Gotland, carbonate mounds (Ordovician of Sweden)

Also known as Reef 1739

Where: Sweden (57.8° N, 18.9° E: paleocoordinates 30.0° S, 3.7° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Klasen Formation, Ashgill (449.5 - 443.7 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified reef rocks and lithified wackestone

• More than 100 mounds dominated by algae and stromatolites. 10-25 m thick and 200-800 m in diameter. Mound facies: algal packstone/boundstone interbedded with wackestones, cap and flank facies: packstones and wackestones, sub and supra mound facies: lime mudstones and wackestones.

Size class: macrofossils

Collection methods: core,

Primary reference: U. Sivhed, M. Erlström, J. A. Bojesen-Koefoed and A. Löfgren. 2004. Upper Ordovician carbonate mounds on Gotland, central Baltic Sea: distribution, composition and reservoir characteristics. Journal of Petroleum Geology 27(2):115-140 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 80782: authorized by Wolfgang Kiessling, entered by Uta Merkel on 08.05.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• Fossils from mound and sub-mound facies.
unclassified
  -
Ostracoda
  -
Ostracoda indet. Latreille 1802 ostracod
Lingulata
 Acrotretida - Scaphelasmatidae
Scaphelasma sp. Cooper 1956
 Acrotretida - Eoconulidae
Eoconulus sp. Cooper 1956
 Siphonotretida - Siphonotretidae
Acanthambonia sp. Cooper 1956
Polychaeta
 Eunicemorpha -
Bivalvia
  -
Bivalvia indet. Linnaeus 1758 clam
Gastropoda
 Pleurotomariida -
"Pleurotomariacea indet." = Pleurotomarioidea
"Pleurotomariacea indet." = Pleurotomarioidea Swainson 1840 snail
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
Conodonta
 Panderodontida - Panderodontidae
Panderodus gracilis Branson and Mehl 1933 conodont
unclassified
  -
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
Hexactinellida
  -
Hexactinellida indet. Schmidt 1870 glass sponge
Rhizopodea
  -