Tiroco (Cretaceous of Spain)

Where: Asturias, Spain (43.4° N, 5.6° W: paleocoordinates 32.0° N, 1.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: La Cabaña Formation, Late/Upper Cenomanian (99.6 - 93.5 Ma)

• "the La Cabana Formation includes various lithological units belonging to two depositional sequences....The base of the formation consists of a 70-110 cm thick orange limestone bed that overlies the tidal estuarine sand of the middle Cenomanian Latores Formation. The internal structure of this bed is a massive, porous basal limestone grading upward into a finely laminated, indurated limestone" "A 7-35 cm thick transgressive lag overlies this erosion surface. It is made of bioclastic sandy silt which includes some slabs...of caliche clasts with root traces"

Environment/lithology: lagoonal; massive limestone and silty, sandy limestone

• "deposited in a marine coastal lagoon with tidally influenced channels. The base of the bed (and of the formation) represents a marine flooding surface which may be correlative with the maximum flooding surface of a sequence initiated in the Latores Formation."
• "orange limestone....this bed is a massive, porous basal limestone grading upward into a finely laminated, indurated limestone....[and] bioclastic sandy silt"

Size class: mesofossils

Collection methods: bulk, surface (float),

• Unidad de Paleontologia of the Universidad Autonoma de Madrid (will be stored in Faculdad de Geologia of the Universidad de Oviedo)

Primary reference: R. Vullo, E. Bernardez, and A. D. Buscalioni. 2009. Vertebrates from the middle?-late Cenomanian La Cabana Formation (Asturias, northern Spain): Palaeoenvironmental and palaeobiogeographic implications. Palaeogeography, Palaeoclimatology, Palaeoecology 276:120-129 [M. Carrano/M. Oreska]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 98397: authorized by Matthew Carrano, entered by Matthew Oreska on 05.10.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

• "yielded a large jaw of a pycnodontiform fish, besides a few ammonite specimens referred to the index species Neolobites vibrayeanus"
Show authors, comments, and common names
unclassified
  -
Cosmodus carentonensis
Cosmodus carentonensis
prearticular dentition (MGM-2504C)
Cephalopoda
 Ammonitida - Engonoceratidae
Neolobites vibrayeanus
Neolobites vibrayeanus d'Orbigny 1841 ammonite