Beartooth Butte Formation

{{Infobox rockunit

| name = Beartooth Butte Formation

| image = Cosmaspis transversa (Beartooth Butte Formation, Lower Devonian; Cottonwood Canyon, east of Lovell, Wyoming, USA) 4 (33446628334).jpg

| caption = Fossil fish from the Beartooth Butte Formation

| type = Formation

| age = Lochkovian-Emsian
~{{fossil range|419|394}}

| period = Pragian

| prilithology = Mudstone, sandstone

| otherlithology = Shale, limestone

| namedfor = Beartooth Butte

| namedby =

| region = Wyoming

| country = {{USA}}

| coordinates = {{coord|44|57|N|109|37|W|display=inline,title}}

| paleocoordinates = {{coord|28.2|S|47.1|W|display=inline}}

| unitof =

| subunits = Cottonwood Canyon Member

| underlies =

| overlies =

| thickness =

| extent =

| area =

| map = {{Location map+ | United States#Wyoming

| relief = 1

| width = 250

| float = center

| places =

{{Location map~ | United States#Wyoming

| lat_deg = 44.95

| lon_deg = -109.61

| mark = Gold pog.svg

| marksize = 10

}}

}}

| map_caption =

}}

The Beartooth Butte Formation is a geologic formation in Wyoming. It preserves fossils dating back to the Devonian period.[https://paleobiodb.org/classic/displayStrata?geological_group=&formation=Beartooth%20Butte&group_formation_member=Beartooth%20Butte Beartooth Butte Formation] at Fossilworks.org