Glassia Comm. in the Rukai Beds, Pagegiai Fm., Stoniskiai-R1 Borehole, Lithuania: Ludlow, Lithuania
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Rhynchonellata
- Atrypida
- Lissatrypidae
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Glassia obovata
(Sowerby 1839)
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| recombined as Lissatrypa obovata | |||||||
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Rhynchonellata
- Athyridida
- Dayiidae
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Dayia navicula
(Sowerby 1839)
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| see common names | |||||||
Geography
| Country: | Lithuania |
| Coordinates: | 55.2° North, 21.8° East (view map) |
| Paleocoordinates: | 18.0° South, 0.5° East |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | outcrop |
Time
| Period: | Silurian | Epoch: | Ludlow |
| 10 m.y. bin: | Silurian 2 | ||
| Key time interval: | Ludlow | ||
| Age range of interval: | 427.40000 - 423.00000 m.y. ago |
Lithology and environment
| Primary lithology: | gray marl |
| Secondary lithology: | lime mudstone |
| Includes fossils? | Y |
| Lithology description: "Widespread in dark-gray and gray marls with microcrystalline limestone interbeds of the fourth facies zone. The strata are chiefly unlaminated except at the boundary beteen black argillites and dark-gray argillaceous marls. The laminated beds rarely yield benthos, wehreas the G. Comm. is common in the unlaminated marls." | |
| Environment: | marine indet. |
| Geology comments: "[Lithology and occurrence] suggestive of this community being dysaerobic rather than representing a normal, aerobic environment. The fauna is consistent with a BA 4-5 assignment, as is the presence of graptolites...Deposition of dark-gray and gray marls in Lithuania took place under lowered oxygen conditions well below wave base..These data also indicate...BA 4-5." | |
Taphonomy
Collection methods and comments
| Reason for describing collection: | paleoecologic analysis |
Metadata
| Database number: | 26283 | ||
| Authorizer: | M. Foote | Enterer: | M. Foote |
| Modifier: | M. Foote | Research group: | marine invertebrate |
| Created: | 2002-10-11 09:27:38 | Last modified: | 2006-09-15 15:14:05 |
| Access level: | the public | Released: | 2002-10-11 09:27:38 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 6146. | P. Musteikis and J. J. Paskevicius. 1999. Brachiopod communities of the Lithuanian Silurian. In A. J. Boucot, J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 305-326 [M. Foote/M. Foote/P. Wagner] |