28 May 2015

Dinosaurs walking along the lakeshore

Shallow lacustrine deposits from the Barremian Mirambel Formation (Teruel province, Spain) hold some dinosaur tracks which were recently discovered. Here a nice theropod footprint that is sinking the underlying laminated sediments. A first report of this dinosaur track record was presented in this conference paper:

Gasca, J.M., Moreno-Azanza, M., Canudo, J.I., Díaz-Martínez, I., Castanera, D., Ramón del Río, D. 2013. Dinosaur fossil sites from Ladruñán anticline (Mirambel Formation, Early Cretaceous, Teruel, Spain): tracks and bonebeds. In: VI Jornadas Internacionales sobre Paleontología de Dinosaurios y su entorno, Abstract Book (F. Torcida Fernández-Baldor & P. Huerta, eds.), pp. 74-75. DOWNLOAD HERE

13 May 2015

Mineral treasures within fossil bones

This is a spectacular example of calcite crystals growing within the centrum of a theropod dinosaur vertebra. The fossil comes from Camino de la Algecira boneded (Teruel, Spain), which is a fossil site where some other striking diagenetic processes have already been described (Bauluz et al., 2014).

Reference:
Bauluz, B., Gasca, J.M., Moreno-Azanza, M., Canudo, J.I. 2014. Unusual replacement of biogenic apatite by aluminium-phosphate phases in dinosaur teeth of Early Cretaceous of Spain. Lethaia, 47, 556-566. DOI: 10.1111/let.12081 (REQUEST PDF HERE)

08 May 2015

Ankylosaur remains

An isolated osteoderm of an ankylosaur from the early Barremian El Castellar Formation, Teruel province. Thyreporan dinosaurs are scarce in the Lower Cretaceous from Spain but some occurrences have been cited (e.g. Pereda-Suberbiola et al., 2007; Gasulla et al., 2011). In Teruel province thyreophorans are also present within the Wealden facies (Pereda-Suberbiola et al., 2005; Gasca et al., 2009).

References:
Gasca, J.M., Gómez-Fernández, D., Moreno-Azanza, M., Canudo, J.I. 2009. Un paseo por los yacimientos del tránsito Hauteriviense - Barremiense (Cretácico Inferior) de Aragón. Paleolusitana, 1, 211-219. DOWNLOAD HERE

Gasulla, J.M., Ortega, F., Pereda-Suberbiola, X., Escaso, F., Sanz, J.L. 2011. Elementos de la armadura dérmica del dinosaurio anquilosaurio Polacanthus Owen, 1865, en el Cretácico Inferior de Morella (Castellón, España). Ameghiniana, 48, 4, 508-519.

Pereda Suberbiola, X. Galton, P.M., Ruiz-Omeñaca J.I., Canudo, J.I. 2005. Dermal spines of stegosaurian dinosaurs from the Lower Cretaceous (Hauterivian-Barremian) of Galve (Teruel, Aragón, Spain). Geogaceta, 38, 35-38. 

Pereda-Suberbiola, X., Fuentes, C., Meijide, M., Meijide-Fuentes, F., Meijide-Fuentes Jr., M. 2007. New remains of the ankylosaurian dinosaur Polacanthus from the Lower Cretaceous of Soria, Spain. Cretaceous Research, 28, 583-586.