. The geology of the Oamaru district, North Otago (Eastern Otago division). al volcanic material (Fig. 17) containingman)^ of the minerals found in the Kakanui tuffs. These tuffs were probably emittedby an independent submarine volcano that became active about the same time as theKakanui volcano. The material ejected by the Papakaio volcano, as exposed in BigFlume Creek, contains no trace of organic remains. The Kakanui volcanic breccia is strongly develo])ed at Kakanui South Head(Fig. 19), Kakanui North Head, and on the coast from a mile to two miles northof Kakanui. Thomson* estimates the mi
. The geology of the Oamaru district, North Otago (Eastern Otago division). al volcanic material (Fig. 17) containingman)^ of the minerals found in the Kakanui tuffs. These tuffs were probably emittedby an independent submarine volcano that became active about the same time as theKakanui volcano. The material ejected by the Papakaio volcano, as exposed in BigFlume Creek, contains no trace of organic remains. The Kakanui volcanic breccia is strongly develo])ed at Kakanui South Head(Fig. 19), Kakanui North Head, and on the coast from a mile to two miles northof Kakanui. Thomson* estimates the minimum thickness at the North Head at 130 the coast north of Kakanui the thickness is not less than 150 ft., and may be muchgreater. At the North and South Heads the breccia consists of rudely bedded coarseangular tachyUtic material, set in a matrix of volcanic ash cemented by carbonate of * J. A. Thomson : • The (lem Gravels of Kakanui; with Remarks on the Geology of the Inst., vol. xxxviii, 1906, pp. 482—495 ; 4 figs. SuUeUn Ni . Reference to Geological Colours &c. GEOLOGICAT. MAP OF KAKANUI AND VICINITYShowing Subdivisions of Oamaruian Qrovels. sands ano stfts High fevef grfwels. nutinly (^ Blue rnnrirnj days mth PachyinagB& Oeborah (Kakanui) Limestone Deborah Tuffs Oamarti Stonp _ Waiareka Tu/7i Basaltic dykes and sills Scale of Chains 20 30 40 so 60 ? ^ Outcrupa mth observed strike ^nddip -i^^-fossils. X Geoliigy by Jiixrw^ Paurk. ^aiareka Creek
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectgeology, bookyear1918
