The Carrabelle 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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Carrabelle’s center stands about 30 ft above sea level. Within three miles the land runs from 0 ft to 50 ft, a difference of 50 ft: nearly flat ground. Open water lies within three miles.
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.
Limestone. Age: Late Pliocene, 2.6 to 3.6 million years old. About 6 mi of the line.
Sand, clay. Age: Pleistocene to Holocene, less than 2.6 million years old. About 5 mi of the line.
Sand, clay. Age: Pleistocene to Holocene, less than 2.6 million years old. About 1 mi of the line.
Sand. Age: Holocene, less than 12,000 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.
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 Carrabelle reaches the Gulf of America by way of the New River: about 1 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Carrabelle; river miles along the main stem, rounded.
