ANIMAS FORMATION DINOSAURS Lucas et al. stated that because the
Paleocene fossil leaves and palynomorphs of the Animas Formation
were from levels stratigraphically above reported dinosaur
fossils, these dinosaurs may not be Paleocene in age. The Animas
Formation was first described in detail by and was originally
assigned a Paleocene age based on fossil leaves (Knowlton,
1924); this age was later confirmed based on palynomorphs
(Newman, 1987). Neuman not only stated that his studies
indicated that the Animas was Paleocene; he further stated that
palynologic evidence indicated that the lowermost Paleocene was
missing from the Animas Formation. The Animas is a
lithologically consistent and distinct unit containing
diagnostic volcaniclastic rock fragments that clearly
distinguish it from the underlying Cretaceous Kirtland Formation
strata. Reeside (1924) stated that the basal Animas Formation of
the northern San Juan Basin was equivalent in age to the
"Tertiary (?)" Ojo Alamo Sandstone of the southern part of th