Cape Urdyuk-Khaya-10 (Cretaceous of Russian Federation)

Where: Siberia, Russian Federation (73.0° N, 113.0° E: paleocoordinates 75.5° N, 91.9° E)

• small collection-level geographic resolution

When: Bojarkia mesezhnikowi zone, XV Member, Berriasian (145.0 - 139.8 Ma)

• exposure 33, layers 39-44

• member-level stratigraphic resolution

Environment/lithology: marine; gray, silty shale

• many loaf-shaped concretions of clayey, sometimes sideritized grey limestone within 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 2484: 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
  -
? Orietalia baccula
originally entered as "Orientalia? baccula"
 Trochamminacea - Trochamminidae
 Ammodiscoidea - Ammodiscidae
 Lituolacea - Ammosphaeroidinidae
 Lituolida - Haplophragmoididae
ex gr. Haplophragmoides schleiferi
originally entered as "Haplophragmoides ex gr. schleiferi"
Haplophragmoides sp. Cushman 1910
 Lituolida - Lituolidae
aff. Ammobaculites gerkei
originally entered as "Ammobaculites aff. gerkei"
Ammobaculites sp. Cushman 1910
originally entered as "Ammobaculites spp."
  -
"Marginulina pyramidalis" = Cristellaria (Marginulina), "ex gr. Marginulina robusta" = Cristellaria (Marginulina), "Marginulina impropria" = Cristellaria (Marginulina)
"Marginulina pyramidalis" = Cristellaria (Marginulina)
"ex gr. Marginulina robusta" = Cristellaria (Marginulina)
originally entered as "Marginulina ex gr. robusta"
"Marginulina impropria" = Cristellaria (Marginulina)
Nodosariata
 Vaginulinida - Vaginulinidae
aff. Lenticulina modica
originally entered as "Lenticulina aff. modica"
Saracenaria sp. Defrance 1824
 Nodosariida - Nodosariidae
aff. Astacolus trigonius
originally entered as "Astacolus aff. trigonius"
Bivalvia
 Nuculida - Nuculidae
Nucula sp. Lamarck 1799 nut clam
 Pectinida - Buchiidae
cf. Buchia inflata Toula 1888 scallop
originally entered as "Buchia cf. inflata"
ex gr. Buchia volgensis Lahusen 1888 scallop
originally entered as "Buchia ex gr. volgensis"
 Pectinida - Oxytomidae
Gastropoda
 Vanikoroidea - Eulimidae
? Eulima sp. Risso 1826 snail
originally entered as "Eulima? sp."
Cephalopoda
 Ammonitida - Polyptychitidae
cf. Tollia emeljanzevi ammonite
originally entered as "Tollia cf. emeljanzevi"
Tollia subtilis ammonite
"cf. Tollia tolli" = Tollia (Tollia) tolli Pavlow 1914 ammonite
originally entered as "Tollia cf. tolli"