The volcano is covered by glaciers, and thus only a few rocky outcrops occur on the mountain although the volcano is considered to be well-exposed compared to other volcanoes in the region. Monogenetic volcanoes on the northern flank of Mount Berlin have generated two outcrops of mafic lava and scoria, one of which is found at Mefford Knoll on a linear vent. On the southeastern flank, a fiamme-rich ignimbrite crops out and is correlated to a flank vent on the northeastern flank. A ridge emanates northwestward from Merrem Peak, with Brandenberger Bluff at its foot. Brandenberger Bluff is a high outcrop of lava and tuff that formed phreatomagmatically; it was formerly interpreted as a subglacial hyaloclastite. Other topographical locations on Mount Berlin are Fields Peak on the northern flank, Kraut Rocks at the west-southwestern foot, Walts Cliff on the northeastern flank and Wedemeyer Rocks at the southern foot. Nonvolcanic features include incipient cirques on the northern and western side.