Blue Mountain is in the Wombat State Forest, 100 km west of Melbourne, in the old gold mining region near the towns of Trentham and Newbury.
The mountain is a steep high lava volcano with a broad lava flow to the northwest. The mountain consists of two slightly differing types of trachyte lava - the bulk of the mountain and the northern flow are of anorthoclase trachyte while a small flow near the summit is a coarser rock with phenocrysts of feldspar.
The Summit is at 837 m, rising 120 m from the flat area near Newbury.
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Australia
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