title: Glaciation in taylor valley, antarctica, older than 2.7 million years.
abstract: 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.
authors.forename: R L
authors.initials: RL
authors.lastname: Armstrong
authors.forename: W
authors.initials: W
authors.lastname: Hamilton
authors.forename: G H
authors.initials: GH
authors.lastname: Denton