Glassia Comm. in the Rukai Beds, Pagegiai Fm., Stoniskiai-R1 Borehole, Lithuania (Silurian of Lithuania)

Where: Lithuania (55.2° N, 21.8° E: paleocoordinates 18.0° S, 0.5° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Rukai Member (Pagegiai Formation), Ludlow (427.4 - 423.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; gray marl and lime mudstone

• "[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."
• "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."

Primary reference: 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]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 26283: authorized by Michael Foote, entered by Michael Foote on 11.10.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Athyridida - Dayiidae
Dayia navicula
Dayia navicula Sowerby 1839
 Atrypida - Lissatrypidae
"Glassia obovata" = Lissatrypa obovata
"Glassia obovata" = Lissatrypa obovata Sowerby 1839