Arriagada I (egg level 4) (Cretaceous to of Argentina)

Also known as Salitral Ojo de Agua

Where: Río Negro, Argentina (39.4° S, 67.3° W: paleocoordinates 42.2° S, 53.0° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Middle Member (Allen Formation), Late/Upper Campanian to Late/Upper Campanian (83.5 - 66.0 Ma)

• "Egg level 4"

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; fine-grained, sandy sandstone and muddy mudstone

• "Interpreted as reflecting brackish lagoonal and supratidal environments, associated with aeolian sands (dunes) and deposits of ephemeral rivers"
• "A thick succession of sandstones and mudstones, with intercalations of carbonate and evaporitic rocks" "fine-grained sandy deposits with subordinate muddy layers and two thin evaporitic levels"

Size class: macrofossils

• T2A Megaloolithidae indet. eggs

Preservation: replaced with calcite

Collected in Oct-Dec 2003

• Eggs cleaned using ultrasound

Primary reference: L. Salgado, R. A. Coria, C. M. Magalhaes Ribeiro, A. Garrido, R. Rogers, M. E. Simon, A. B. Arcucci, K. Curry Rogers, A. Paulina Carabajal, S. Apesteguia, M. Fernandez, R. A. Garcia, and M. Talevi. 2007. Upper Cretaceous dinosaur nesting sites of Rio Negro (Salitral Ojo de Agua and Salinas de Trapalco-Salitral de Santa Rosa), northern Patagonia, Argentina. Cretaceous Research 28(3):392-404 [M. Carrano/M. Carrano/F. Aspromonte]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 96090: authorized by Matthew Carrano, entered by Matthew Carrano on 17.05.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
  - Fusioolithidae
Fusioolithus baghensis Khosla and Sahni 1995 dinosaur
T2A eggs