The bedrock of the landscape around Gold Butte Peak and nearby Bonelli Peak consist of gray, Proterozoic, porphyritic perthite-quartz-biotite granites and quartz monzonites that are also classified as rapakivi granite.
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This area also contains some younger ( ca . 1.5-1.65 Ga ) Rapakivi granites as well as Jotnian sandstones ( ca . 1.2-1.5 Ga ).
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The rest of the hallway is also filled with a hardenend mass of sediments, such as clay, sand, silt and rapakivi, inside straight walls, a ceiling and a floor consisting of bedrock ( granite ).
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A two-hour journey from Langnas port near Mariehamn, ferryboats glide under bright, cornflower skies filled with playing seagulls and cotton-ball clouds past dozens of sea-swept, wind-smoothed rapakivi _ gray and pink granite outcroppings in the water.
