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The West Antarctic rift system, a propagating rift "captured" by a mantle plume The West Antarctic rift system, a propagating rift "captured" by a mantle plume

The West Antarctic rift system, marked by a 3-5-kilometer high shoulder from northern Victoria Land to the Ellsworth Mountains, extends through the Ross Embayment and the Byrd Subglacial Basin. Geophysical data suggest that the ice covered area beneath the rift zone is underlain by Cenozoic volcanic rocks (flood basalts?), and extended crust about 20 km thick. Exposed bimodal alkaline...
Authors
John C. Behrendt, W.E. LeMasurier, Alan K. Cooper
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