The Travesser Formation is a geologic formation in northeastern New Mexico, southeastern Colorado, westernmost Oklahoma, and northwestern Texas,[1] particularly in the Dry Cimarron valley.

[2] It preserves fossils dating back to the late Triassic period.

[1][3] The proposal of Spencer G. Lucas and his collaborators to abandon the Dockum Group, possibly in favor of the Chinle Group, is highly controversial.

[4] A fossil phytosaur skull and metoposaurids have been found in the formation.

[1] Lucas et al. rejected the assignment of the formation to the Dockum Group and adjusted the lower contact.