The Coaldale 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.
Partly cloudy
Sunny; warmer
Partly cloudy
Showers likely
Mostly sunny
Partly cloudy
Chance of showers
Coaldale’s center stands about 6,550 ft above sea level. Within three miles the land runs from 6,470 ft to 8,290 ft, a difference of 1,820 ft: steep hill country. The highest named summit within 15 miles is Electric Peak, about 13,550 ft, 13 miles south-southeast.
Under the town center the state geologic map shows Gravels and alluviums (gravel, unconsolidated), from the Pleistocene, less than 0.5 million years old.
The section below crosses 7 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.
Granite. Age: Paleoproterozoic, 1.6 to 2.5 billion years old. About 11 mi of the line.
Sandstone, shale. Age: Carboniferous, 299 to 324 million years old. About 7 mi of the line.
Gravel, unconsolidated. Age: Pleistocene, less than 0.5 million years old. About 2 mi of the line.
Mafic-hypabyssal, felsic-hypabyssal. Age: Eocene to Miocene, 5.3 to 56 million years old. About 2 mi of the line.
Unconsolidated. Age: Pleistocene, less than 0.5 million years old. About 1 mi of the line.
Siltstone, shale. Age: Carboniferous, 299 to 324 million years old. About 0.7 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 1 smaller unit 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 Coaldale reaches the Gulf of America by way of Short Creek, the Arkansas and the Mississippi: about 1,940 river miles.
Lakes on the way: Murray Lake and Ozark Lake.
1,050 miles of the trip are on the Arkansas.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Coaldale; river miles along the main stem, rounded.
