418 Transactions. — Geology. 



(m.) Ngapara, North Otago. 



(w.) Waikouaiti, North Otago. 



(o.) Saddle Hill and Green Island, near Dunedin. 



(p.) Kaitangata, South Otago. 



(q.) Forest Hill, Winton, Southland. 



Waipara series — 



(a.) Pakawau, Collingwood. 

 (b.) Mokihinui, West Coast, 

 (c.) Westport, West Coast. 

 (d.) Greyniouth. West Coast. 

 (e.) Malvern Hills, Canterbury, 

 (/.) Shag Point, North Otago. 



[Note. — Since this paper was written the author has 

 •obtained evidence in North Otago and South Canterbury 

 which confirms his conclusion that the Pareora beds underlie 

 the Oamaru stone, and therefore belong to the Oamaru series.] 



Art. XXXII. — On tJie Geology of North Head, Waikouaiti, 

 and its Relation to the Geological History of Dunedin. 



By Professor James Park, F.G.S., Director Otago Uni- 

 versity School of Mines. 



[Read before the Otago Institicte, 13th October, 1903.] 

 Plate XXXII. 



The hill forming Waikouaiti North Head, locally known as 

 Mount Cronin, is terminated on its south side — that is, on 

 the side facing the inlet — by a sharply defined escarpment of 

 great height. At the foot of this escarpment there is an 

 immense talus which descends by a series of steep wave-like 

 undulations towards the sea, and terminates against the shore- 

 line in a sea-wall of irregular height, broken at intervals by 

 breaches over which it is possible to gain the rolling surface of 

 the talus downs above. 



The talus is principally composed of large and small masses 

 of sandstone that have slipped down from the cliffs above. It 

 seems to owe its origin to a series of landslips in places so 

 extensive that masses of rocks many hundreds of scjuare yards 

 in superficial area have settled down in such a manner as to 

 retain their original position relatively to the horizon. 



The fallen masses of sandstone forming the cliffs at the 

 end of the sandy beach are so disposed that the original 

 planes of deposition are nearly horizontal, thereby giving the 

 impression, at first examination, that they are in situ, a decep- 



s 



