Blasi 3, Arén (Cretaceous of Spain)

Where: Aragón, Spain (42.3° N, 0.7° E: paleocoordinates 34.3° N, 0.6° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: La Posa Formation (Tremp Group), Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• lower part of formation; upper part of chron c30n

•The Conques Formation is equivalent to the "lower Red Garumen" facies. The Conques Formation was previously assigned a late maastrichtian age (Sellés and Villa 2015; Villa et al. 2015) Biostratigraphy and Sr stable isotope geochemistry suggest that the La Posa and Conques Formation are entirely early Maastrichtian, lying within chron C31r (see Caus et al. 2016; Oms et al. 2016; Fondevilla et al. 2016; Fondevilla et al. 2019).

•Actually in the "Grey Garumnian" = La Posa Fm.

• bed-level stratigraphic resolution

Environment/lithology: "channel"; lithified, burrowed, fine-grained, gray, calcareous sandstone

• "1-m-thick channelized sandstone body...fine-grained, matrix-supported feldspathic sandstone contains Ophiomorpha burrows." "a 1-m thick grey massive calcareous sandstone containing Ophiomorpha burrows."; a greywacke

Size classes: macrofossils, mesofossils

Collected in 1998-2007

Collection methods: quarrying, chemical, mechanical,

• area of 70 sq m

Primary reference: J. I. Canudo, L. Ardévol, G. Cuenca-Bescós, N. López-Martínez, X. Murelaga, X. Pereda-Suberbiola, J. I. Ruiz-Omeñaca and X. Orue-Etxebarria. 1999. New dinosaur localities near the Cretaceous/Tertiary boundary from Arén (Huesca, Spain). In J. I. Canudo & G. Cuenca-Bescós (ed.), IV European Workshop on Vertebrate Paleontology. Programme and Abstracts. Field Guide 40-41 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 45438: authorized by Matthew Carrano, entered by Matthew Carrano on 22.10.2004, edited by Kaitlin Maguire, Patricia Holroyd, Richard Butler and Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

• Hadrosaur materials include pathological caudal vertebra (ref 28218).
unclassified
  -
cf. Cuniculichnus seilacheri2
trace fossils on Arenysaurus bones
Reptilia
 Testudines - Bothremydidae
Bothremydidae indet.4 sideneck turtle
cf. Polysternon sp.3 Portis 1882 sideneck turtle
 Loricata -
Eusuchia indet.3 Huxley 1875 crocodilian
Eusuchia indet.6 Huxley 1875 crocodilian
 Ornithischia - Hadrosauridae
Lambeosaurinae indet.1 Parks 1923 lambeosaurine
Arenysaurus ardevoli n. gen. n. sp.5 Pereda-Suberbiola et al. 2009 lambeosaurine
 Theropoda -
Theropoda "indet. 1"7 Marsh 1881 theropod
MPZ 98/67, 2004/8
 Theropoda - Dromaeosauridae
cf. Dromaeosauridae "indet. 5"8 Colbert and Russell 1969 maniraptoran
"Dromaeosauridae sp. B"; MPZ 98/68
 Life -
Ophiomorpha sp.3 Lundgren 1891