The Grace 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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Grace’s center stands about 5,530 ft above sea level. Within three miles the land runs from 5,420 ft to 6,570 ft, a difference of 1,150 ft: steep hill country. The highest named summit within 15 miles is Sherman Peak, about 9,650 ft, 12 miles southeast.
Under the town center the state geologic map shows Basalt (Pleistocene and Pliocene), from the Late Pliocene to Pleistocene, less than 3 million years old.
The section below crosses 9 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 5×. 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 Pliocene to Pleistocene, less than 3 million years old. About 12 mi of the line.
Limestone, dolostone. Age: Cambrian to Ordovician, 445 to 542 million years old. About 5 mi of the line.
Silt. Age: Pleistocene, less than 2.6 million years old. About 2 mi of the line.
Age: Neoproterozoic to Cambrian, 487 to 1,000 million years old. About 2 mi of the line.
Fine-detrital. Age: Quaternary, less than 2.6 million years old. About 1 mi of the line.
Dolostone, limestone, sandstone. Age: Ordovician to Devonian, 359 to 487 million years old. About 0.9 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 3 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 Grace reaches Great Salt Lake by way of the Bear River: about 170 river miles. Great Salt Lake has no outlet to the sea: the water leaves only by evaporating or soaking into the ground.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Grace; river miles along the main stem, rounded.
