[1] The Kirtland Formation is the product of alluvial muds and overbank sand deposits from the many channels draining the coastal plain that existed on the inland seashore of North America, in the late Cretaceous period.

The base of the Kirtland Formation and its lowest sub-unit, the Hunter Wash member, has been dated to 75.02 ± 0.13 Ma.

[2] Together with the upper part of the underlying Fruitland Formation, this contains fossils representing the Hunter Wash local fauna.

The top of the De-na-zin member, which contains the Willow Wash local fauna, has been dated to 73.49 ± 0.25 Ma ago.

[3] Alamosaurus[4] A. sanjuanensis[4] Aublysodon[6] A. mirandus[6] Daspletosaurus[6] Indeterminate[6] Ahshislepelta[14] Anasazisaurus[15] Pentaceratops[20] P. sternbergi[20] Ziapelta[27] Navajodactylus[28] N. boerei[28] Partial phalanx and ulna fragment[28] A possible azhdarchid pterosaur known from fragmentary remains.