The Cranberry Isles 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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Cranberry Isles’s center stands about 11 ft above sea level. Within three miles the land runs from 0 ft to 130 ft, a difference of 130 ft: gently rolling country. Open water lies within three miles. The highest named summit within 15 miles is Cadillac Mountain, about 1,520 ft, 7 miles north-northeast.
Under the town center the state geologic map shows Devonian - Silurian Castine Formation (felsic-volcanic, mafic-volcanic), from the Middle Cambrian, 499 to 507 million years old.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 34×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Granite. Age: Devonian, 359 to 422 million years old. About 8 mi of the line.
Felsic-volcanic, mafic-volcanic. Age: Middle Cambrian, 499 to 507 million years old. About 2 mi of the line.
Granite. Age: Devonian, 359 to 422 million years old. About 0.8 mi of the line.
Sandstone, siltstone. Age: Silurian to Devonian, 359 to 445 million years old. About 0.6 mi of the line.
Granite. Age: Devonian, 359 to 422 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.
