Cal Orcko tracksite (Cretaceous of Bolivia)

Where: Chuquisaca, Bolivia (19.0° S, 65.3° W: paleocoordinates 21.6° S, 51.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: El Molino Formation (Upper Puca Group), Maastrichtian (72.1 - 66.0 Ma)

• ttracks at at least seven stratigraphic levels

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine - small; sandy limestone and sandstone

• "alkaline perennial and ephemeral lakes with stromatolites"; "mosaic of lacustrine and marginal lacustrine facies...;ake basin was shallow, with high productivity and significant evaporation, leading to fluctuating (lowering) of lake levels."
• "sandy limestone bedding plane."

Size class: macrofossils

Preservation: trace

Collected in the 1980s

Collection methods: surface (in situ),

Primary reference: M. G. Lockley, A. S. Schulp, C. A. Meyer, G. Leonardi, and D. K. Mamani. 2002. Titanosaurid trackways from the Upper Cretaceous of Bolivia: evidence for large manus, wide-gauge locomotion and gregarious behaviour. Cretaceous Research 23:383-400 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 36234: authorized by Matthew Carrano, entered by Matthew Carrano on 19.01.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Saurischia - Titanosauridae
Titanosauridae indet. Lydekker 1885 titanosaurid
 Theropoda -
Theropoda indet. theropod
larger forms
Theropoda indet. theropod
small forms
 Ornithischia -
Ankylosauria indet. ornithischian
 Neornithischia -
Ornithopoda indet. bird foot dinosaur