The Connerville 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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Connerville’s center stands about 1,000 ft above sea level. Within three miles the land runs from 930 ft to 1,110 ft, a difference of 180 ft: gently rolling country.
The section below crosses 10 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 33×. 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, dolostone. Age: Early Ordovician, 471 to 487 million years old. About 8 mi of the line.
Fine-detrital. Age: Holocene, less than 12,000 years old. About 7 mi of the line.
Shale. Age: Carboniferous, 324 to 359 million years old. About 3 mi of the line.
Limestone, shale, sandstone. Age: Middle Ordovician, 459 to 471 million years old. About 3 mi of the line.
Limestone, dolostone. Age: Early Ordovician, 471 to 487 million years old. About 2 mi of the line.
Limestone. Age: Carboniferous, 299 to 324 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. 4 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 Connerville reaches the Gulf of America by way of the Blue River, the Red River, the Atchafalaya and the Lower Atchafalaya: about 850 river miles.
610 miles of the trip are on the Red River.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Connerville; river miles along the main stem, rounded.
