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Updated: May 15, 2025
In the central region the gneiss is covered by transition or sub-metamorphic rocks, consisting of a strong band of quartzites overlying a mass of earthy schists.
In the very centre of the range, where the table-land attains its highest elevation, great masses of intrusive diorite and granite occur; and the latter is found in dykes piercing the gneiss and sub-metamorphic series throughout the southern half of the boundary of the plains.
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