The Mount Morris 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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7° on Nov. 16, 1933, the coldest reading for this week of the year since 1872. Next is 10° in 1967.
Mount Morris’s center stands about 930 ft above sea level. Within three miles the land runs from 900 ft to 1,470 ft, a difference of 570 ft: hilly country. The highest named summit within 15 miles is Catherines Knob, about 1,710 ft, 11 miles southwest.
Under the town center the state geologic map shows Waynesburg Formation (sandstone, shale), from the Carboniferous to Permian, 252 to 324 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.
Sandstone, siltstone, shale. Age: Carboniferous to Permian, 252 to 324 million years old. About 7 mi of the line.
Limestone, shale, sandstone. Age: Carboniferous, 299 to 324 million years old. About 5 mi of the line.
Shale, clastic. Age: Carboniferous, 299 to 324 million years old. About 5 mi of the line.
Sandstone, shale. Age: Carboniferous to Permian, 252 to 324 million years old. About 4 mi of the line.
Fine-detrital, coarse-detrital. Age: Quaternary, less than 2.6 million years old. About 3 mi of the line.
Sandstone, shale. Age: Permian, 252 to 299 million years old. About 0.4 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 Mount Morris reaches the Gulf of America by way of Dunkard Creek, the Monongahela, the Ohio and the Mississippi: about 2,050 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 Mount Morris; river miles along the main stem, rounded.
Mount Morris has a hot-summer humid continental climate. Summer afternoons average 84° in July; winter nights fall to about 24° in January. About 43 inches of rain fall in a normal year.
On November 14 Mount Morris normally reaches 55° and falls to 36°. The record high is 78°, in 1993; the record low 10°, in 1986. The most rain on this date, 0.91 in, fell in 1995.
Normals 1991–2020 and records since 1872 from the Morgantown Area threaded record (Morgantown Municipal Airport, 10 miles southeast, 300 ft higher). NOAA, through RCC-ACIS.
