FIG. 1 in Discovery of Oligocene-aged mammals in Glacier National Park (Kishenehn Formation), Montana

FIG. 1. — Geographic context of the Oligocene-aged fossils from Glacier National Park: A, detailed map of the Kishenehn basin showing the North Fork and Middle Fork areas, faults in the area (continuous black lines), continental divide (red), national park boundaries (dashed blue line), and water courses (gray). Localities of GLAC 26988 (1), GLAC 26987 (2), and CM 87801 (3) are also showed (modified from Dawson & Constenius 2018). Detailed geographic information is available to qualified researchers from repositories; B, map of western Montana showing the location of five coeval Arikareean-aged deposits bearing leptomerycid and/ or equid fossils: the Kishenehn, Renova (Cabbage Patch beds), and Fort Logan formations as well as the Canyon Ferry Reservoir and the Peterson Creek Local Fauna (in Idaho). Select water bodies, cities, and the continental divide are also displayed. Grey areas represent basins with strata coeval with the Kishenehn Formation. Black box shows location of A; C, location of the state of Montana within the United States with black box showing location of B.