The Chiloquin 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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Chiloquin’s center stands about 4,180 ft above sea level. Within three miles the land runs from 4,160 ft to 5,060 ft, a difference of 900 ft: hilly country. The highest named summit within 15 miles is Pelican Butte, about 8,000 ft, 15 miles west-southwest.
Under the town center the state geologic map shows Alluvial deposits (sand, gravel, silt), from the Holocene, less than 12,000 years old.
The section below crosses 9 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.
Age: Pliocene to Pleistocene, less than 5.3 million years old. About 8 mi of the line.
Clay, silt, sand. Age: Pleistocene, less than 2.6 million years old. About 7 mi of the line.
Sandstone, siltstone, mudstone. Age: Miocene to Pliocene, 2.6 to 23 million years old. About 3 mi of the line.
Basalt, basaltic-andesite. Age: Miocene to Early Pliocene, 3.6 to 23 million years old. About 2 mi of the line.
Sand, gravel, silt. Age: Holocene, less than 12,000 years old. About 1 mi of the line.
Dacite, andesite. 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. 3 smaller units 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 Chiloquin reaches the Pacific Ocean by way of the Williamson, the Link and the Klamath: about 290 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Chiloquin; river miles along the main stem, rounded.
