The Odessa 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.
Mostly sunny
Showers likely
Partly cloudy
Mostly sunny
Chance of showers
Mostly cloudy
Partly cloudy
Odessa’s center stands about 1,550 ft above sea level. Within three miles the land runs from 1,530 ft to 1,910 ft, a difference of 380 ft: rolling country. The highest named summit within 15 miles is Coffeepot Butte, about 1,940 ft, 9 miles north.
Under the town center the state geologic map shows Miocene volcanic rocks (basalt), from the Late Oligocene to Early Pliocene, 3.6 to 28 million years old.
The section below crosses 2 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 32×. 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: Late Oligocene to Early Pliocene, 3.6 to 28 million years old. About 22 mi of the line.
Silt. Age: Pleistocene, less than 2.6 million years old. About 2 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 Odessa reaches the Pacific Ocean by way of Crab Creek, Lower Crab Creek and the Columbia: about 530 river miles.
Lakes on the way: Lake Umatilla, Potholes Reservoir and Moses Lake.
210 miles of the trip are on the Columbia.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Odessa; river miles along the main stem, rounded.
