The relationship between the structure of Shapeless Mountain and the volcanics of the Mawson Formation

Shapeless Mountain appears so because it is quite irregular structurally in contrast to the consistent near-horizontal stratification in the Beacon Supergroup elsewhere. Shapeless Mountain also has outcrops of the Mawson Formation, which at Allan Hills has been interpreted as volcanic mudflow deposits. The aim of this study was to determine the nature of the Mawson Formation, and to study the structural geology in detail to establish any relationship between the structure of Shapeless Mountain and the volcanics of the Mawson Formation.