208 ^- ^OT^- 



111 tlii.s coiiiiectii^]!, something may conveniently be said on the 

 mode of foi"mation of those gneisses and schists that come below the 

 Gozaislio complex', and which are now included ])y me in the Takarniki 

 scries and the Lavrentinn. 



There are in tliis region nnmberless modifications of granites, 

 syenites as well as gabbros, that are more or less schistose. This once 

 seemed to me an in\'in('ii:)Ie circnmstantial e\idence of the crushed-rock 

 origin of schists arid gîieisses, and apparent]}' harmonized well witli all 

 the facts, then o])served in the field. lUit being nnwilling to C(^me to 

 a, hasty conclusion. I yisited the plateau again during tlie last Jvaster- 

 holidays, and tliis time I fonnd some of my former conclusions to be 

 illusory. There are of cou.rse schistose fjranites, spoken of usual I v, 

 tliough very impi'operly, as granite-gneiss or gneiss-granite, which are 

 reall\- coniiected witli tlie massise granite i)f irruptive origin, and tliese 

 T consider to be of the age of Laurentian. There are again, foriiiiutj 

 (iHdilier ffroup, ejneisses oiid viira-scliists, a.t one time included by me 

 witliout distincti(^ii in the same class as the Laiu'entian gneisses. They 

 are intercalated Ijetween bands of a coarse crystalline limestone, near 

 Takanuki, for example. 



ONci'whelmed by tlic arra,v of facts continually presented to 

 my eyes (bu'ing field-work, I ])aid little lieed to the interbanded 

 limestones, wliich besides giye little hopi' of atfonbng fbssili/.rd 

 remains. Xow, Reyer says, in his TiiC'iretischeii Geolofile, that 

 carl)onate rocks may reasonably occur inserted I)etween granites 

 tln'ough interrupted up-welling of a plastic magma by subse- 

 (|ue,nt pushes (^Nachschuh). Examining closely the mode of occur- 

 rence of these rocks, [ found the schistose granite to be 

 really granite (Laurentian) with that special structure, due surely to 

 the effect of pressure ; while the limestone-bearing gneiss, and the 

 mica-schist (Takanuki series), both having a distinct parallel arrange- 



