The Perry 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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Perry’s center stands about 50 ft above sea level. Within three miles the land runs from 40 ft to 100 ft, a difference of 60 ft: gently rolling country.
Under the town center the state geologic map shows Suwannee Limestone (limestone, dolostone), from the Oligocene, 23 to 34 million years old.
The section below crosses 3 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, dolostone. Age: Oligocene, 23 to 34 million years old. About 12 mi of the line.
Sand, clay. Age: Pleistocene to Holocene, less than 2.6 million years old. About 10 mi of the line.
Sand, clay. Age: Pleistocene to Holocene, less than 2.6 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.
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 Perry reaches the Gulf of America by way of Spring Creek and the Fenholloway: about 20 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Perry; river miles along the main stem, rounded.
