The graben has been correlated with the coal bearing Godavari Valley of the Indian Peninsula prior to the breakup of Gondwana.
[1] The graben is a Late Palaeozoic-Mesozoic triple junction failed rift.
Precambrian metamorphic rocks, composed of granulite-facies sequences intruded by granites and pegmatites, are overlain by the Permian sedimentary Amery Group.
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