This impressive feature of tilted greywacke is separated from the main wall at the top and is free of stone-fall danger except in the white corner and around the scree gully at its base. The climbs can be approached by climbing a two pitch route on the lower Half-Moon Slab or via an easy gully up past the Half-Moon Slab. There is also a direct 2 pitch grade 17 route 'Reservoir Chocks' which climbs the prominent chimney in the bay before Half-moon buttress is reached. (photo)
Hugh Logan, with Paul Scaife made the first ascent of the buttress in Nov 1976 via a line on L edge of the slab, and then continued to the ridge to Mt. Dark via another buttress 70 metres up for four good climbing pitches (with one severe pitch) and had a slightly epical descent down a snow-ice filled Shindig Gully. ; In December 1977 Hugh climbed another line with John Herbison, at a higher grade, to the top of the Buttress just left of the Logan-Scaife route .
Descent is now possible from the top of the Southerly Front Slab all the way to the ground via fixed rap points, lower section equipped in 2021.
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