The Glenn Springs 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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3.09 inches of rain fell in two days, the most for this week of the year since records began in 1983. The next wettest, 2.79 inches, fell in 2018.
Glenn Springs’s center stands about 770 ft above sea level. Within three miles the land runs from 550 ft to 790 ft, a difference of 240 ft: rolling country.
Under the town center the state geologic map shows Gneiss of Laurens area (biotite-gneiss), from the Neoproterozoic to Cambrian, 487 to 1,000 million years old.
The section below crosses 9 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 48×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Biotite-gneiss. Age: Neoproterozoic to Cambrian, 487 to 1,000 million years old. About 6 mi of the line.
Metavolcanic. Age: Neoproterozoic, 542 to 1,000 million years old. About 5 mi of the line.
Biotite-gneiss. Age: Neoproterozoic to Cambrian, 487 to 1,000 million years old. About 3 mi of the line.
Metadiorite. Age: Neoproterozoic to Ordovician, 445 to 1,000 million years old. About 3 mi of the line.
Amphibolite. Age: Neoproterozoic to Cambrian, 487 to 1,000 million years old. About 2 mi of the line.
Mica-schist. Age: Neoproterozoic to Cambrian, 487 to 1,000 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. 3 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 Glenn Springs reaches the Atlantic Ocean by way of Wiley Fork Creek, Dutchman Creek, the Tyger, the Broad, the Congaree, the Santee and the South Santee: about 270 river miles.
Lake on the way: Lib Pines Lake.
70 miles of the trip are on the Santee.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Glenn Springs; river miles along the main stem, rounded.
Glenn Springs has a humid subtropical climate. Summer afternoons average 90° in July; winter nights fall to about 31° in January. About 50 inches of rain fall in a normal year.
On November 14 Glenn Springs normally reaches 64° and falls to 38°. The record high is 79°, in 2007; the record low 19°, in 2013. The most rain on this date, 1.33 in, fell in 2024.
Normals 1991–2020 and records since 1983 at Spartanburg 3 SSE, 8 miles north-northwest, 160 ft lower. NOAA, through RCC-ACIS.
