The Germantown 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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11° on Nov. 13, 1976, the coldest reading for this week of the year since 1896. Next is 13° in 1911.
Germantown’s center stands about 960 ft above sea level. Within three miles the land runs from 770 ft to 970 ft, a difference of 200 ft: rolling country.
Under the town center the state geologic map shows Ashlock Formation, Grant Lake and Calloway Creek Limestones, and Fairview Formation, undivided, from the Ordovician, 445 to 487 million years old.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 38×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Limestone. Age: Ordovician, 445 to 487 million years old. About 15 mi of the line.
Shale, limestone. Age: Ordovician, 445 to 487 million years old. About 8 mi of the line.
Limestone, shale. Age: Late Ordovician, 445 to 459 million years old. About 0.8 mi of the line.
Limestone, shale. Age: Late Ordovician, 445 to 459 million years old. About 0.5 mi of the line.
Shale. Age: Middle Ordovician to Late Ordovician, 445 to 471 million years old. About 0.3 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 Germantown reaches the Gulf of America by way of Bracken Creek, the Ohio and the Mississippi: about 1,530 river miles.
970 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Germantown; river miles along the main stem, rounded.
Germantown has a hot-summer humid continental climate. Summer afternoons average 87° in July; winter nights fall to about 23° in January. About 48 inches of rain fall in a normal year.
On November 14 Germantown normally reaches 56° and falls to 34°. The record high is 81°, in 1955; the record low 14°, in 1986. The most rain on this date, 1.72 in, fell in 1951.
Normals 1991–2020 and records since 1896 at Maysville Wastewater Treatment Plant, 10 miles east-northeast, 440 ft lower. NOAA, through RCC-ACIS.
