The Amalga 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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71° on Nov. 14, 1999, the hottest reading for this week of the year since 1944. Next is 68° in 2025.
Amalga’s center stands about 4,450 ft above sea level. Within three miles the land runs from 4,410 ft to 4,540 ft, a difference of 130 ft: gently rolling country. The highest named summit within 15 miles is Naomi Peak, about 9,920 ft, 12 miles east-northeast.
Under the town center the state geologic map shows Alluvium and colluvium (unconsolidated), from the Quaternary, less than 2.6 million years old.
The section below crosses 8 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.
Clay. Age: Pleistocene, less than 2.6 million years old. About 10 mi of the line.
Unconsolidated. Age: Quaternary, less than 2.6 million years old. About 6 mi of the line.
Mudstone, unconsolidated. Age: Middle Miocene to Late Pliocene, 2.6 to 16 million years old. About 3 mi of the line.
Dolostone. Age: Middle Cambrian to Early Ordovician, 471 to 521 million years old. About 2 mi of the line.
Dolostone, shale. Age: Middle Cambrian, 497 to 521 million years old. About 1 mi of the line.
Arenite. Age: Early Cambrian to Middle Cambrian, 497 to 542 million years old. About 0.8 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 2 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 Amalga reaches Great Salt Lake by way of Clay Slough and the Bear River: about 70 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 Amalga; river miles along the main stem, rounded.
Amalga has a dry-summer warm-summer continental climate. Summer afternoons average 89° in July; winter nights fall to about 12° in January. A normal year brings about 49 inches of snow; with the rain, that comes to about 17 inches of water.
On November 14 Amalga normally reaches 48° and falls to 23°. The record high is 71°, in 1999; the record low 1°, in 1978. The most rain on this date, 0.60 in, fell in 1988.
Normals 1991–2020 and records since 1944 at Trenton, 4 miles north. NOAA, through RCC-ACIS.
