ammonites
Bayn Dzak, site 2 (PMPE) (Cretaceous of Mongolia)

Also known as Polish-Mongolian Palaeontological Expeditions 2/3

Where: Omnogov, Mongolia (44.2° N, 103.7° E: paleocoordinates 41.8° N, 92.7° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Bayn Dzak Member (Djadokhta Formation), Late/Upper Campanian (83.5 - 70.6 Ma)

• one 10-m thick bed

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; poorly lithified, concretionary, brown, red, calcareous sandstone

• "orange to moderate reddish-brown sands, containing scattered small reddish-brown sandstone nodules, known as 'concretions'. The sands have practically no cement. The cement of the nodules is calcareous...The known thickness of this layer is about 10 metres. The sands are particularly unresistant to weathering because of their poor cementation. Locally thin layers of hard, cemented orange-pink sandstone occur within this horizon, in the Main Mammal Field"

Size class: macrofossils

Preservation: concretion

Collected by PMPE II-III in 1964-1965

Collection methods: quarrying, mechanical,

Primary reference: Z. Kielan-Jaworowska and K. Kowalski. 1965. Polish-Mongolian Palaeontological Expeditions to the Gobi Desert in 1963 and 1964. Bulletin de l'Académie Polonaise des Sciences, Cl. II 13(3):175-179 [M. Carrano/M. Carrano/M. Carrano] more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 37013: authorized by Matt Carrano, entered by Matt Carrano on 23.02.2004