The Blaine 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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Blaine’s center stands about 520 ft above sea level. Within three miles the land runs from 390 ft to 1,320 ft, a difference of 930 ft: steep hill country. The highest named summit within 15 miles is Mars Hill, about 1,730 ft, 3 miles east-northeast.
Under the town center the state geologic map shows Silurian - Ordovician Carys Mills Formation (siltstone, limestone), from the Late Ordovician to Silurian, 434 to 459 million years old.
The section below crosses 8 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 13×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Siltstone, limestone. Age: Late Ordovician to Silurian, 434 to 459 million years old. About 6 mi of the line.
Mudstone. Age: Devonian, 359 to 422 million years old. About 3 mi of the line.
Graywacke, slate. Age: Ordovician, 445 to 487 million years old. About 2 mi of the line.
Mudstone, sandstone. Age: Ordovician to Silurian, 422 to 487 million years old. About 2 mi of the line.
Mafic-volcanic, felsic-volcanic. Age: Ordovician to Silurian, 422 to 487 million years old. About 1 mi of the line.
Conglomerate. Age: Ordovician to Silurian, 422 to 487 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. 2 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 Blaine reaches the Bay of Fundy and the Atlantic Ocean by way of the Prestile Stream and the Saint John: about 170 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Blaine; river miles along the main stem, rounded.
