A series of eruptions about 200 years long took place at Mount Takahe 17,700years ago. These eruptions have been recorded from ice cores at the WAIS Divide and at Taylor Glacier in the McMurdo Dry Valleys, where they constrain estimates of the rate of deglaciation. These eruptions released a large quantity of halogens into the stratosphere, which together with the cold and dry climate conditions of the last glacial maximum would presumably have led to massive ozone destruction and the formation of an ozone hole. Bromine and sulfur isotope data indicate that the amount of UV radiation in the atmosphere did increase at that time in Antarctica. As is the case with the present-day ozone hole, the ozone hole created by the Takahe eruptions might have altered the Antarctic climate and sped up deglaciation, which was accelerating at that time, but later research has determined that the warming was most likely not volcanically forced.