U.S.A., Wyoming, Sublette, Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge area: Pine Grove Creek near northwest end of Cretaceous Mountain; ca 15.5 air mi SW of Big Piney.
42.4269 -110.3672
42.4269° N, 110.3672° W; T28N R114W S10 NE1/4 of SE1/4