Exposure 42, Bed 6, Lopsiya River (Eastern slope of the Subpolar Urals) (Jurassic of Russian Federation)

Where: Siberia, Russian Federation (62.5° N, 60.3° E: paleocoordinates 58.5° N, 56.7° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Early/Lower Kimmeridgian (155.7 - 150.8 Ma)

• Kimmeridgian Stage, Lower Substage, Rasenia evoluta Zone, Eurasenia pseudouralensis Subzone;

•thickness: >15 m

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, gray claystone

• The explored Kimmeridgian section denuded along the Lopsiya River formed under the embayment conditions of an epicontinental West Siberian sea, covering the territory of more than 2 mln km^2. This Lyapinsky Bay was rather shallow and opened toward the NNE. The narrow band of the Uralian Peninsula seperated it from the Timon-Pechora Sea in the west, and the small Berezovsky Archipelago seperated it from the West Siberian Sea in the east.
• Dark-gray fine-lumpy plastic clays. Large calcareous septarian concretions are found throughout the bed. In places, pyrite grains occur.

Size class: macrofossils

Primary reference: V. A. Zakharov, F. Baudin, O. S. Dzyuba, V. Daux, K. V. Zverev and M. Renard. 2005. Isotopic and faunal record of high paleotemperatures in the Kimmeridgian of Subpolar Urals. Russian Geology and Geophysics 46(1):3-20 [M. Aberhan/S. Nurnberg]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 58775: authorized by Martin Aberhan, entered by Sabine Nürnberg on 24.02.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Gastropoda
 Cerithioidea - Turritellidae
Turritella sp.
Turritella sp. turret shell
 Pleurotomarioidea - Pleurotomariidae
Pleurotomaria sp.
Pleurotomaria sp. Defrance 1826 snail
Bivalvia
 Arcida - Parallelodontidae
Cosmetodon cf. keyserlingi
 Arcida - Cucullaeidae
Dicranodonta sp.
Dicranodonta sp. Woods 1899 clam
 Ostreida - Malleidae
Isognomon sp.
Isognomon sp. Lightfoot 1786 oyster
 Ostreida - Bakevelliidae
Gervillia sp.
Gervillia sp. Defrance 1820 oyster
 Ostreida - Pinnidae
Pinna sp.
Pinna sp. Linnaeus 1758 oyster
 Pectinida - Pectinoidae
Camptonectes (Camptonectes) sp.
 Pectinida - Limidae
"Limatula cf. consobrina" = Lima (Limatula) consobrina
"Limatula cf. consobrina" = Lima (Limatula) consobrina d'Orbigny 1845 file clam
 Pectinida - Oxytomidae
Oxytoma (Oxytoma) sp.
Oxytoma (Oxytoma) sp. Meek 1864 scallop
 Pectinida - Buchiidae
Buchia concentrica
Buchia concentrica White 1888 scallop
 Mytilida - Mytilidae
Modiolus sp.
Modiolus sp. Lamarck 1801 mussel
 Trigoniida - Trigoniidae
Trigonia sp.
Trigonia sp. Bruguière 1789 clam
 Carditida - Astartidae
Astarte (Astarte) lyapinensis
Astarte (Astarte) lyapinensis clam
A. (A.) lyapinensis toliyaensis
 Cardiida - Cardiidae
Protocardia sp.
Protocardia sp. Beyrich 1845 cockle
 Cardiida - Solecurtidae
Solecurtus sp.
Solecurtus sp. Blainville 1824 clam
 Pholadida - Ceratomyidae
Myopholas sp.
Myopholas sp. Douvillé 1908 clam
Cephalopoda
 Belemnitida -
Pachyteuthis (Boreioteuthis) absoluta, Pachyteuthis (Pachyteuthis) panderiana, Pachyteuthis (Boreioteuthis) troslayana
Pachyteuthis (Boreioteuthis) troslayana d'Orbigny 1850 belemnite
 Goniatitida - Prionoceratidae
Amoeboceras (Amoebites) kitchini
Amoeboceras (Amoebites) kitchini Salfeld 1915 ammonite
 Ammonitida - Aulacostephanidae
Prorasenia bowerbanki
Prorasenia bowerbanki Spath 1935 ammonite
 Ammonitida - Perisphinctidae
Rasenia (Rasenia) inconstans, Rasenia (Rasenia) laevigata, Rasenia (Rasenia) coronata, Rasenia (Rasenia) suburalensis, Zonovia (Zonovia) ilovaiskii
Rasenia (Rasenia) inconstans Spath 1935 ammonite
Rasenia (Rasenia) laevigata Mesezhnikov 1984 ammonite
Rasenia (Rasenia) coronata Mesezhnikov 1969 ammonite
Rasenia (Rasenia) suburalensis Spath 1925 ammonite
Zonovia (Zonovia) ilovaiskii Sasonov 1960 ammonite