8 Transactions. 



IV. Hawke's Bay. 



In 1877 McKay records that Cretaceo-tertiaiy (probably Miocene) rocks 

 unconformably overlie Secondary rocks four miles nortli of Waimirima 

 (Waimarama) and at Paonui Point (4, p. 47). In his sections (opposite 

 p. 50) various apparently unconformable contacts of the two sets of rocks 

 are shown. Some of these, however, are probably merely discordant 

 juxtapositions due to faulting. A few years later McKay states that 

 the Te Ante limestone rests unconformably on the upturned edges of 

 Cretaceo-tertiary strata at Mount Vernon (near Waipukurau) and else- 

 where (7, pp. 71, 72, and sections opposite p. 72). In 1887 he re- 

 describes the so-called Cretaceo-tertiary rocks north of Waimarama as 

 Tertiary beds surrounding an isolated outcrop of Cretaceo-tertiary or 

 young Secondary rocks (13, p. 191), and in a section (p. 192) shows strong 

 unconformity between Upper Miocene and Cretaceo-tertiary strata near 

 the Tukituki Eiver. 



Summary. — -The available evidence leads to the conclusion that the 

 lower part of the Oamaru Series* is probably not developed in the Hawke's 

 Bay district, and that there is a strong unconformity between the Upper 

 Miocene and late Mesozoic rocks. 



V. East Wellington. 



In 1877 Hector found that the Cretaceo-tertiary rocks of eastern Wel- 

 lington were " overlain unconformably by the Hawke's Bay Series, forming 

 the Taipos " (3, p. ix). Next year McKay reported that there was an un- 

 conformity in the Wairarapa district between the Upper Miocene and the 

 Taipo beds, regarded by him as of Lower Miocene age (6, -p. 20). The writer 

 must here remark that, although Miocene fossils have been collected from 

 supposed Taipo beds near Tinui, there can be little doubt but that the true 

 Taipo beds are of pre-Miocene if not pre-Tertiary age. In 1888 Park reported 

 an unconformity at the Blairlogie gas-spring between Miocene and probable 

 Cretaceous rocks (14, p. 21) which, according to the writer's observations 

 in 1910, overlie the Taipo sandstones (43a, p. 2). There may, however, 

 be a fault at this point, so that until further examination has been made 

 the field evidence for physical unconformity remains inconclusive. Park's 

 statement of 1904 (39, p. 412) that in the Mangapakeha Valley there is an 

 unconformity between sandy clays with Tertiary fossils and soft shaly clay- 

 stones with probable Inoceramus presumably has reference to the Blairlogie 

 section. McKay considers that Hutchinson Quarry beds of reputed Eocene 

 {i.e., probably Miocene) age occur near Cape Palliser, and apparently regards 

 them as unconformable to the Cretaceo-tertiarv strata of the neighbourhood 

 (7, pp. 80, 81). 



Summary. — As in Hawke's Bay, the lower part of the Oamaru Series 

 appears to be absent from the East Wellington district. Though every- 

 thing points to strong unconformity between the Upper Miocene, and the 

 late Mesozoic strata, more field-work is required in order to establish it as 

 a fact of observation. 



VI. Marlborough and South-east Nelson. 



Von Haast in 1871 records an unconformity between the "Amuri Bluff 

 beds" and the " Scalaria beds" at Kaikoura and near the Jed River 



* Unless otherwise stated, the Oamaru Series of this paper includes Hotton's Pareora 

 Systoin. 



