The Hardenburgh 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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Hardenburgh’s center stands about 3,160 ft above sea level. Within three miles the land runs from 1,850 ft to 3,490 ft, a difference of 1,640 ft: steep hill country. The highest named summit within 15 miles is Slide Mountain, about 4,180 ft, 13 miles east-southeast.
Under the town center the state geologic map shows Honesdale Formation (sandstone, shale), from the Late Devonian, 359 to 384 million years old.
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 8×. 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, sandstone, conglomerate. Age: Late Devonian, 359 to 384 million years old. About 12 mi of the line.
Shale, sandstone, conglomerate. Age: Late Devonian, 359 to 384 million years old. About 7 mi of the line.
Sandstone, conglomerate, shale. Age: Late Devonian, 359 to 384 million years old. About 3 mi of the line.
Sandstone, shale. Age: Late Devonian, 359 to 384 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 Hardenburgh reaches Delaware Bay and the Atlantic Ocean by way of Beaver Kill, the East Branch Delaware and the Delaware: about 350 river miles.
300 miles of the trip are on the Delaware.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Hardenburgh; river miles along the main stem, rounded.
