The Danville 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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Danville’s center stands about 1,740 ft above sea level. Within three miles the land runs from 1,710 ft to 4,210 ft, a difference of 2,500 ft: mountain country. The highest named summit within 15 miles is Profanity Peak, about 6,420 ft, 15 miles south-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 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 5×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Gneiss. Age: Paleozoic to Mesozoic, 66 to 542 million years old. About 5 mi of the line.
Granite. Age: Precambrian to Eocene. About 3 mi of the line.
Graywacke, quartzite. Age: Ordovician, 445 to 487 million years old. About 2 mi of the line.
Limestone. Age: Permian to Triassic, 202 to 299 million years old. About 1 mi of the line.
Silt, sand. Age: Holocene, less than 12,000 years old. About 0.9 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 Danville reaches the Pacific Ocean by way of the Columbia: about 730 river miles.
Lake on the way: Lake Umatilla.
420 miles of the trip are on the Columbia.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Danville; river miles along the main stem, rounded.
