Grange, L.I. 1937 The geology of the Rotorua-Taupo subdivision, Rotorua and Kaimanawa divisions. Wellington: Government Printer. New Zealand Geological Survey bulletin 37 138 p.
Abstract: This bulletin describes the physiography and areal geology of 2,090 square miles of the active volcanic region of the North Island. The district, on account of its innumerable hot springs and other thermal phenomena, is an increasingly popular tourist and health resort. The principal industries are sawmilling and farming. The native forests yield much valuable timber, and exotic trees, now planted over millions of acres, will make the region one of the chief sources of forest products in New Zealand. Agriculture and grazing, long retarded by poor access and the prevalent deficiency diseases of stock, are likely to develop greatly. The mining industry so far has contributed little except a few hundred tons of sulphur, but there are large resources of diatomite, pumice, and pozzolana at present quite unutilized. (auth/DG)