Field, B.D. 1985 Stratigraphic drillholes at Charteris Bay, Lyttelton Harbour, Christchurch. Lower Hutt: New Zealand Geological Survey. New Zealand Geological Survey report SL 11 11 p.
Abstract: Two stratigraphic drillholes at Charteris Bay have shown the Charteris Bay Sandstone is underlaid by carbonaceous sandstone and flows of rhyolite and andesite interbedded with conglomerate derived from both volcanic rocks and Torlesse Supergroup. Through the flow units have not been dated successfully they probably correlate with the Mount Somers Volcanics of the central Canterbury foothills and are therefore probably Cretaceous