Gypsum dune fields at White Sands National Monument within the Chihuahuan Desert and the Tularosa Basin near Alamogordo, New ...

With pollen and common ditch grass seed found both in the footprints and within the same layer of hardened mud in which the ...

Both types of dinosaurs would have had to have enough weight to leave behind such footprints, sinking through the sand to the hardened mud below, and that could last until this day. Blakesley ...