The Promised Land 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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Promised Land’s center stands about 630 ft above sea level. Within three miles the land runs from 480 ft to 650 ft, a difference of 170 ft: gently rolling country. The highest named summit within 15 miles is Parsons Mountain, about 840 ft, 8 miles west-southwest.
Under the town center the state geologic map shows Biotite quartz-plagioclase gneiss (biotite-gneiss), from the Neoproterozoic to Paleozoic, 252 to 1,000 million years old.
The section below crosses 4 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 64×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Metagranite. Age: Neoproterozoic to Devonian, 359 to 1,000 million years old. About 16 mi of the line.
Biotite-gneiss. Age: Neoproterozoic to Paleozoic, 252 to 1,000 million years old. About 4 mi of the line.
Granite. Age: Carboniferous to Permian, 252 to 359 million years old. About 3 mi of the line.
Gabbro. Age: Silurian to Devonian, 359 to 445 million years old. About 0.4 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 Promised Land reaches the Atlantic Ocean by way of Hard Labor Creek, Stevens Creek and the Savannah: about 270 river miles.
200 miles of the trip are on the Savannah.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Promised Land; river miles along the main stem, rounded.
