The Holloway 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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Holloway’s center stands about 950 ft above sea level. Within three miles the land runs from 900 ft to 1,270 ft, a difference of 370 ft: rolling country. The highest named summit within 15 miles is Galloway Knob, about 1,370 ft, 13 miles southeast.
Under the town center the state geologic map shows Conemaugh Group (shale, siltstone, mudstone), from the Carboniferous, 299 to 324 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 42×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Shale, siltstone, mudstone. Age: Carboniferous, 299 to 324 million years old. About 12 mi of the line.
Shale, siltstone, mudstone. Age: Carboniferous, 299 to 324 million years old. About 11 mi of the line.
Mudstone, shale, siltstone. Age: Carboniferous to Permian, 252 to 324 million years old. About 0.4 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 Holloway reaches the Gulf of America by way of Trail Run, the Boggs Fork, Stillwater Creek, the Tuscarawas, the Muskingum, the Ohio and the Mississippi: about 1,980 river miles.
970 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Holloway; river miles along the main stem, rounded.
