Kolsås is a wooded mountain ridge in the municipality of Bærum, Norway. Geologically, Kolsås belongs to the Oslo Graben area. Its two peaks consist of hard rhomb porphyriclava covering softer rocks, forming steep cliffs to the east, south and west.
Kolsås is a wooded mountain ridge in the municipality of Bærum, Norway. Geologically, Kolsås belongs to the Oslo Graben area. Its two peaks consist of hard rhomb porphyriclava covering softer rocks, forming steep cliffs to the east, south and west.