San Cristóbal quarry (Cretaceous of Paraguay)

Also known as San Juan Bautista

Where: Misiones, Paraguay (26.7° S, 57.2° W: paleocoordinates 27.7° S, 24.5° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Misiones Formation, Aptian (125.0 - 113.0 Ma)

• near top of formation

• bed-level stratigraphic resolution

Environment/lithology: coarse channel fill; fine-grained, medium, hematitic siltstone and red, white claystone

• "The lithological profile consists of reddish sandstone, solid at the top, with planar and tangential cross-stratified sandstone with 20-35° inclination. The grain is fine to medium, with well rounded or subrounded clasts with little hematític matrix. They are partly silicified by intrusions of totally altered dikes, mainly melanephelinite, and phonolites, and tephrites, with white and reddish clays. The mineralogy of the sandstones is 90% quartz and 10% feldepaths. The strata have faulting with preferential northwest-southeast, north-south direction."

Size class: macrofossils

Preservation: cast, trace

Collection methods: salvage,

Primary reference: S. de Valais, V. Filippi, S. Molinas and R. Souberlich. 2012. Descripción de una huella de terópodo de la Formación Misiones: primer fósil mesozoico fidedigno de Paraguay [Description of a theropod footprint from the Misiones Formation: first reliable Mesozoic fossil from Paraguay]. Andean Geology 39(3):541-547 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 138677: authorized by Matthew Carrano, entered by Matthew Carrano on 25.01.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

 Saurischia -
Theropoda indet. Marsh 1881 theropod