The Old Shawneetown 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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Old Shawneetown’s center stands about 350 ft above sea level. Within three miles the land runs from 320 ft to 600 ft, a difference of 280 ft: rolling country. The highest named summit within 15 miles is High Knob, about 920 ft, 12 miles west-southwest.
The section below crosses 7 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 44×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Shale, sandstone. Age: Early Pennsylvanian to Middle Pennsylvanian, 307 to 324 million years old. About 6 mi of the line.
Sand, silt. Age: Pleistocene to Holocene, less than 2.6 million years old. About 6 mi of the line.
Siltstone. Age: Carboniferous, 299 to 324 million years old. About 5 mi of the line.
Shale, sandstone. Age: Early Pennsylvanian, 315 to 324 million years old. About 3 mi of the line.
Shale, sandstone, coal. Age: Middle Pennsylvanian to Late Pennsylvanian, 304 to 315 million years old. About 1 mi of the line.
Limestone, sandstone, shale. Age: Late Mississippian, 324 to 331 million years old. About 1 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 1 smaller unit 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.
A raindrop that lands in Old Shawneetown reaches the Gulf of America by way of the Ohio and the Mississippi: about 1,090 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Old Shawneetown; river miles along the main stem, rounded.
