The Green Hill 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
Mostly sunny; warmer
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15° on Nov. 13, 2019, the coldest reading for this week of the year since 1990. Next is 20° in 1997.
Green Hill’s center stands about 650 ft above sea level. Within three miles the land runs from 440 ft to 680 ft, a difference of 240 ft: rolling country. The highest named summit within 15 miles is Fourmile Hill, about 1,050 ft, 13 miles east-southeast.
Under the town center the state geologic map shows Nashville Group; Bigby-Cannon Limestone and Hermitage Formation (limestone, calcarenite), 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 53×. 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 8 mi of the line.
Limestone, calcarenite. Age: Ordovician, 445 to 487 million years old. About 6 mi of the line.
Shale, limestone. Age: Ordovician, 445 to 487 million years old. About 4 mi of the line.
Fine-detrital, coarse-detrital. Age: Quaternary, less than 2.6 million years old. About 2 mi of the line.
Limestone. Age: Ordovician, 445 to 487 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.
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 Green Hill reaches the Gulf of America by way of Schutes Branch, the Cumberland, the Ohio and the Mississippi: about 1,250 river miles.
Lake on the way: Bards Lake.
970 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Green Hill; river miles along the main stem, rounded.
Green Hill has a humid subtropical climate. Summer afternoons average 89° in July; winter nights fall to about 28° in January. About 55 inches of rain fall in a normal year, with about 5 inches of snow.
On November 14 Green Hill normally reaches 60° and falls to 38°. The record high is 76°, in 1993; the record low 17°, in 2019. The most rain on this date, 1.18 in, fell in 1993.
Normals 1991–2020 and records since 1990 at Old Hickory Wfo, here. NOAA, through RCC-ACIS.
