Adkin. — Porirua Harbour. 



149 



movement responsible for its present position above high-tide level was 

 undoubtedly the uplift that affected the eastern shore of Cook Strait during 

 the 1855 earthquake, as shown by several lines of evidence: (1.) The 

 similarity of the raised shore-platform and the raised beach-ridges of 

 the Porirua area to the raised shore-platform fringing the shores of Mira- 

 mar Peninsula at Port Nicholson, and to the 9 ft. beach (Crawford, 1869 : 

 pp. 320-21 ; Aston, 1912, p. 209 ; and writer's observations) of Turakirae Head, 

 respectively ; in the latter localities these features have always been attri- 

 buted to the uplift of 1855. (2.) The historical proof of the shallowing 



a 



'Raised skore -ptat^oov. 



OXd Ria^e-remnavu Raised 

 Sea of Trias - Ju-r-a beach- 



CUjf Strata. * ridge 



Blown. Savict 



"Wcslo-n. flank, of 

 hill - ruXqe before 

 Cilff -culling 



\ 



Fov-vier principal ouflel 

 Of Taupo Ci'icK, 

 now closed 



^— *^~~/ Mi r'.^ -- " ~ ~ <=r ^—^TTT i 



^':':-:- : i':\ ' Datum Ur.e ! '■ f \^^S§g&V&\ 



Hiqfe Tide level 



Sanely hc<xc\ 

 $$ foreshore. 



Uixncs oj blown Sand 



Old 

 Sea. 

 CUff 



Raised bcach-ndgj Probable raised shore -platform' 3 ?-' 



— Sca-lcs 



fior L-Z.O u"[ot 



22 4* C-S 88 HO fil YarJ. 



Vertical 



O 2o 40 £>0 &O ioo J?.o Z40 Teet 



' i — i — i i _i ^- _ r I 



Fig. 2. — Sections of the Porirua coast : (a) at Taupo Point, showing the raised shore- 

 platform and inland cliffs ; (b) half a mile south of Taupo Bay, showing 

 the raised beach-ridge, inland cliffs, and dunes of blown sand. Scale, 

 vertical to horizontal, 3 : 1. 



of the Pahautanui Stream as cited by Bell (loc. cit., p. 538). 1 have also 



received details of a statement made by Mr. James Jones, an old Pahautanui 



settler, to the effect that after the earthquake the tidal flats at Pahautanui 



were permanently raised above high tide, and were for a, time 



account of putrefying shell-fish and other marine matter.* 



persistence of a considerable proportion of what is practically 



surface of the raised shore-platform, in spite of the effects of powerful 



noisome on 

 (3.) The 

 the original 



* Mr. Jones stated that an area of at least 100 acres was raised above sea-level, 

 and his estimate of the amount of uplift was 3 ft. This agrees with my own estimate 

 based on observations of the raised shore- platform. Mr. Jones also referred to the 

 shallowing of the Pahautanui Stream, thus confirming in all details the historical 

 evidence cited by Dr. Bell. 



