The East Haven 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.
Chance of showers
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East Haven’s center stands about 2,450 ft above sea level. Within three miles the land runs from 1,510 ft to 3,230 ft, a difference of 1,720 ft: steep hill country. The highest named summit within 15 miles is Savage Mountain, about 3,510 ft, 14 miles east-northeast.
Under the town center the state geologic map shows Gile Mountain Formation - quartzite and metapelite member, from the Early Devonian, 394 to 422 million years old.
The section below crosses 6 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.
Phyllite, limestone. Age: Silurian to Early Devonian, 394 to 425 million years old. About 8 mi of the line.
Granite. Age: Devonian, 359 to 422 million years old. About 6 mi of the line.
Quartzite. Age: Early Devonian, 394 to 422 million years old. About 5 mi of the line.
Metasandstone, metasiltstone, phyllite. Age: Middle Cambrian to Early Ordovician, 485 to 500 million years old. About 3 mi of the line.
Slate, phyllite. Age: Early Devonian, 394 to 422 million years old. About 0.8 mi of the line.
Metaclastic. Age: Silurian, 422 to 445 million years old. About 0.4 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 East Haven reaches Long Island Sound and the Atlantic Ocean by way of the West Branch Moose, the Moose, the Passumpsic and the Connecticut: about 320 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of East Haven; river miles along the main stem, rounded.
