The Dennard 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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10° on Nov. 17, 1959, the coldest reading for this week of the year since 1892. Next is 10° in 1986.
Dennard’s center stands about 1,510 ft above sea level. Within three miles the land runs from 900 ft to 1,690 ft, a difference of 790 ft: hilly country. The highest named summit within 15 miles is Reves Knob, about 2,050 ft, 12 miles west.
Under the town center the state geologic map shows Bloyd Shale, and Prairie Grove Member of the Hale Formation (shale, sandstone), from the Carboniferous, 299 to 324 million years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 17×. 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, sandstone. Age: Carboniferous, 299 to 324 million years old. About 15 mi of the line.
Sandstone. Age: Carboniferous, 299 to 324 million years old. About 9 mi of the line.
Sandstone, shale, limestone. Age: Carboniferous, 324 to 359 million years old. About 0.6 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 Dennard reaches the Gulf of America by way of Hartsugg Creek, Archey Creek, the Little Red, the White River and the Mississippi: about 930 river miles.
Lake on the way: Greers Ferry Lake.
620 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Dennard; river miles along the main stem, rounded.
Dennard has a humid subtropical climate. Summer afternoons average 89° in July; winter nights fall to about 26° in January. About 48 inches of rain fall in a normal year, with about 4 inches of snow.
On November 14 Dennard normally reaches 60° and falls to 38°. The record high is 81°, in 1999; the record low 10°, in 1986. The most rain on this date, 2.55 in, fell in 1926.
Normals 1991–2020 and records since 1892 at Marshall, 13 miles northwest, 560 ft lower. NOAA, through RCC-ACIS.
