AKT[OLE XXIX.-THE GEOLOGY OF CAMPJ3ELL ISLAND AND 



THE SNARES. 



By Professor P. Marshall, M.A., D.Sc, P.Gr.S., School of Mines, Otago University ; assisted by 



Mr. R. Browne, Wanganui. 



CAMPBELL ISLAND. 



The information previously possessed in regard to Campbell Island was mainly 

 derived from the work of Filhol.* Budiananl made some observations on the 

 rocks of the island, and still later HectorJ stated the general results obtained from 

 his visits. Summaries of these have been made use of by Suess§ and Hutton.]] 



The results here set forth were obtained from a five days' visit to the island, 

 and are necessarily somewhat incomplete and disconnected. 



Owing to the tangled nature of the wind-resisting scrub, expeditions were in 

 some measure circumscribed. For almost the whole time the weather was boisterous, 

 and often wet, and snow fell more than once. 



The following are the days' journeys, in the course of which observations were 

 made and material collected : (1.) From the camp near the head of Garden Cove 

 to the western side of Mount Dumas, Monument Harbour, South-east Harbour, 

 the summit of Mount Honey, and Filhol Peaks. (2.) From camp to North-west 

 Bay and the south-west coast. (3.) From camp to Mount Menhir, Mount Paris, 

 the south coast, and Mount Dumas. (4.) From camp to St. Col Peak, North-east 

 Harbour, Lyall Pyramid, and Mount Beeman. (5.) From camp to Terror Point, 

 afterwards to Mount Azimuth. 



This list shows that the east and north coasts were not visited. Inspection 

 from the deck of the " Hinemoa " showed that this portion of the coast-line is 

 formed of nearly horizontal lava-flows separated by scoria-beds. 



GEOLOGY. 



In general outline Campbell Island approaches a circular form more nearly than 

 any other simple figure, though the regularity is much interfered with by the great 

 indentation of North-west Bay. 



A portion of the coast-line nearly three miles in length is fairly straight, and 

 faces north-north-east. The cliffs in this portion of the island appear almost 200 ft. 

 high, and are perfectly abrupt. These features are maintained in the adjacent 



* Filhol, " Mission de I'lle Campbell." 



t Buchanan, J., " Campbell Island and its Flora," Trans. N.Z. Inst., vol. xvi, p. 394. 



i Hector, J., Trans. N.Z. Inst., vol. xxviii, p. 736, 1896. 



§ Suess, E., " The Face of the Earth," vol. ii, p. 146. 



II Hutton, Captain F. W., " Index Faunae Novae Zealandiae," p. 16. 



