The Youngsville 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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11° on Nov. 17, 2000, the coldest reading for this week of the year since 1957. Next is 12° in 2018.
Youngsville’s center stands about 6,840 ft above sea level. Within three miles the land runs from 6,350 ft to 8,430 ft, a difference of 2,080 ft: mountain country. The highest named summit within 15 miles is Polvadera Peak, about 11,230 ft, 12 miles southeast.
The section below crosses 11 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 5×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone, conglomerate. Age: Late Pennsylvanian to Permian, 284 to 307 million years old. About 4 mi of the line.
Sandstone. Age: Late Cretaceous, 94 to 100 million years old. About 4 mi of the line.
Sandstone, shale, limestone. Age: Middle Jurassic to Late Jurassic, 145 to 175 million years old. About 3 mi of the line.
Dacite, rhyolite. Age: Miocene, 5.3 to 23 million years old. About 3 mi of the line.
Felsic-volcanic. Age: Pleistocene, 1.8 to 2.6 million years old. About 3 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.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 5 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 Youngsville reaches the Gulf of America by way of the Rito Encino, the Rio Puerco, the Rio Chama and the Rio Grande: about 1,690 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 Youngsville; river miles along the main stem, rounded.
Youngsville has a cold semi-arid climate. Summer afternoons average 88° in July; winter nights fall to about 18° in January. A normal year brings about 10 inches of snow; with the rain, that comes to about 10 inches of water.
On November 14 Youngsville normally reaches 54° and falls to 28°. The record high is 70°, in 2019; the record low 12°, in 2018. The most rain on this date, 0.41 in, fell in 1991.
Normals 1991–2020 and records since 1957 at Abiquiu Dam, 8 miles east-northeast, 460 ft lower. NOAA, through RCC-ACIS.
