Cape Urdyuk-Khaya-12 (Cretaceous of Russian Federation)

Where: Siberia, Russian Federation (73.0° N, 113.0° E: paleocoordinates 75.1° N, 91.4° E)

• small collection-level geographic resolution

When: Neotollia klimovskiensis zone, XVII Member, Valanginian (139.8 - 132.9 Ma)

• exposure 33, layers 52-60

• member-level stratigraphic resolution

Environment/lithology: marine; gray, silty claystone

• five persistent concretional intercalations of flattened lens-like or loaf-like clayey limestone are present

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 2486: authorized by Mark Patzkowsky, entered by Karen Layou on 06.07.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• trace fossils include galleries of mud eaters
Foraminifera
 Foraminifera -
  -
? Orietalia baccula
originally entered as "Orientalia? baccula"
 Ammodiscoidea - Ammodiscidae
 Lituolacea - Ammosphaeroidinidae
 Lituolida - Haplophragmoididae
ex gr. Haplophragmoides latidorsatus
originally entered as "Haplophragmoides ex gr. latidorsatus"
Haplophragmoides sp. Cushman 1910
 Lituolida - Lituolidae
? Ammobaculites sp. Cushman 1910
originally entered as "Ammobaculites? sp."
  -
"ex gr. Marginulina pyramidalis" = Cristellaria (Marginulina)
"ex gr. Marginulina pyramidalis" = Cristellaria (Marginulina)
originally entered as "Marginulina ex gr. pyramidalis"
Nodosariata
 Vaginulinida - Vaginulinidae
Lenticulina sp. Lamarck 1804
originally entered as "Lenticulina spp."
 Robertinida - Ceratobuliminidae
 Polymorphinida - Polymorphinidae
 Nodosariida - Nodosariidae
Bivalvia
 Nuculida - Nuculidae
Nucula sp. Lamarck 1799 nut clam
 Pectinida - Limidae
Lima sp. Bruguière 1797 file clam
 Pectinida - Buchiidae
Buchia sp. Rouillier 1845 scallop
 Pectinida - Oxytomidae
Oxytoma sp. Meek and Hayden 1865 scallop
Gastropoda
 Vanikoroidea - Eulimidae
? Eulima sp. Risso 1826 snail
originally entered as "Eulima? sp."
Cephalopoda
 Ammonitida - Polyptychitidae
"? Tollia sp." = Tollia, "aff. Neotollia klimovskiensis" = Tollia
"? Tollia sp." = Tollia Pavlow 1914 ammonite
originally entered as "Tollia? sp."
"aff. Neotollia klimovskiensis" = Tollia ammonite
originally entered as "Neotollia aff. klimovskiensis"
 Belemnitida - Belemnitidae