptus ludensis Zone |
| Age range of interval: | 430.5 - 427.4 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Hollyford |
| Stratigraphic resolution: | formation |
Lithology and environment
| Primary lithology: | planar lamination lithified siltstone |
| Secondary lithology: | gray,green lithified mudstone |
| Includes fossils? | Y |
| Lithology description: Rock matrix...a slightly micaceous buff siltstone interlaminated with a grey-green mudstone from which fossils are absent. | |
| Environment: | submarine fan |
| Geology comments: 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... | |
Taphonomy
| Modes of preservation: | adpression,coalified,original carbon |
| Size of fossils: | macrofossils,mesofossils,microfossils |
| Preservation of anatomical detail: | poor |
| Fragmentation: | frequent |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | chemical,mechanical,peel or thin section,field collection |
| Reason for describing collection: | taxonomic analysis |
| Taxonomic list comments:Graptolites such as Monograptus ludensis and M. auctus are found above and below the plant bearing sites; see also Edwards, Feehan and Smith, 1983. | |
Metadata
| Also known as: | Borrisnoe Mountain | ||
| Database number: | 10594 | ||
| Authorizer: | P. Gensel | Enterer: | M. Kotyk |
| Modifier: | P. Gensel | Research group: | paleobotany |
| Created: | 2001-06-05 07:37:14 | Last modified: | 2005-02-16 14:10:49 |
| Access level: | group members | Released: | 2001-06-05 07:37:14 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 3918. | 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] |
Secondary references:
| 3940 | D. Edwards, J. Feehan, and D. G. Smith. 1983. A late Wenlock flora from Co. Tipperary, Ireland. Botanical Journal of the Linnean Society 86:19-36 [P. Gensel/M. Kotyk] |