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. ... (more)