Millen Schist

These rocks were originally referred to as the Millen Range Schists by Findlay and Field (1983) but are now known as the MiUen Schist (GANOVEX 1987) based on their occurrence in the Millen Range (72°20 S, 166°15 E) east of the Leap Year Fault in the Robertson Bay Terrane. The Millen Schist has been traced all the way to the most northerly part of the Bowers Mountains and southeast to the Malta Plateau (72°58 S, 167°18 E). 

The rocks consist of quartz-feldspar schist and phyllite derived from sedimentary protoliths of the Robertson Bay Group, from the Molar Formation (Sledgers Group), and from metavolcanic rocks of mafic composition. In contrast to the rocks of the Robertson Bay Group, the Millen Schist was multiply deformed (Bradshaw et al. 1982 Jordan et al. 1984 Findlay 1986) presumably during tectonic activity along the boundary fault. 

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