CHARAKTERYSTYKA PETROGRAFICZNA SKAŁ POCHODZĄCYCH ZE STRUKTURY IMPAKTOWEJ GARDNOS, NORWEGIA

Abstract

PETROGRAPHIC CHARCTERSITICS OF THE ROCKS FROM THE IMPACT STRUCTURE GARDNOS, NORWAYAbstract. The crater of the Gardnos meteorite is located in Norway, about 125 km north-west of Oslo. The structure is well seen due to the outcrops of impact breccias and post-impact deposits that form a circle with a radius of about 5 km. Main types of the impact rocks in the Gardnos area are the autochthonous Gardnos breccia and its cover – allochthonous suevite breccia. The petrological characteristics of these rocks are presented. The Gardnos breccia is a lithic breccia, composed of fissured rock fragments, without melt components. The suevite is a polymictic breccia, built of small fragments composed of recrystallized melt and clasts of rocks and minerals.