The Karthaus 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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75° on Nov. 11, 2020, the hottest reading for this week of the year since 1982. Next is 68° in 2012.
Karthaus’s center stands about 940 ft above sea level. Within three miles the land runs from 840 ft to 1,670 ft, a difference of 830 ft: hilly country. The highest named summit within 15 miles is Big Knob, about 2,340 ft, 11 miles west.
Under the town center the state geologic map shows Burgoon Sandstone, from the Carboniferous, 324 to 359 million years old.
The section below crosses 4 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 14×. 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: Carboniferous, 299 to 324 million years old. About 12 mi of the line.
Sandstone. 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.
Shale, siltstone, sandstone. Age: Carboniferous, 324 to 359 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.
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 Karthaus reaches Chesapeake Bay and the Atlantic Ocean by way of Mosquito Creek, the West Branch Susquehanna and the Susquehanna: about 260 river miles.
Lake on the way: Lake Aldred.
130 miles of the trip are on the West Branch Susquehanna.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Karthaus; river miles along the main stem, rounded.
Karthaus has a cold desert climate. Summer afternoons average 82° in July; winter nights fall to about 18° in January. Barely 0.0 inches of rain fall in a normal year.
Normals 1991–2020 and records since 1982 at Alvin R Bush Dam, 19 miles north-northeast. NOAA, through RCC-ACIS.
