The Conconully 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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Conconully’s center stands about 2,310 ft above sea level. Within three miles the land runs from 2,090 ft to 5,120 ft, a difference of 3,030 ft: mountain country. The highest named summit within 15 miles is Tiffany Mountain, about 8,200 ft, 11 miles northwest.
Under the town center the state geologic map shows Pre-Upper Jurassic metamorphic rocks of the medium and high-grade zone (schist), from the Triassic to Early Cretaceous, 100 to 252 million years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 3×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Schist. Age: Triassic to Early Cretaceous, 100 to 252 million years old. About 13 mi of the line.
Granite. Age: Precambrian to Eocene. About 11 mi of the line.
Sand, gravel. Age: Pleistocene, less than 2.6 million years old. About 0.3 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 Conconully reaches the Pacific Ocean by way of Salmon Creek, the Okanogan and the Columbia: about 570 river miles.
Lake on the way: Lake Umatilla.
250 miles of the trip are on the Columbia.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Conconully; river miles along the main stem, rounded.
