340 REPORTS OF RESEARCH COMMITTEES. 



In tllo Annua] Reports of the Geological Survey Morgan has 

 expressed agreement with Henderson that entrenchment of valleys 

 in the Kiapara district, North Auckland, is the result of slight 

 uplift f O'lloiwing the drowning of the estuaries* ; hasi referred to 

 the fault which forms the eastern front of the Seaward Kaikoura 

 Range, and noticed a. raised beach and higher wave-cut platforms 

 along the coast of Marlborough, indicating a series of uplifts total- 

 ling about 600 feetf ; and has described an explosive eruption at 

 Frying Pan Flat in 19174 



J. Park§ has described and published photographs of a striated 

 andesite boulder, 14 feet long, in the Rangitikei Valley, below 

 Mangeweka, the transportation of which he ascribes to a glacier 

 with its source on Mount Riiapehii. 



Park has also criticized the data bearing on the rate of erosioii 

 of the Hooker and Mueller glaciers obtained by Marshall (iit 

 supra), stating that much of the silt carried by the Hooker River 

 is derived otherwise than by glacial scouring. || 



Park^ describe® the Oamaru district asi a dissected tableland 

 240 feet to 300 feet above sea-level — " in part an old peneplained 

 land svirface," but " mainly a raised ancient flood-plain of 'the 

 Waitaki River." It is " a faulted block, bounded on the north by 

 the Waitaki Valley fault." Above this tableland rises a monad- 

 nock. At the base of an ancient sea-cliff lies a narrow coastal 

 plain indicating emergence of 25 feet. At the margin of this the 

 sea in encroaching. 



R. Speight** has fully described the glaciers of the Upper 

 Rakaia. valley, and has discussed the features of the Rakaia and 

 Lake Heron valleys, the Cass district, and the Upper Hurunui 

 valley, that are due to former more extensive glaciation, including 

 corries and other high-level features due to sapping, discordant 

 junctions, truncated spurs, " glacier potholes" (large round hol- 

 lows believed . to be excavated by ice-eddies), lakes, roches 

 moufonnees, and morainic accumulations. Wave-formed hooked 

 shingle-spits in some of the Canterbury lakes are also described 

 and discussed. Considerable changes in drainage due tO' glaciation 

 are indicated, and post-glacial fans are described. 



* p. G. Morgan, Kiapara District, North Auckland, Tenth Ann. Rep. Geol. Sum. Branch. N.Z. 

 Pari. Paper C. — 2b, pp. 11-13, 1916. 



t Notes of a Visit to Marlborough and North Canterbury . . . ibid. pp. 17-29, 1916. 



t Eruption at Prying Pan Flat, near Wainiangu Geyser, Rotorua District, Eleventh Ann. 

 Rep. Geol. Survey Branch, N.Z. Pari. Paper C. — 2b, pp. 11, 12, 1917. 



§ .T. Park, On the Occurrence of a Striated Erratic Block of Andesite in the Pxangitikei Valley, 

 North Island, New Zealand, Trans. N.Z. Inst., vol. 48, pp. 135-37, 1916. Pleistocene Glaciation 

 of New Zealand, Geological Magazine, decade 6, vol. 5, p. 394, 1918. 



il J. Park, The Rate of Erosion of Hooker and Mueller Glaciers. New Zealand, Trans. N.Z . 

 Inst., vol. 49, pp. 395-96, 1917. 



U J. Park, Oamaru District, N.Z. Geol. Surv. Bull. No. 20 (new series), 1918. 

 ** R. Speight, Physiography (Part I. of R. Speight, L. Cockayne, and R. M. Laing, The Mount 

 Arrowsmith District : .\ Study in Physiography and Plant Ecology, Trans. N.Z. In§t., vol. 43. 

 pp. 315-78, 1911). . . , On a Sliingle-spit in Lake Coleridgej Trans. N.Z. Inst., vol. 45. 

 pp. 331-35, 1913. . . . The Physiography of the Cass District, Trans. N.Z. Inst., 

 vol. 48, pp. 145-53, 1916. . . . Structural and Glacial Features of the Hurunui Valley 

 'Trans. N.Z. Ins'., vol. 50, pp. 93-105, 1918. 



