Mexican Hat Monument Locality (Cutler Formation) (Permian to of the United States)

Also known as Halgaito Tongue

Where: San Juan County, Utah (37.2° N, 109.8° W: paleocoordinates 5.5° N, 36.2° W)

• coordinate based on nearby landmark

When: Cutler Formation, Wolfcampian to Wolfcampian (298.9 - 290.1 Ma)

• "The known fossils from the Halgaito tongue of the Cutler Formation, with rare exceptions, were found in lenses of channel conglomerates or in cross-bedded sandstones immediately above, below, or at the lateral edges of such conglomerates."

• group of beds-level stratigraphic resolution

Environment/lithology: "channel"; pebbly, shelly/skeletal, green, red, calcareous conglomerate and green, red, blue sandstone

• "...conglomerates, reddish, but with a somber grayish-green cast that makes them stand out darkly at a distance against their reddish-brown surroundings...The cross-bedded sandstones immediately adjacent to the conglomerates vary from red to bluish-green. In polished section typical pieces of the conglomerate are seen to be composed of rounded bebbles mostly in the size range from 0.5 to 2 cm; besides these rounded, obviously transported pebbles, there are variously-sized calcareous concretions, with jutting processes, that seem to have grown in place...the conglomerates are found scattered widely ovr the area of exposure. The bone in the conglomerate... appears in varying degrees of concentration, from "richly" fossiliferous...to very rare or nonexistent...The associated cross-bedded sandstones yielded larger pieces of bone..."

Size class: macrofossils

Preservation: cast

Primary reference: P. P. Vaughn. 1962. Vertebrates from the Halgaito Tongue of the Cutler Formation, Permian of San Juan County, Utah. Journal of Paleontology 36(3):529-539 [J. Alroy/R. Whatley/J. Head]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 13256: authorized by John Alroy, entered by Robin Whatley on 02.02.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Chondrichthyes
 Xenacanthiformes - Xenacanthidae
aff. Xenacanthus texensis
aff. Xenacanthus texensis elasmobranch
teeth