The Palmyra 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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80° on Nov. 11, 2020, the hottest reading for this week of the year since 1948. Next is 77° in 2010.
Palmyra’s center stands about 770 ft above sea level. Within three miles the land runs from 640 ft to 870 ft, a difference of 230 ft: rolling country. The highest named summit within 15 miles is Smith Hill, about 1,000 ft, 13 miles north-northwest.
Under the town center the state geologic map shows Blue River Group (limestone), 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 49×. 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: Carboniferous, 324 to 359 million years old. About 15 mi of the line.
Siltstone. Age: Carboniferous, 324 to 359 million years old. About 4 mi of the line.
Limestone. Age: Carboniferous, 324 to 359 million years old. About 4 mi of the line.
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 Palmyra reaches the Gulf of America by way of Licking Creek, the Blue River, the Ohio and the Mississippi: about 1,350 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 Palmyra; river miles along the main stem, rounded.
Palmyra 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.
Normals 1991–2020 and records since 1948 at Louisville Mcalpine, 19 miles east-southeast, 330 ft lower. NOAA, through RCC-ACIS.
