Also known as SCDP site 1, site K, AMNH quarry 141, Johnson's Quarry

Where: Nei Mongol, China (43.7° N, 112.2° E: paleocoordinates 43.0° N, 100.8° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Iren Dabasu Formation, Middle Campanian to Middle Campanian (83.5 - 70.6 Ma)

• The Iren Dabasu Formation is Middle–Late Campanian according to Xing et al. 2012

• bed-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; lithology not reported

Size class: macrofossils

Collected by A. F. Johnson in 1922-1928; reposited in the AMNH

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

• probably also visited by 1959 Sino-Soviet Paleontological Expedition

Primary reference: H. F. Osborn. 1922. Discovery of Cretaceous and older Tertiary strata in Mongolia. Science 56(1446):291-293 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 48933: authorized by Matthew Carrano, entered by Matthew Carrano on 04.04.2005

Creative Commons license: CC BY (attribution)