Hanna Formation

{{Infobox rockunit

| name = Hanna Formation

| image = Petrified Wood in Wyoming.jpg

| caption = Petrified wood from the Hanna Formation

| type = Formation

| age = Selandian-Thanetian (Torrejonian-Tiffanian)
~{{fossil range|63|56}}

| period = Thanetian

| prilithology =

| otherlithology =

| namedfor = High Hanna Hill

| namedby =

| region = Wyoming

| country = {{USA}}

| coordinates = {{coord|41.8|N|107.0|W|display=inline,title}}

| paleocoordinates = {{coord|47.6|N|86.8|W|display=inline}}

| unitof =

| subunits =

| underlies =

| overlies =

| thickness =

| extent = Carbon Basin

| area =

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

| relief = 1

| width = 250

| float = center

| places =

{{Location map~ | United States#Wyoming

| lat_deg = 41.8

| lon_deg = -107.0

| mark = Orange pog.svg

| marksize = 10

}}

}}

| map_caption =

}}

File:Tilted Rock Layers in Wyoming 1.jpg

The Hanna Formation is a geologic formation in Wyoming. It preserves fossils dating back to the Torrejonian to Tiffanian stages of the Paleogene period.[https://paleobiodb.org/classic/displayStrata?geological_group=&formation=Hanna&group_formation_member=Hanna Hanna Formation] at Fossilworks.org