According to some reports glaciers occur within the caldera at elevations above , while other reports indicate the absence of perennial snow on the mountain. Glacial valleys and moraines have been recognized on the eastern, southeastern and southern slopes of the volcano, and cirques have been found at elevation. These landforms suggest that the mountain was formerly glaciated. Three sets of moraines have been described, one at elevation possibly linked to the last glacial maximum, an older one at elevation and a third at elevation which may have formed during the Little Ice Age; moraines reach thicknesses of . There is an additional set of moraines at elevation that has been correlated to pre-last glacial maximum glaciations, as well as traces of ice cored moraines and rock glaciers. Some rock glaciers still exist; unlike other glacial bodies in Chile the fronts of rock glaciers on Tacora are not retreating.