I’ve just returned from a Turonian dinosaur hunt in New Mexico! Dinosaurs from this age are extremely rare in North America (and globally as well). Sea levels were at their highest at this time and much of North America was either totally submerged under the Western Interior Seaway, or were rapidly eroding highlands that are gone today. In the United States, New Mexico is the place to be if you want to find dinosaurs from this age, so we spent two weeks checking out the Moreno Hill and Crevasse Canyon formations in the western edge of the state.
Ankylosaurs, like probably most other dinosaurs, were landlubbing, terrestrial animals without obvious aquatic adaptations. And yet, surprisingly, their fossils are found in marine sedimentary environments more often than most other dinosaurs (except hadrosaurs). Some, like Aletopelta, wound up in shallow or lagoonal environments – Aletopelta’s carcass became a reef! – but some, like the Suncor nodosaurid, wound up far away from shore.
Aletopelta! See if you can spot the oyster marks, invertebrates, and shark teeth around the pelvis and legs.