The Lyden 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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79° on Nov. 15, 1975, the hottest reading for this week of the year since 1953. Next is 79° in 1999.
Lyden’s center stands about 5,740 ft above sea level. Within three miles the land runs from 5,710 ft to 6,840 ft, a difference of 1,130 ft: steep hill country. The highest named summit within 15 miles is Copper Hill, about 7,820 ft, 13 miles east-northeast.
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 6 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 9×. 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 Oligocene to Late Miocene, 5.3 to 28 million years old. About 10 mi of the line.
Conglomerate-sandstone, coarse-detrital, fine-detrital. Age: Late Miocene to Pleistocene, 0.1 to 7.2 million years old. About 5 mi of the line.
Basalt, andesite. Age: Pliocene, 2.6 to 5.3 million years old. About 3 mi of the line.
Unconsolidated. Age: Pleistocene to Holocene, less than 0.1 million years old. About 3 mi of the line.
Unconsolidated. Age: Pleistocene to Holocene, less than 2.6 million years old. About 2 mi of the line.
Unconsolidated. Age: Pleistocene to Holocene, less than 2.6 million years old. About 0.7 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.
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 Lyden reaches the Gulf of America by way of the Rio Grande: about 1,650 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 Lyden; river miles along the main stem, rounded.
Lyden has a cold semi-arid climate. Summer afternoons average 88° in July; winter nights fall to about 15° in January. A normal year brings about 11 inches of snow; with the rain, that comes to about 11 inches of water.
On November 14 Lyden normally reaches 56° and falls to 22°. The record high is 76°, in 1999; the record low 12°, in 2019. The most rain on this date, 0.56 in, fell in 1985.
Normals 1991–2020 and records since 1953 at Alcalde, 5 miles southwest. NOAA, through RCC-ACIS.
