The Pearl River 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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Pearl River’s center stands about 530 ft above sea level. Within three miles the land runs from 380 ft to 560 ft, a difference of 180 ft: gently rolling country. The highest named summit within 15 miles is Smallwood Hills, about 750 ft, 13 miles north.
Under the town center the state geologic map shows Zilpha formation and Winona formation (clay, sand), from the Eocene, 34 to 56 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.
Clay, sand. Age: Eocene, 34 to 56 million years old. About 12 mi of the line.
Claystone, clay. Age: Eocene, 34 to 56 million years old. About 9 mi of the line.
Sand, clay. Age: Eocene, 34 to 56 million years old. About 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 Pearl River reaches the Gulf of America by way of the Pearl: about 390 river miles.
Lake on the way: Cypress Lake.
310 miles of the trip are on the Pearl.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Pearl River; river miles along the main stem, rounded.
