The Adamstown 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.
Partly cloudy
Mostly cloudy; warmer
Mostly sunny
Sunny
Partly cloudy
Mostly sunny
Mostly sunny
16° on Nov. 16, 1996, the coldest reading for this week of the year since 1993. Next is 18° in 2017.
Adamstown’s center stands about 320 ft above sea level. Within three miles the land runs from 230 ft to 560 ft, a difference of 330 ft: rolling country. The highest named summit within 15 miles is Lambs Knoll, about 1,760 ft, 13 miles northwest.
Under the town center the state geologic map shows Frederick Limestone, from the Cambrian, 487 to 542 million years old.
The section below crosses 12 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 21×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Gneiss. Age: Precambrian. About 7 mi of the line.
Phyllite. Age: Proterozoic, 542 to 2,500 million years old. About 5 mi of the line.
Limestone. Age: Cambrian, 487 to 542 million years old. About 3 mi of the line.
Phyllite, metasiltstone. Age: Proterozoic, 542 to 2,500 million years old. About 2 mi of the line.
Metabasalt. Age: Proterozoic to Mesoproterozoic, 1 to 2.5 billion years old. About 2 mi of the line.
Quartzite. Age: Proterozoic, 542 to 2,500 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. 6 smaller units along the line are not listed.
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 Adamstown reaches Chesapeake Bay and the Atlantic Ocean by way of Tuscarora Creek and the Potomac: about 160 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Adamstown; river miles along the main stem, rounded.
Adamstown has a hot-summer humid continental climate. Summer afternoons average 84° in July; winter nights fall to about 25° in January. A normal year brings about 31 inches of snow; with the rain, that comes to about 48 inches of water.
On November 14 Adamstown normally reaches 54° and falls to 37°. The record high is 74°, in 1993; the record low 22°, in 2019. The most rain on this date, 1.90 in, fell in 1995.
Normals 1991–2020 and records since 1993 at Damascus 3 SSW, 13 miles east-southeast, 380 ft higher. NOAA, through RCC-ACIS.
