[N] 2006 Sauropodomorph dinosaurs discovered in the McCoy Brook Formation, Nova Scotia
Fedak, T. (2006) A rich bonebed of Sauropodomorph dinosaurs in the Early Jurassoc (Hettangian) McCoy Brook formation. JVP 26(3) Abstracts pp.60
A bone bed of basal sauropodomorph dinosaurs has been recently discovered in the Early Jurassic (Hettangian) McCoy Brook Formation, on the shores of the Minas Basin in Nova Scotia. The new specimens demonstrate the McCoy Brook sauropodomorph is distinct from the genus Ammosaurus; lacking the distinct elongate preacetabular process of the ilium and the foramen in the rib of the second sacral vertebra.
All specimens collected from the site are affected by varying degrees of compression and fault displacement deformation, attributable to syndepositional faulting and high sedimentation rate in this small half-graben basin, as well as minimal permineralization of the fossil skeletons. Within the 10 m2 area of strata that has been excavated, five fully and semi-articulated skeletons have been recovered, including one nearly complete and three partial large specimens, and a smaller articulated skeleton similar in size to the largest Ammosaurus specimen.
Preliminary sedimentological evidence suggests the skeletons were buried rapidly by fluvial sediments after a short period of sub-aerially exposure. The McCoy Brook sauropodomorph taxon has an elongate postacetabular process, a five vertebrae sacrum, and several unique cranial features. These specimens represent the oldest dinosaur skeletons in Canada and the richest deposit of sauropodomorph dinosaurs in North America