At the top of Monte Zoufplan are outcrops of the sandstones and pelites of the Dimon Formation. From the top it is possible to look towards the north-west and the Monte Cogliàns group, consisting mainly of Devonian limestones. At 2,780 m asl, Monte Cogliàns is the highest peak in the Region and represents the main nucleus of the most imposing organogenic reef from the Palaeozoic visible in Europe today. Two geosites of supranational interest have been identified within the Cogliàns group: the “Devonian reef of Monte Cogliàns” and the “Creta della Chianevate, Chialderate and Monumenz: Devonian limestones, karstic phenomena and glacialism”.