Post 3.9 Ma fault activity within the West Antarctic rift system: onshore evidence from Gandalf Ridge, Mount Morning eruptive centre, southern Victoria Land, Antarctica

• Published in: Antarctic Science
• Main Authors: Martin, Adam P., Cooper, Alan F.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 2010
• Subjects: Geology; Ecology, Evolution, Behavior and Systematics; Oceanography; Antarctic; Ross Sea; Victoria Land; Mount Morning; Gandalf Ridge; Antarc*; Antarctic Science; Antarctica
• Online Access: http://dx.doi.org/10.1017/s095410201000026x; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S095410201000026X

Abstract A hawaiite dyke dated at 3.88 ± 0.05 Ma from the Mount Morning eruptive centre intrudes a diamictite deposit at Gandalf Ridge in the southern Ross Sea. The dyke has been dextrally offset up to 6 m horizontally by faults interpreted as the onshore continuation of the West Antarctic rift syst...