The Fawn Grove 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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20° on Nov. 12, 2017, the coldest reading for this week of the year since 1948. Next is 21° in 2023.
Fawn Grove’s center stands about 700 ft above sea level. Within three miles the land runs from 470 ft to 800 ft, a difference of 330 ft: rolling country.
Under the town center the state geologic map shows Octoraro Formation (schist, phyllite), from the Paleozoic, 252 to 542 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 23×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Schist, phyllite. Age: Paleozoic, 252 to 542 million years old. About 16 mi of the line.
Mica-schist, quartzite. Age: Paleozoic, 252 to 542 million years old. About 7 mi of the line.
Slate, conglomerate. Age: Paleozoic, 252 to 542 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 Fawn Grove reaches Chesapeake Bay and the Atlantic Ocean by way of Bald Eagle Creek, Muddy Creek and the Susquehanna: about 40 river miles.
Lake on the way: Lake Aldred.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Fawn Grove; river miles along the main stem, rounded.
Fawn Grove has a hot-summer humid continental climate. Summer afternoons average 87° in July; winter nights fall to about 25° in January. A normal year brings about 21 inches of snow; with the rain, that comes to about 46 inches of water.
Normals 1991–2020 and records since 1948 at Safe Harbor Dam, 14 miles north-northeast, 500 ft lower. NOAA, through RCC-ACIS.
