The Corry 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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Corry’s center stands about 1,440 ft above sea level. Within three miles the land runs from 1,380 ft to 1,840 ft, a difference of 460 ft: hilly country. The highest named summit within 15 miles is Jackson Hill, about 1,980 ft, 9 miles southeast.
Under the town center the state geologic map shows Venango Formation (siltstone, conglomerate), from the Late Devonian, 359 to 384 million years old.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 29×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Siltstone, conglomerate. Age: Late Devonian, 359 to 384 million years old. About 13 mi of the line.
Sandstone, shale. Age: Late Devonian, 359 to 384 million years old. About 9 mi of the line.
Siltstone, shale. Age: Late Devonian, 359 to 384 million years old. About 1 mi of the line.
Sandstone, conglomerate. Age: Carboniferous, 299 to 324 million years old. About 0.6 mi of the line.
Siltstone, shale. Age: Carboniferous, 324 to 359 million years old. About 0.3 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 Corry reaches the Gulf of America by way of Hare Creek, Brokenstraw Creek, the Allegheny, the Ohio and the Mississippi: about 2,160 river miles.
970 miles of the trip are on the Ohio.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Corry; river miles along the main stem, rounded.
