Geology
The monument lies along the western portion of the Rio Grande rift and is within part of the Robledo Mountains. It is made up of Cenozoic and Paleozoic (Hueco Group ) sediments. The Hueco Group is early Permian strata . Most of the monument is Permian and would have been under water or along the coast of what was once the Hueco Seaway. The tracks can be found in the red rock which is called the abo red beds.
Read more about this topic: Prehistoric Trackways National Monument