The La Joya 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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82° on Nov. 13, 1973, the hottest reading for this week of the year since 1893. Next is 81° in 1917.
La Joya’s center stands about 4,730 ft above sea level. Within three miles the land runs from 4,700 ft to 5,010 ft, a difference of 310 ft: rolling country. The highest named summit within 15 miles is Ladron Peak, about 9,040 ft, 15 miles west-northwest.
Under the town center the state geologic map shows Alluvium (unconsolidated), from the Pleistocene to Holocene, less than 0.1 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 15×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Conglomerate-sandstone, coarse-detrital, fine-detrital. Age: Late Miocene to Pleistocene, 0.1 to 7.2 million years old. About 11 mi of the line.
Unconsolidated. Age: Pleistocene to Holocene, less than 0.1 million years old. About 4 mi of the line.
Unconsolidated. Age: Pleistocene to Holocene, less than 2.6 million years old. About 3 mi of the line.
Conglomerate-sandstone, coarse-detrital, fine-detrital. Age: Late Oligocene to Late Miocene, 5.3 to 28 million years old. About 2 mi of the line.
Sandstone, mudstone, conglomerate. Age: Middle Triassic to Late Triassic, 202 to 247 million years old. About 2 mi of the line.
Limestone, dolostone. Age: Permian, 260 to 290 million years old. About 0.6 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 La Joya reaches the Gulf of America by way of the Arroyo los Alamos and the Rio Grande: about 1,490 river miles.
Lakes on the way: Paz Ramirez Lake, Amistad Reservoir, Elephant Butte Reservoir and Caballo Reservoir.
760 miles of the trip are on the Rio Grande.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of La Joya; river miles along the main stem, rounded.
La Joya has a cold semi-arid climate. Summer afternoons average 91° in June; winter nights fall to about 23° in January. About 10 inches of rain fall in a normal year.
On November 14 La Joya normally reaches 61° and falls to 31°. The record high is 77°, in 1973; the record low 12°, in 1916. The most rain on this date, 0.34 in, fell in 1924.
Normals 1991–2020 and records since 1893 at Socorro, 20 miles south, 140 ft lower. NOAA, through RCC-ACIS.
