The Gantt 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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Gantt’s center stands about 240 ft above sea level. Within three miles the land runs from 170 ft to 400 ft, a difference of 230 ft: rolling country.
The section below crosses 7 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 55×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sand. Age: Eocene, 34 to 56 million years old. About 9 mi of the line.
Claystone. Age: Eocene, 34 to 56 million years old. About 4 mi of the line.
Sand. Age: Holocene, less than 12,000 years old. About 3 mi of the line.
Silt, clay. Age: Paleocene, 56 to 66 million years old. About 3 mi of the line.
Clay. Age: Eocene to Miocene, 5.3 to 56 million years old. About 2 mi of the line.
Clay, limestone. Age: Eocene, 34 to 56 million years old. About 2 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 1 smaller unit 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 Gantt reaches Pensacola Bay and the Gulf of America by way of the Conecuh, the Escambia and the Dead: about 140 river miles.
85 miles of the trip are on the Conecuh.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Gantt; river miles along the main stem, rounded.
