"dinosaur" sinkhole (reworked) (Cretaceous of Bulgaria)

Where: Pleven, Bulgaria (43.2° N, 24.0° E: paleocoordinates 30.2° N, 21.6° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Kajlâka Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• late Maastrichtian is youngest possible age for reworked bone

• bed-level stratigraphic resolution

Environment/lithology: coastal; sandy limestone and sandy wackestone

• "The sediment stuck to the described bone, is a sandy limestone (60% carbonate, 40% clastic grains and clay minerals), the matrix is represented by micritic calcite. The clastic grain framework is composed by quartz (80%), feldspar (10–15%), mica (5%) and siltstone rock fragments. The detrital grains are angular to sub-angular, poorly sorted with grain size ranging from very fine to medium grained suggesting short transport before deposition. The cement is drusy mosaic calcite filling leached parts from the micritic matrix or depositional voids. Most likely this drusy mosaic cement has a meteoric phreatic origin; as discussed below this sediment suggests deposition and original burying of the bone on the continent but in a near costal zone."

Size class: macrofossils

Collected by Zdravkro in 2005

Primary reference: O. Mateus, G. J. Dyke, N. Motchurova-Dekova, G. D. Kamenov, and P. Ivanov. 2010. The first record of a dinosaur from Bulgaria. Lethaia 43(1):88-94 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 105333: authorized by Matthew Carrano, entered by Matthew Carrano on 19.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Theropoda -
Ornithomimosauria indet.
Ornithomimosauria indet. Barsbold 1976 ornithomimosaur
NMNHS F-31436