The Redfield 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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Redfield’s center stands about 860 ft above sea level. Within three miles the land runs from 830 ft to 930 ft, a difference of 100 ft: gently rolling country. The highest named summit within 15 miles is Guthrie Mountain, about 1,040 ft, 11 miles north.
Under the town center the state geologic map shows Marmaton Group (shale, limestone, sandstone), from the Carboniferous, 299 to 324 million years old.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 63×. 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, limestone, sandstone. Age: Carboniferous, 299 to 324 million years old. About 16 mi of the line.
Limestone, shale. Age: Carboniferous, 299 to 324 million years old. About 4 mi of the line.
Shale, sandstone. Age: Carboniferous, 299 to 324 million years old. About 2 mi of the line.
Sand, silt, clay. Age: Pleistocene to Holocene, less than 2.6 million years old. About 1 mi of the line.
Sandstone, shale. Age: Carboniferous, 299 to 324 million years old. About 0.8 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 Redfield reaches the Gulf of America by way of the Marmaton, the Little Osage, the Osage, the Missouri and the Mississippi: about 1,640 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 Redfield; river miles along the main stem, rounded.
