page_title: McMurdo Volcanic Group
section_title: Hallett Volcanic Province
hierarchical_section_title: McMurdo Volcanic Group / Subdivisions / Hallett Volcanic Province
caption_attribution_description: Coulman Island in the Ross Sea with clouds forming at the top edge as cold air spills down off the island top.
context_page_description: The McMurdo Volcanic Group is a large group of Cenozoic volcanic rocks in the western Ross Sea and central Transantarctic Mountains areas of Antarctica. It is one of the largest provinces of alkaline volcanism in the world, having formed as a result of continental rifting along the West Antarctic Rift System.
  The McMurdo Volcanic Group is part of the Western Ross Supergroup, a stratigraphic unit that also includes the Meander Intrusive Group.
context_section_description: The Hallett Volcanic Province in northern Victoria Land is situated along the margin of the Transantarctic Mountains. It consists of a 260 km (160 mi) long chain of four major elongated shield volcano complexes that were originally interpreted to have erupted subglacially under a larger Antarctic ice sheet. Later studies showed that they erupted in a subaerial environment instead.
caption: Coulman Island in the Ross Sea is part of the Hallett Volcanic Province.
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