The Mountain Green 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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75° on Nov. 14, 2025, the hottest reading for this week of the year since 1962. Next is 68° in 2020.
Mountain Green’s center stands about 4,930 ft above sea level. Within three miles the land runs from 4,830 ft to 6,090 ft, a difference of 1,260 ft: steep hill country. The highest named summit within 15 miles is Thurston Peak, about 9,650 ft, 6 miles southwest.
The section below crosses 10 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 4×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Metamorphic. Age: Neoarchean to Paleoproterozoic, 1.6 to 2.8 billion years old. About 5 mi of the line.
Conglomerate, mixed-clastic. Age: Late Cretaceous to Early Eocene, 48 to 100 million years old. About 5 mi of the line.
Andesite. Age: Late Eocene to Oligocene, 23 to 38 million years old. About 4 mi of the line.
Unconsolidated. Age: Quaternary, less than 2.6 million years old. About 4 mi of the line.
Unconsolidated. Age: Pliocene to Pleistocene, less than 5.3 million years old. About 2 mi of the line.
Clay. 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. 4 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 Mountain Green reaches Great Salt Lake by way of the Weber: about 45 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 Mountain Green; river miles along the main stem, rounded.
Mountain Green has a dry-summer hot-summer continental climate. Summer afternoons average 92° in July; winter nights fall to about 20° in January. A normal year brings about 23 inches of snow; with the rain, that comes to about 26 inches of water.
Normals 1991–2020 and records since 1962 at Weber Basin Pump Plant 3, 7 miles west-southwest. NOAA, through RCC-ACIS.
