The Tygh Valley 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.
Showers likely
Showers likely
Chance of showers
Chance of showers
Showers likely
Mostly cloudy
Partly cloudy
Tygh Valley’s center stands about 1,190 ft above sea level. Within three miles the land runs from 1,040 ft to 2,660 ft, a difference of 1,620 ft: steep hill country. The highest named summit within 15 miles is Gordon Butte, about 4,820 ft, 14 miles west-northwest.
The section below crosses 8 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: Middle Miocene, 12 to 16 million years old. About 7 mi of the line.
Hypabyssal-rhyolite, hypabyssal-dacite. Age: Miocene, 5.3 to 23 million years old. About 6 mi of the line.
Sandstone, siltstone, mudstone. Age: Miocene to Pliocene, 2.6 to 23 million years old. About 4 mi of the line.
Basalt. Age: Early Miocene to Middle Miocene, 12 to 23 million years old. About 3 mi of the line.
Basalt. Age: Miocene to Pliocene, 2.6 to 23 million years old. About 3 mi of the line.
Clay, silt, sand. Age: Pleistocene, less than 2.6 million 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. 2 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 Tygh Valley reaches the Pacific Ocean by way of Tygh Creek, the White River, the Deschutes and the Columbia: about 250 river miles.
200 miles of the trip are on the Columbia.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Tygh Valley; river miles along the main stem, rounded.
