The Bald Head Island 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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Bald Head Island’s center stands about 30 ft above sea level. Within three miles the land runs from 0 ft to 40 ft, a difference of 40 ft: nearly flat ground. Open water lies within three miles.
Under the town center the state geologic map shows Surficial Deposits, Undivided (sand, clay, gravel), from the Quaternary, less than 2.6 million years old.
The section below crosses 2 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.
Sand, clay, gravel. Age: Quaternary, less than 2.6 million years old. About 5 mi of the line.
Sand. Age: Tertiary, 2.6 to 66 million years old. About 5 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 Bald Head Island reaches the Atlantic Ocean by way of Cape Creek and the Cape Fear: about 6 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Bald Head Island; river miles along the main stem, rounded.
