Sundre Beds: Fossils of Holmhallar-type reef limestone (Manten 1971, Table IX) (Silurian of Sweden)

Also known as Reef 3730

Where: Gotland, Sweden (57.5° N, 18.4° E: paleocoordinates 16.5° S, 2.4° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Sundre Beds Formation, Ludfordian (425.6 - 423.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; shelly/skeletal grainstone and reef rocks

• SEP: Silurian of Gotland has been variably described as a ramp and platform. Based on my read of the literature, I think if falls best into the ramp category. From Samtleben et al. (1996). Geol. Rundsch 85:278-292; "...a series of massive bioherms surrounded and covered by detritic and coarse crinoidal limestones (Sundre Beds). To the northeast, these platform deposits are replaced by micritic and argillaceous limestones with back reef character and often with an impoverished benthic fauna."

•I have assumed that these collections are from near Hoburgen and are therefore from the biohermal and crinoidal limestones."

• see geology

Primary reference: A. A. Manten. 1971. Silurian Reefs of Gotland. Developments in Sedimentology 13:1-539 [M. Foote/M. Foote/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 13622: authorized by Michael Foote, entered by Michael Foote on 16.04.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
  -
Trilobita indet. Walch 1771 trilobite
 Phacopida - Calymenidae
 Proetida - Proetidae
Ostracoda
 Palaeocopida -
Brachiopoda
  -
Brachiopoda indet. Cuvier 1805
Strophomenata
 Strophomenida - Strophomenidae
Strophomena orbignyi
"Strophomena" orbignyi Davidson
Rhynchonellata
 Atrypida - Atrypidae
Atrypa phoca
"Atrypa" phoca Salter
 Orthida - Hesperorthidae
Dolerorthis rustica Sowerby 1839
Cephalopoda
  -
Cephalopoda indet. Cuvier 1797
 Orthocerida -
 Orthocerida - Orthoceratidae
Orthoceras sp. Breynius 1832
 Ascocerida - Ascoceratidae
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
Stromatoporoidea
 Stromatoporoidea -
 Stromatoporida - Stromatoporidae
 Labechiida - Labechiidae
Labechia conferta Lonsdale 1839
Anthozoa
  -
Anthozoa indet. Ehrenberg 1834
 Favositida - Alveolitidae
Planalveolites fougti tabulate coral
 Favositida - Coenitidae
Coenites repens tabulate coral
 Algae -