The Lindsay 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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Lindsay’s center stands about 2,690 ft above sea level. Within three miles the land runs from 2,620 ft to 2,920 ft, a difference of 300 ft: rolling country. The highest named summit within 15 miles is Mount Antelope, about 3,460 ft, 12 miles west-northwest.
Under the town center the state geologic map shows Tongue River Member of Fort Union Formation (sandstone, shale), from the Early Paleocene to Middle Paleocene, 59 to 66 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 23×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone, shale. Age: Early Paleocene to Middle Paleocene, 59 to 66 million years old. About 23 mi of the line.
Gravel, sand, silt. Age: Pleistocene to Holocene, less than 1.8 million years old. About 1 mi of the line.
Age: Late Miocene to Holocene, less than 7.2 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 Lindsay reaches the Gulf of America by way of Spring Creek, Upper Sevenmile Creek, the Yellowstone, the Missouri and the Mississippi: about 2,870 river miles.
Lakes on the way: Lake Oahe, Lake Sakakawea, Lake Sharpe and Lake Francis Case.
1,170 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Lindsay; river miles along the main stem, rounded.
