The Palmyra 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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Palmyra’s center stands about 1,250 ft above sea level. Within three miles the land runs from 910 ft to 1,440 ft, a difference of 530 ft: hilly country. The highest named summit within 15 miles is High Knob, about 2,300 ft, 13 miles west-northwest.
Under the town center the state geologic map shows Long Run and Walcksville Members of Catskill Formation, undivided (sandstone, siltstone, mudstone), 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 21×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone, siltstone, mudstone. Age: Late Devonian, 359 to 384 million years old. About 13 mi of the line.
Conglomerate-sandstone, sandstone. Age: Late Devonian, 359 to 384 million years old. About 7 mi of the line.
Sandstone, siltstone, shale. Age: Late Devonian, 359 to 384 million years old. About 2 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 Palmyra reaches Delaware Bay and the Atlantic Ocean by way of the Lackawaxen and the Delaware: about 270 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Palmyra; river miles along the main stem, rounded.
