It is fossiliferous, with most specimens from the lower half of the formation, but exploration is only comparatively recent, with most work being done since 1982.

This, combined with the differences in fauna between the two formations, has led some scientists, most notably Scott Sampson, to conclude that there was some barrier separating northern and southern Laramidia at this time.

[2] According to new Uranium-Lead stratigraphic data, the fossil-bearing portion of the Kaiparowits Formation dates from about 77.24 to 75.02 million years ago,[2] with the volcaniclastic Upper Valley Member estimated to date from 73.8 to 72.8 million years ago.

The Kaiparowits Formation is a muddy bed that was deposited between about 77.3 to 72.8 million years ago,[2][3] in the area where the Grand Staircase–Escalante National Monument of Utah is today.

Based on plants remains including multiple vines, leaves, and branches, It was assumed by paleontologists Scott Sampson and his colleagues that Utah in the Campanian was a dense jungle bordering the Western Interior Seaway.

The jungle theory would also support why almost all the animals in the Kaiparowits Formation were new species, and why the deposits were so plentiful.

The theory also supported why the dinosaurs adorned such features like the 15 horns of Kosmoceratops, they were for sexual selection.

[10] Trace fossils are also known from the Kaiparowits, including an excellently preserved hadrosaur skin impression known from a recent analysis by Herrero and Farke.

[20] Kosmoceratops[24] K. richardsoni[24] A chasmosaurine ceratopsid with ten hook-like processes on the hind margin.

[24] Nasutoceratops[25] N. titusi[25] Lower middle unit[25] A centrosaurine ceratopsid with rounded horns above its eyes.