The Pe Ell 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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Pe Ell’s center stands about 410 ft above sea level. Within three miles the land runs from 350 ft to 1,250 ft, a difference of 900 ft: hilly country. The highest named summit within 15 miles is Boistfort Peak, about 3,100 ft, 7 miles southeast.
Under the town center the state geologic map shows Alluvium (silt, sand), from the Holocene, less than 12,000 years old.
The section below crosses 7 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 7×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Basalt. Age: Early Paleocene to Middle Eocene, 40 to 64 million years old. About 12 mi of the line.
Sandstone, siltstone. Age: Middle Eocene to Early Miocene, 16 to 48 million years old. About 5 mi of the line.
Sandstone, siltstone. Age: Miocene, 5.3 to 23 million years old. About 3 mi of the line.
Siltstone, sandstone. Age: Middle Eocene to Late Eocene, 34 to 48 million years old. About 1 mi of the line.
Basalt. Age: Late Oligocene to Early Pliocene, 3.6 to 28 million years old. About 1 mi of the line.
Silt, sand. Age: Holocene, less than 12,000 years old. About 1 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 1 smaller unit along the line are not listed.
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 Pe Ell reaches the Pacific Ocean by way of the Chehalis: about 110 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Pe Ell; river miles along the main stem, rounded.
