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Black Sands Beach
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Weather and marine data: Open-Meteo
Black Sands Beach
Black Sands Beach stretches along the coast of Northern California, about 25 kilometers south of San Francisco. The coordinates (37.82°N / 122.51°O) place this shore within the San Francisco Bay, where the coastline alternates between steep cliffs and sandy coves. The area is characterized by cold and often rough waters, typical of the northern California Pacific coast, with a background of sparse coastal vegetation and volcanic geological formations.
About this spot
The name 'Black Sands' directly evokes the mineral composition of this beach: the black sand comes from the erosion of volcanic rocks, a geological heritage common to the coasts of Northern California. This region, shaped by the tectonic activity of the San Andreas Fault and ancient lava fields, bears visible traces of its volcanic past. Historically, these black beaches have attracted amateur geologists and mineral collectors, fascinated by the magnetite and other iron-rich minerals that sparkle under the sun.
Updated 5/9/2026
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