Subeng Unit 2 (Paleocene of China)

Where: Nei Mongol, China (43.5° N, 111.7° E: paleocoordinates 44.3° N, 102.2° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Nomogen Formation, Paleocene (66.0 - 56.0 Ma)

• apparently from throughout a unit about 11 m thick

• member-level stratigraphic resolution

Environment/lithology: lacustrine; green mudstone and white, yellow limestone

• "freshwater, lacustrine deposits"
• "green mudstones and white to yellowish limestones... [most limestones are] ostracodal packstones... the limestone near the top is... an ostracodal wackestone"; most fossils are from the limestones, but the "mudstones yield a similar fossil content"

Size classes: mesofossils, microfossils

Primary reference: J. Van Itterbeeck, P. Missiaen, A. Folie, V. S. Markevich, D. Van Damme, D.-Y. Guo, and T. Smith. 2007. Woodland in a fluvio-lacustrine environment on the dry Mongolian Plateau during the late Paleocene: Evidence from the mammal bearing Subeng section (Inner Mongolia, P.R. China). Palaeogeography, Palaeoclimatology, Palaeoecology 243(1-2):55-78 [J. Alroy/J. Alroy/M. Carrano]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 71074: authorized by John Alroy, entered by John Alroy on 17.04.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Besides ostracods and charophytes, this layer also has yielded numerous gastropods but the vertebrate content is limited to rare fish teeth"
unclassified
  -
Quercites
  -
Ginkgocycadophytus
  -
Ginkgocycadophytus sp. Samoilovitch 1953
Sphagnaceae
  - Sphagnaceae
Alisporites
  -
Cedripites
  -
Equisetopsida
 Pinidae - Pinidae
Classopollis sp. Pflug 1953
 Anthophyta -
Ginkgoopsida
 Ephedrales -
Ephedripites sp. Bolkhovitina and Potonié 1958
Magnoliopsida
  -
Angiospermae
 Gentianales - Rubiaceae
Rubiaceae indet. Jussieu 1789 coffee
 Proteales - Proteaceae
 Gunnerales -
Tricolpites sp. Couper 1953
 Fagales - Juglandaceae
Caryapollenites sp. Potonié 1960
 Coniferales -
Pteridopsida
  -
Cyathidites minor Couper 1953
Leiotriletes sp. Potonie and Kremp 1954
Polypodiopsida
  - Polypodiaceae
Laevigatosporites ovatus Wilson and Webster 1946
 Schizaeales - Polypodiidae
Cicatricosisporites dorogensis Potonie and Gelletich 1933
  - Blechnaceae
  - Gleicheniaceae
Plicatopollis plicatus
  -
Plicatopollis plicatus Potonié 1934
Parviprojectus
  -
Parviprojectus sp. Mtchedlishvili 1961