Nyhamn (Silurian of Sweden)

Where: Gotland, Sweden (57.8° N, 18.4° E: paleocoordinates 23.9° S, 3.4° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Pterospathodus amorphognathoides conodont zone, Lower Visby Formation, Telychian (438.5 - 433.4 Ma)

• Members a-b possible

• group of beds-level stratigraphic resolution

Environment/lithology: offshore ramp; lithified, gray, blue marl and lithified, pyritic, gray limestone

• 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; "The Lower Visby Beds consist of micritic limestones and marls, without transported and sorted detrital material, accumulated well below the wave base and photic zone; only weak water movements touched the bottom."
• ...thin bedded, rather soft marlstone of bluish grey colour, which alternates with harder marly limestone which is dense to finely crystalline, light grey in colour, and which often contains crystals of pyrite. This limestone occurs partly as thin layers of restricted horizonal extension and partly as knolls or thin lenses...The limestone layers are 1-4 cm thick, but with a majority in the group of 1-2 cm thickness. The marl layers are 2-10 cm thick. (Manten 1971, p. 278)

Size class: macrofossils

Reposited in the SM

Primary reference: O. A. Hoel. 2005. Silurian Leptaeninae (Brachiopoda) from Gotland, Sweden. Paläontologische Zeitschrift 79(2):263-284 [W. Kiessling/M. Krause]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 169860: authorized by Pete Wagner, entered by Pete Wagner on 02.06.2015, edited by Björn Kröger

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Strophomenata
 Strophomenida - Rafinesquinidae
"Leptaena depressa" = Leptaena (Leptaena) depressa
"Leptaena depressa" = Leptaena (Leptaena) depressa Sowerby 1824
Leptaena depressa visbyensis
 Strophomenida - Furcitellidae
Cyphomenoidea wisgoriensis
Cyphomenoidea wisgoriensis Lamont and Gilbert 1945