The Grovespring 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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Grovespring’s center stands about 1,330 ft above sea level. Within three miles the land runs from 1,190 ft to 1,460 ft, a difference of 270 ft: rolling country. The highest named summit within 15 miles is Pleasant Knob, about 1,620 ft, 14 miles south-southwest.
Under the town center the state geologic map shows Roubidoux Formation (sandstone, chert), from the Early Ordovician, 471 to 487 million years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 34×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Dolostone. Age: Early Ordovician, 471 to 487 million years old. About 16 mi of the line.
Sandstone, chert. Age: Early Ordovician, 471 to 487 million years old. About 7 mi of the line.
Dolostone. Age: Early Ordovician, 471 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.
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 Grovespring reaches the Gulf of America by way of Parks Creek, the Osage Fork Gasconade, the Gasconade, the Missouri and the Mississippi: about 1,510 river miles.
1,170 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Grovespring; river miles along the main stem, rounded.
