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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76° on Nov. 11, 2020, the hottest reading for this week of the year since 1893. Next is 74° in 1896.
Youngsville’s center stands about 1,200 ft above sea level. Within three miles the land runs from 1,170 ft to 1,850 ft, a difference of 680 ft: hilly country. The highest named summit within 15 miles is Goose Heaven Hill, about 2,140 ft, 14 miles east-northeast.
Under the town center the state geologic map shows Chadakoin Formation (siltstone, shale), from the Late Devonian, 359 to 384 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 23×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Siltstone, conglomerate. Age: Late Devonian, 359 to 384 million years old. About 10 mi of the line.
Sandstone, shale. Age: Late Devonian, 359 to 384 million years old. About 6 mi of the line.
Sandstone, conglomerate. Age: Carboniferous, 299 to 324 million years old. About 4 mi of the line.
Sandstone, siltstone. Age: Carboniferous, 324 to 359 million years old. About 3 mi of the line.
Shale. Age: Late Devonian, 359 to 384 million years old. About 1 mi of the line.
Siltstone, shale. Age: Late Devonian, 359 to 384 million years old. About 0.9 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 Youngsville reaches the Gulf of America by way of Brokenstraw Creek, the Allegheny, the Ohio and the Mississippi: about 2,130 river miles.
970 miles of the trip are on the Ohio.
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 warm-summer humid continental climate. Summer afternoons average 81° in July; winter nights fall to about 18° in January. A normal year brings about 72 inches of snow; with the rain, that comes to about 47 inches of water.
On November 14 Youngsville normally reaches 48° and falls to 32°. The record high is 69°, in 1989; the record low 6°, in 1920. The most rain on this date, 1.27 in, fell in 1972.
Normals 1991–2020 and records since 1893 at Warren, 9 miles east. NOAA, through RCC-ACIS.
