Fossil from Laramidia

This is a scan of a recent work of painted plaster, castings of figures, fossilized artifacts from childhood in Laramie, Wyoming. I am pleased to read that Laramidia is now the official name of a vast island continent of North America during the Cretaceous period, when the continent that we know now was split by a sea. It is named after Laramie Wyoming. Though the objects fossilized in this work are recent (even the arrow head, relatively), this region of Wyoming is a fossil-land, offering up objects of such ancientness, my mind is boggled when I try to picture them in relation to time on a human scale (dinosaur bones, for example.)