The Danville 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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Danville’s center stands about 940 ft above sea level. Within three miles the land runs from 850 ft to 1,080 ft, a difference of 230 ft: rolling country. The highest named summit within 15 miles is Sand Knob, about 1,470 ft, 10 miles south-southwest.
Under the town center the state geologic map shows Lexington Limestone, from the Middle Ordovician, 459 to 471 million years old.
The section below crosses 9 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 31×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Limestone. Age: Middle Ordovician, 459 to 471 million years old. About 9 mi of the line.
Shale. Age: Devonian to Carboniferous, 324 to 422 million years old. About 5 mi of the line.
Limestone. Age: Ordovician, 445 to 487 million years old. About 5 mi of the line.
Limestone. Age: Carboniferous, 324 to 359 million years old. About 1 mi of the line.
Dolostone, limestone. Age: Carboniferous, 324 to 359 million years old. About 1 mi of the line.
Shale, limestone. Age: Ordovician, 445 to 487 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. 3 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.
A raindrop that lands in Danville reaches the Gulf of America by way of Balls Branch, the Dix, the Kentucky, the Ohio and the Mississippi: about 1,560 river miles.
Lake on the way: Herrington Lake.
970 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Danville; river miles along the main stem, rounded.
