Radial fissure vents are found around the volcano, and vents also occur around the caldera rim. There are at least three parasitic vents with basaltic composition on its lower flanks, with three cinder cones found on the western and southern slopes. One of these cinder cones has been described as a subdued vent. The Jaron Cliffs are found on the southern slope. The volcano is largely uneroded and thus exposures of its internal structure that would allow reconstructing its history are rare. Only twelve outcrops, with a total area of less than , emerge from the ice that covers Mount Takahe. The interior structure of the volcano is unknown. Based on these outcrops, lava flows with a thickness of appear to be widespread on Mount Takahe, while pyroclastic rocks such as deposits of Strombolian eruptions, lapilli tuffs and lahar deposits are less common. Occurrences of pyroclastic rocks at the summit have been correlated with tephra deposits elsewhere in Antarctica. Additional, obsidian-bearing and recently erupted lava bomb-and-block units crop out in the caldera rim, at Bucher Rim. Tuyas reportedly exist at Mount Takahe. Glaciation Mount Takahe is almost entirely covered by ice of the West Antarctic Ice Sheet, which rises about above sea level. A tributary of the Thwaites Glacier passes close to Mount Takahe. There are two small glaciers on the volcano itself, on the southwestern and northern flanks. They are eroding eruption products from the summit area, and moraines have been mapped both on the western flank and in the summit caldera. Glacial erosion is not pronounced, only a few corries cut into the lower slopes. The ice cover on the mountain includes both snow-covered and ice-covered areas, with sastrugi and other wind-roughened surfaces. The polar environment is cold and dry, which slows weathering processes. Air temperatures recorded at Mount Takahe are usually below freezing. Some rock units at the foot of the volcano were emplaced underneath ice or water and feature hyaloclastite and pillow lavas. These units rise to about above the present-day ice level. Some of these units, such as Gill Bluff, Möll Spur and Stauffer Bluff, are "hydrovolcanic deltas" comparable to lava deltas which formed when lava flows from Mount Takahe or parasitic vents entered the ice, generating meltwater lakes surrounding the lavas. They crop out at the base of the volcano and are well preserved. Ice elevation was not stable during the emplacement of these