The Searsburg 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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Searsburg’s center stands about 1,730 ft above sea level. Within three miles the land runs from 1,540 ft to 3,110 ft, a difference of 1,570 ft: steep hill country. The highest named summit within 15 miles is Stratton Mountain, about 3,940 ft, 14 miles north.
The section below crosses 14 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 8×. 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: Mesoproterozoic, 1.2 to 1.6 billion years old. About 7 mi of the line.
Paragneiss. Age: Neoproterozoic, 938 to 969 million years old. About 4 mi of the line.
Paragneiss. Age: Mesoproterozoic, 1.2 to 1.2 billion years old. About 3 mi of the line.
Schist. Age: Mesoproterozoic, 1.2 to 1.4 billion years old. About 3 mi of the line.
Granofels. Age: Neoproterozoic to Early Cambrian, 521 to 1,000 million years old. About 2 mi of the line.
Quartz-feldspar-schist. Age: Cambrian to Early Ordovician, 471 to 542 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. 8 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 Searsburg reaches Long Island Sound and the Atlantic Ocean by way of Bond Brook, the Deerfield and the Connecticut: about 180 river miles.
120 miles of the trip are on the Connecticut.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Searsburg; river miles along the main stem, rounded.
