The Sulphur Rock 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.
Sunny
Partly cloudy; warmer
Sunny
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Mostly sunny
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4.80 inches of rain fell in two days, the most for this week of the year since records began in 1904. The next wettest, 4.09 inches, fell in 1987.
Sulphur Rock’s center stands about 330 ft above sea level. Within three miles the land runs from 260 ft to 560 ft, a difference of 300 ft: rolling country. The highest named summit within 15 miles is Jamestown Mountain, about 1,050 ft, 14 miles west-southwest.
Under the town center the state geologic map shows Moorefield Formation (shale), from the Carboniferous, 324 to 359 million years old.
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 31×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Shale. Age: Carboniferous, 324 to 359 million years old. About 7 mi of the line.
Sandstone. Age: Carboniferous, 299 to 324 million years old. About 4 mi of the line.
Sandstone, shale, limestone. Age: Carboniferous, 324 to 359 million years old. About 3 mi of the line.
Limestone. Age: Carboniferous, 324 to 359 million years old. About 3 mi of the line.
Coarse-detrital, fine-detrital. Age: Pleistocene to Holocene, less than 2.6 million years old. About 2 mi of the line.
Mixed-clastic, carbonate. Age: Cretaceous, 66 to 145 million years old. About 1 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 Sulphur Rock reaches the Gulf of America by way of Big Creek, the White River and the Mississippi: about 910 river miles.
620 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Sulphur Rock; river miles along the main stem, rounded.
Sulphur Rock has a humid subtropical climate. Summer afternoons average 91° in July; winter nights fall to about 28° in January. About 51 inches of rain fall in a normal year, with about 2 inches of snow.
On November 14 Sulphur Rock normally reaches 61° and falls to 39°. The record high is 82°, in 1955; the record low 17°, in 2019. The most rain on this date, 2.27 in, fell in 1957.
Normals 1991–2020 and records since 1904 at Batesville L&D 1, 8 miles west. NOAA, through RCC-ACIS.
