W. Hamilton G.H. Denton R.L. Armstrong 1968 Potassium-argon dates for three samples of basaltic scoria from Taylor Valley, on the west side of McMurdo Sound, indicate that the basalt, which antedates and postdates major glaciations, is at least 2.7 million years old. application/pdf 10.1126/science.159.3811.187 en American Association for the Advancement of Science Glaciation in Taylor Valley, Antarctica, older than 2.7 million years article