Adobe Canyon ASDM 482, 485 & 552 (Cretaceous of the United States)

Where: Santa Cruz County, Arizona (31.7° N, 110.8° W: paleocoordinates 39.6° N, 83.9° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Fort Crittenden Formation, Late/Upper Campanian (83.5 - 70.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; red, calcareous mudstone

• hard, reddish–purple calcareous mudstone matrix

Size class: macrofossils

Collection methods: Matrix was removed with a pneumatic drill after periodic submergence in weak formic acid (7%, buffered with calcium phosphate)

Primary reference: M. D. D'Emic, J. A. Wilson, and R. Thompson. 2010. The end of the sauropod dinosaur hiatus in North America. Palaeogeography, Palaeoclimatology, Palaeoecology 297:486-490 [P. Mannion/P. Mannion/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 138220: authorized by Philip Mannion, entered by Philip Mannion on 07.01.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

 Architaenioglossa - Viviparidae
? Viviparus sp. Montfort 1810 snail
Embedded on the posterior lip of the neural canal of ASDM 552
 Neornithischia - Hadrosauridae
Hadrosauridae indet. Cope 1869 hadrosaurid
ASDM 482 & 552 (two posterior cervical vertebrae) and ASDM 485 (one partial middle dorsal vertebra)