Amtgai, northern cliffs [HMNS-GIN] (Cretaceous to of Mongolia)

Also known as Amtgay

Where: Omnogov, Mongolia (43.6° N, 107.9° E: paleocoordinates 45.5° N, 98.3° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Baynshire Formation, Cenomanian to Cenomanian (100.5 - 83.6 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; sandstone and mudstone

• "In the cliffs it was possible to measure paleocurrent on trough cross-stratification on the top of hard sand stone layers. The direction of the current is estimated to be SE, and NE - SW."; "Lithology of fossil-bearing Mesozoic beds is alternation of sandstone and mudstone layers, with fluvial origin. Paleocurrent direction on trough cross-stratification of the beds is very variable (but, dominantly NE, SE, and SW)"

Size class: macrofossils

Collected by HMNS-GIN in 2001, 2004

Collection methods: surface (float), surface (in situ), mechanical,

Primary reference: M. Watabe, K. Tsogtbaatar, N. Ichinnorov and R. Barsbold. 2004. Report on the Japan-Mongolia Joint Paleontological Expedition to the Gobi desert, 2001. Hayashibara Museum of Natural Sciences Research Bulletin 2:69-96 [R. Benson/R. Benson]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 137857: authorized by Roger Benson, entered by Roger Benson on 28.12.2012, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Theropoda -
Theropoda indet.1, Theropoda indet.2
Theropoda indet.1 Marsh 1881 theropod
040802 AMG-N Tsui
Theropoda indet.2 Marsh 1881 theropod
010725 AMT-N; In the foot of the badland, a large scapula of dinosaur was found. The coracoid was missing in the scapula, however, the relative size of the coracoid to the scapula is estimated as disproportionally large. The morphology of the scapula is close to that of therizinosaurid
 Theropoda - Deinocheiridae
? Deinocheirus sp.1
? Deinocheirus sp.1 Kielan-Jaworowska 1969 ornithomimosaur
ulna, 040802 AMG-N Tsui
unclassified
  -
Mollusca indet.3
Mollusca indet.3 Linnaeus 1758
1Suzuki et al. 2010; 2Tsogtbaatar and Chinzorig 2010; 3Watabe et al. 2010