Editing Geography of Antarctica (section)

=== Conditions of formation ===
In West Antarctica's Marie Byrd Land, volcanoes are typically composed of alkaline and [[basalt|basaltic]] lava. Sometimes, the volcanoes are entirely basaltic in composition. Due to the geographic similarity of the Marie Byrd Land, it is believed that the volcanoes in the West Antarctic Rift System are also composed of basalt.<ref name=":03"/>

Above-ice basaltic volcanoes, also known as subaerial basaltic volcanoes, generally form in tall, broad cone shapes.<ref name=":03"/> Since they are formed from repeated piling of liquid magma sourced from the center, they spread widely and grow upwards relatively slowly.<ref>{{Cite web|url=http://volcano.oregonstate.edu/book/export/html/198|title=Types of Volcanoes|website=volcano.oregonstate.edu|access-date=28 January 2019}}</ref> However, West Antarctic Volcanoes form underneath ice sheets, and are thus categorized as subglacial volcanoes. Subglacial volcanoes that are [[Monogenetic volcanic field|monogenetic]] are far more narrow, steeper, flat topped structures. [[Polygenetic volcanic field|Polygenetic]] subglacial volcanoes have a wider variety of shapes and sizes due to being made up of many different eruptions. Often, they look more cone shaped, like [[stratovolcano]]es.