| Bear Formation(expression, geohistory, formation, montana) |
| Climbing Arrow Formation(expression, geohistory, formation, montana) |
| Cook Ranch Formation(expression, geohistory, formation, montana) |
| Dell Beds Formation(expression, geohistory, formation, montana) |
| Dunbar Creek Formation(expression, geohistory, formation, montana) |
| Fort Union Formation(expression, geohistory, formation, montana) |
| Hell Creek Formation(expression, geohistory, formation, montana) |
| Kishenehn Formation(expression, geohistory, formation, montana) |
| Laramide orogeny(expression, geohistory, formation, montana) |
| Lebo Formation(expression, geohistory, formation, montana) |
| Livingston Formation(expression, geohistory, formation, montana) |
| Ludlow Formation(expression, geohistory, formation, montana) |
| Melville Formation(expression, geohistory, formation, montana) |
| Passamari Formation(expression, geohistory, formation, montana) |
| Polecat Bench Formation(expression, geohistory, formation, montana) |
| Renova Formation(expression, geohistory, formation, montana) |
| Sage Creek Formation(expression, geohistory, formation, montana) |
| Sevier orogeny(expression, geohistory, formation, montana) |
| Tongue River Formation(expression, geohistory, formation, montana) |
| Toston Formation(expression, geohistory, formation, montana) |