The Bridgewater 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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Bridgewater’s center stands about 2,040 ft above sea level. Within three miles the land runs from 1,030 ft to 2,570 ft, a difference of 1,540 ft: steep hill country. The highest named summit within 15 miles is Killington Peak, about 4,190 ft, 7 miles west-southwest.
The section below crosses 17 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 6×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Phyllite, limestone. Age: Silurian to Early Devonian, 394 to 425 million years old. About 4 mi of the line.
Paragneiss, quartz-feldspar-schist. Age: Mesoproterozoic, 1.2 to 1.4 billion years old. About 4 mi of the line.
Mica-schist, quartzite. Age: Early Devonian, 394 to 422 million years old. About 3 mi of the line.
Phyllite. Age: Cambrian, 487 to 542 million years old. About 3 mi of the line.
Paragneiss. Age: Mesoproterozoic, 1 to 1.2 billion years old. About 1 mi of the line.
Phyllite, mica-schist. Age: Silurian to Early Devonian, 394 to 425 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. 11 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 Bridgewater reaches Long Island Sound and the Atlantic Ocean by way of Cold Brook, the Ottauquechee and the Connecticut: about 240 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Bridgewater; river miles along the main stem, rounded.
