Cape Urdyuk-Khaya-2 (Jurassic of Russian Federation)

Where: Siberia, Russian Federation (73.0° N, 113.0° E: paleocoordinates 76.0° N, 91.7° E)

• outcrop-level geographic resolution

When: Crespedites taimyrensis zone, VII Member, Tithonian (152.1 - 145.0 Ma)

• exposure 33, layers 15-16; exposure 32, layers 8-9

• member-level stratigraphic resolution

Environment/lithology: marine; gray, silty claystone

• lithology is a silty, platy, laminated grey-brown clay, with calcareous phosphatic rounded concretions found in the upper part of the member

Size class: macrofossils

Primary reference: V. N. Saks, ed. 1975. The Jurassic-Cretaceous Boundary and the Berriasian Stage in the Boreal Realm. 1-319 [M. Patzkowsky/K. Layou/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 2476: authorized by Mark Patzkowsky, entered by Karen Layou on 06.07.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• trace fossils include "many galleries of mud eaters"
Malacostraca
 Decapoda -
Decapoda indet. Latreille 1802 decapod
Bivalvia
 Pectinida - Limidae
Lima sp. Bruguière 1797 file clam
 Pectinida - Buchiidae
aff. Buchia subinflata scallop
originally entered as "Buchia aff. subinflata"
cf. Buchia fischeriana d'Orbigny 1845 scallop
originally entered as "Buchia cf. fischeriana"
 Pectinida - Pectinoidae
Pectinidae indet. Wilkes 1810 scallop
 Nuculida - Nuculidae
Nucula sp. Lamarck 1799 nut clam
Cephalopoda
 Belemnitida - Cylindroteuthididae
 Ammonitida - Polyptychitidae
ex gr. Subcraspedites bidevexus ammonite
originally entered as "Subcraspedites ex gr. bidevexus"
Craspedites candadensis ammonite
Craspedites canadensis candadensis
Craspedites pseudosubditus ammonite
Craspedites canadensis pseudosubditus
aff. Craspedites pseudosubditus ammonite
Craspedites canadensis aff. pseudosubditus - originally entered as "Craspedites aff. pseudosubditus"
Foraminifera
 Lagenina - Ichthyolariidae
cf. Geinitzinita arctocretacea
originally entered as "Geinitzinita cf. arctocretacea"
Nodosariata
 Nodosariida - Nodosariidae
? Dentalina sp. d'Orbigny 1826
originally entered as "Dentalina? sp."
 Vaginulinida - Vaginulinidae
? Saracenaria vermis
originally entered as "Saracenaria? vermis"
Lenticulina sp. Lamarck 1804
originally entered as "Lenticulina spp."
Foraminifera
  -
? Orietalia baccula
originally entered as "Orientalia? baccula"
 Lituolacea - Ammosphaeroidinidae
ex gr. Recurvoides obskiensis
originally entered as "Recurvoides ex gr. obskiensis"
 Ammodiscoidea - Ammodiscidae
 Trochamminacea - Trochamminidae
ex gr. Trochammina rosaceaformis
originally entered as "Trochammina ex gr. rosaceaformis"
  -
"Marginulina pyramidalis" = Cristellaria (Marginulina), "Marginulina subformosa" = Cristellaria (Marginulina)
"Marginulina pyramidalis" = Cristellaria (Marginulina)
"Marginulina subformosa" = Cristellaria (Marginulina)
 Lituolida - Haplophragmoididae