Yanguoxia, main site (sites 1 & 2), LDNG (Cretaceous to of China)

Also known as Liujiaxia Dinosaur National Geopark sites I, II

Where: Gansu, China (36.1° N, 103.3° E: paleocoordinates 36.5° N, 105.5° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: 6 Formation (Hekou Group), Barremian to Barremian (129.4 - 113.0 Ma)

• single bedding plane cropping out at both sites, with a second, slightly higher adjacent outcrop

•- also called "Upper Formation", tracks in lower part; 6th informal formation-level

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine - small; fine-grained, gray sandstone

• "fluvio-lacustrine"; "a shallow lake environment"
• "sandstone bedding plane", also "a gray fine sandstone surface...containing sedimentary structures such as ripple marks and polygonal mud cracks"

Size classes: macrofossils, mesofossils

Preservation: mold/impression, trace

Collected in 2000–2004

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

• discovered by workers from the Research Center of Paleontology of the Bureau of Geology and Resource Exploration of Gansu Province

Primary reference: Y.-s. Du, D.-q. Li, B.-x. Peng, R.-l. Lei, and Z.-c. Bai. 2002. [Large-scale sauropod dinosaur footprints from Yanguoxia, Yongjing County, Gansu Province]. Earth Science – Journal of China University of Geosciences 27(4):367-372 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 59255: authorized by Matthew Carrano, entered by Kaitlin Maguire on 21.03.2006, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Ornithischia -
Ornithopoda indet. ornithopod
two types
 Theropoda -
Theropoda indet. theropod
trackways, "type 2"
 Theropoda - Grallatoridae
Grallator sp.1 Hitchcock 1858 theropod
"type 3"
 Theropoda - Dromaeopodidae
Dromaeosauripus yongjingensis n. sp.4 Xing et al. 2013 maniraptoran
"probably dromaeosaurid"; "type 1"
Aves
  - Avipedidae
Avipedidae indet.5 Sarjeant and Langston 1994 bird
Reptilia
 Saurischia -
Sauropoda indet.1 sauropod
possibly swimming tracks
cf. Brontopodus sp.3 Farlow et al. 1989 sauropod
trackways, YSI-S3
 Pterosauria - Pteraichnidae
Pteraichnus yanguoxiaensis n. sp.2 Peng et al. 2004 pterosaur
Single trackway of 12 manus-pes sets