The Bairoil plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.
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Bairoil’s center stands about 6,870 ft above sea level. Within three miles the land runs from 6,690 ft to 7,490 ft, a difference of 800 ft: hilly country. The highest named summit within 15 miles is Green Mountain, about 9,210 ft, 5 miles north.
The section below crosses 8 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 8×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Clay, silt, sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 8 mi of the line.
Conglomerate. Age: Eocene, 34 to 56 million years old. About 5 mi of the line.
Sand, unconsolidated. Age: Pleistocene to Holocene, less than 2.6 million years old. About 3 mi of the line.
Conglomerate. Age: Paleocene to Eocene, 34 to 66 million years old. About 3 mi of the line.
Sandstone, shale. Age: Late Cretaceous, 66 to 100 million years old. About 2 mi of the line.
Shale, siltstone. Age: Late Cretaceous, 78 to 83 million years old. About 2 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 2 smaller units along the line are not listed.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
