The Three Points 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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94° on Nov. 12, 1967, the hottest reading for this week of the year since 1942. Next is 93° in 1999.
Three Points’s center stands about 2,540 ft above sea level. Within three miles the land runs from 2,450 ft to 2,800 ft, a difference of 350 ft: rolling country. The highest named summit within 15 miles is Keystone Peak, about 6,160 ft, 15 miles south-southeast.
Under the town center the state geologic map shows Quaternary surficial deposits, undivided (sand, silt, clay), from the Pleistocene to Holocene, less than 2 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 10×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sand, silt, clay. Age: Pleistocene to Holocene, less than 2 million years old. About 11 mi of the line.
Rhyolite, dacite, andesite. Age: Late Cretaceous to Early Eocene, 50 to 82 million years old. About 3 mi of the line.
Diorite, alkali-granite, granodiorite. Age: Early Jurassic to Late Jurassic, 150 to 180 million years old. About 3 mi of the line.
Basalt, andesite, dacite. Age: Middle Eocene to Late Miocene, 11 to 38 million years old. About 2 mi of the line.
Granite, granodiorite, diorite. Age: Late Cretaceous to Early Eocene, 50 to 82 million years old. About 2 mi of the line.
Gravel, sand. Age: Late Pliocene to Pleistocene, 0.8 to 3 million years old. About 1 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.
Three Points has a hot desert climate. Summer afternoons average 99° in June; winter nights fall to about 33° in December. Barely 0.0 inches of rain fall in a normal year.
On November 14 Three Points normally reaches 75° and falls to 40°. The record high is 91°, in 1999; the record low 22°, in 2018. The most rain on this date, 0.65 in, fell in 1968.
Normals 1991–2020 and records since 1942 at Anvil Ranch, 8 miles south-southwest, 220 ft higher. NOAA, through RCC-ACIS.
