Stengärde, Railway Section, 300 m north of RR station. (Ordovician of Sweden)

Where: Jamtland, Sweden (63.0° N, 14.6° E: paleocoordinates 24.2° S, 7.6° W)

• outcrop-level geographic resolution

When: Kogsta Formation, Hirnantian (445.2 - 443.4 Ma)

• Fig. 2B

• group of beds-level stratigraphic resolution

Environment/lithology: offshore shelf; lithified siltstone and lithified, black, gray shale

• The Kogsta Siltstone was deposited in an offshore environment. The upward increase of silt and the appearance of primary sedimentary structures indicate a minor increase in depositional energy, reflecting a slight shallowing.
• The Kogsta Siltstone consists of dark grey to black shale interbedded with thin to medium bedded siltstones.

Size class: macrofossils

Collection methods: Partly from previously unpublished lists by Bassett & Karis.

Primary reference: P. Dahlqvist, D. A. T. Harper, and L. Wickström. 2010. Late Ordovician shelly faunas from Jämtland: palaeocommunity development along the margin of the Swedish Caledonides. Bulletin of Geosciences 85(3):505-512 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 153329: authorized by Pete Wagner, entered by Pete Wagner on 10.12.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

• Reference samples are stored at the Department of Geology, Lund University, Sweden.
Show authors, comments, and common names
Pterobranchia
 Graptoloidea - Climacograptidae
Climacograptus cf. indivisus
Lingulata
 Lingulida - Discinidae
Orbiculoidea concentrica
Orbiculoidea concentrica Wahlenberg 1821
Rhynchonellata
 Orthida - Draboviidae
Hirnantia sagittifera
Strophomenata
 Strophomenida - Rafinesquinidae
Leptaena rugosa
Leptaena rugosa Dalman 1828
 Orthotetida - Triplesiidae
Cliftonia aff. psittacina
Cliftonia aff. psittacina Wahlenberg 1821
Trilobita
 Phacopida - Dalmanitidae
"Dalmanitina (Mucranopsis) mucronata" = Mucronaspis (Songxites) mucronatus
"Dalmanitina (Mucranopsis) mucronata" = Mucronaspis (Songxites) mucronatus Brongniart 1822 trilobite
 Phacopida - Homalonotidae
Brongniartella platynota
Brongniartella platynota Dalman 1828 trilobite
 Trinucleida - Trinucleidae
Tretaspis sp.
Tretaspis sp. M'Coy 1849 trilobite