Rock Island topographic map
Click on the map to display elevation.
About this map
Name: Rock Island topographic map, elevation, terrain.
Location: Rock Island, Douglas County, Washington, United States (47.36691 -120.14913 47.37966 -120.12614)
Average elevation: 214 m
Minimum elevation: 185 m
Maximum elevation: 420 m
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Moses Coulee
United States > Washington > Douglas County
Pleistocene glaciers advanced onto the Waterville Plateau, with the Okanogan Lobe of the Cordilleran Ice Sheet reaching as far south as the town of Withrow. Evidence for glaciation on the Waterville Plateau includes polished and striated bedrock, glacial erratics, drumlinoid topography, eskers, moraines,…
Average elevation: 666 m