Figure F5. Pre-Mesozoic geology of the Lambert Glacier drainage basin and Prydz Bay region after Tingey (1982) and Federov et al. (1982). Late Proterozoic metamorphic rocks in the northern Prince Charles Mountains, Mac. Robertson Land, and Ingrid Christensen Coast are mostly granulite facies. The southern Prince Charles Mountains metasediments are generally chlorite grade in some outcrops displaying primary sedimentary structures. Not shown are Mesozoic and Eocene basic igneous dykes in the Beaver Lake area.