The Chatsworth 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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Chatsworth’s center stands about 750 ft above sea level. Within three miles the land runs from 700 ft to 1,640 ft, a difference of 940 ft: steep hill country. The highest named summit within 15 miles is Cowpen Mountain, about 4,160 ft, 14 miles northeast.
Under the town center the state geologic map shows Conasauga Group; Lower unit; shale and sandstone unit (shale, sandstone), from the Cambrian, 487 to 542 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 7×. 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: Cambrian, 487 to 542 million years old. About 11 mi of the line.
Slate, quartzite, conglomerate. Age: Precambrian to Paleozoic. About 7 mi of the line.
Limestone, shale. Age: Cambrian, 487 to 542 million years old. About 3 mi of the line.
Dolostone. Age: Cambrian to Ordovician, 445 to 542 million years old. About 3 mi of the line.
Limestone. Age: Cambrian, 487 to 497 million years old. About 0.3 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 Chatsworth reaches Mobile Bay and the Gulf of America by way of Mill Creek, the Conasauga, the Oostanaula, the Coosa, the Alabama and the Mobile: about 730 river miles.
Lake on the way: Lay Lake.
310 miles of the trip are on the Alabama.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Chatsworth; river miles along the main stem, rounded.
