Lui Tai, Yixian (IVPP) (Cretaceous to of China)

Where: Liaoning, China (41.5° N, 121.2° E: paleocoordinates 44.3° N, 123.1° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Lujiatun Member (Yixian Formation), Late/Upper Barremian to Late/Upper Barremian (130.0 - 122.5 Ma)

• radiometric dating of main fossiliferous tuff (40Ar/39AR) = 123.2 ± 1.0 Ma

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; pebbly, volcaniclastic, brown, red, silty, sandy mudstone

• interpreted as a lahar, but host setting not described (other than low-slope, some distance from volcano)
• "The sediment consists of massive, reddish brown (iron oxide-rich), sandy to pebbly mudstone matrix (Text-fig. 2A–B). Grains, granules and pebbles in the mudstone are matrix-supported and consist primarily of volcanic rock fragments (VRF) composed of quartz, plagioclase, volcanic glass and mica (Text-fig. 2A, C), with secondary sedimentary rock fragments (SRF) containing large proportions of VRF and fresh to corroded euhedral grains of plagioclase, quartz and biotite (Text-fig. 2A, D). The VRF and

•SRF also comprise the largest clasts and are up to 5 mm in maximum diameter. Silt to sand-sized grains (0.05– 1.00 mm) of euhedral to subangular, fresh to corroded quartz, plagioclase, potassium feldspar and biotite are also present throughout the matrix."

Size class: macrofossils

Reposited in the IVPP

Collection methods: surface (in situ), mechanical,

Primary reference: Q. Zhao, P. M. Barrett, and D. A. Eberth. 2007. Social behaviour and mass mortality in the basal ceratopsian dinosaur Psittacosaurus (Early Cretaceous, People's Republic of China). Palaeontology 50(5):1023-1029 [M. Carrano/M. Carrano]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 75472: authorized by Matthew Carrano, entered by Matthew Carrano on 10.10.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Ornithischia -
Psittacosaurus lujiatunensis
Psittacosaurus lujiatunensis Zhou et al. 2006 ceratopsian
IVPP V14341