Hamra Beds: Fossils of Hoburgen-type reef limestone (Manten 1971, Table IX) (Silurian of Sweden)
Also known as Reef 1800
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: Hamra Beds Formation, Ludfordian (425.6 - 423.0 Ma)
• group of beds-level stratigraphic resolution
Environment/lithology: reef, buildup or bioherm; limestone and reef rocks
• Ref. 11073: "Hamra/Sundre Beds (50m): The oolitic limestones of the upper Burgsvik Beds pass into oncolites with bioclasts of normal marine fauna. At Hoburgen, in the SW part of Gotland, these are overlain by a series of massive bioherms surrounded and covered by detritic and coarse crinoidal limestones (Sundre Beds). To the NE these platform deposits are replaced by micritic and argillaceous limestones with back reef character and often with an impoverished benthic fauna. Southwards, the carbonate platform of Hoburgen passes into a shelf basin area with the deposition of a limestone-marl sequence which then grades into off-reef shelf sediments ("Beyrichia Limestone") south of Gotland."
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 13620: authorized by Michael Foote, entered by Michael Foote on 16.04.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
unclassified | |
Crinoidea | |
Crinoidea indet. Miller 1821 Sea lily | |
Stenolaemata | |
Fistulipora sp. McCoy 1850 | |
Rhynchonellata | |
"Camarotoechia nucula" = Microsphaeridiorhynchus nucula
"Camarotoechia nucula" = Microsphaeridiorhynchus nucula Sowerby 1839 | |
Eospirifer sp. Schuchert 1913 | |
Linoporella punctata deVerneuil 1848 | |
Dolerorthis rustica Sowerby 1839
Ptychopleurella bouchardi Davidson 1847 | |
Anastrophia deflexa Sowerby 1839 | |
Strophomenata | |
| |
Tentaculita | |
"Autodetus calyptratus" = Anticalyptraea
"Autodetus calyptratus" = Anticalyptraea | |
Gastropoda | |
"Poleumita globosum" = Oriostoma globosum
"Poleumita globosum" = Oriostoma globosum von Schlotheim 1820 snail | |
Platyceras disciforme Lindström 1884 snail | |
Cephalopoda | |
Cephalopoda indet. Cuvier 1797 | |
Orthoceras sp. Breynius 1832 | |
Paragastropoda | |
"Oriostoma contrarium" = Onychochilus contrarium
"Oriostoma contrarium" = Onychochilus contrarium Lindström 1884 | |
Anthozoa | |
Anthozoa indet. Ehrenberg 1834 | |
Cyathophyllum bisectum horn coral | |
Acervularia ananas horn coral
Acervularia sp. Schweigger 1819 horn coral | |
Favosites sp. Lamarck 1816 tabulate coral
Favosites gothlandicus Lamarck 1816 tabulate coral | |
Heliolites interstinctus tabulate coral
Heliolites sp. Dana 1846 tabulate coral
Heliolites barrandei Penecke 1887 tabulate coral | |
Propora conferta tabulate coral | |
Plasmopora scita tabulate coral | |
Stromatoporoidea | |
Stromatoporoidea indet. stromatoporoid sponge | |
Syringostroma sp. Nicholson 1865 stromatoporoid sponge | |
Stromatoporella sp. Nicholson 1886 stromatoporoid sponge | |
Labechia conferta Lonsdale 1839 stromatoporoid sponge | |
Rothpletzella | |
Rothpletzella sp. Wood 1948 | |
Rhodophyceae | |
Solenopora sp. Dybowski 1877 | |
Algae | |