The geology of the Coromandel subdivision, Hauraki, Auckland . INOCEBAMUS HAAST1 (HoCHSTETTEll), FROM CONGLOMERATE, M\N\|\ SERIES, MANAIA , :( diameters. Work of Mr. Alexandei McKay, Id M MS Belemnites Si. (Transverse Section), prom Conglomerate, Manaia Hill Series, Hill. Oeol. Bull. No. .,. [To face p. J,8. mmmmmmfmx 49 of this igneous material consists of fine detritus, with occasionally rounded pebbles exceeding an inchin diameter derived from diorites and porphyrites, but more remarkable is the very large part whichflow andesites and flow rhyolites have
The geology of the Coromandel subdivision, Hauraki, Auckland . INOCEBAMUS HAAST1 (HoCHSTETTEll), FROM CONGLOMERATE, M\N\|\ SERIES, MANAIA , :( diameters. Work of Mr. Alexandei McKay, Id M MS Belemnites Si. (Transverse Section), prom Conglomerate, Manaia Hill Series, Hill. Oeol. Bull. No. .,. [To face p. J,8. mmmmmmfmx 49 of this igneous material consists of fine detritus, with occasionally rounded pebbles exceeding an inchin diameter derived from diorites and porphyrites, but more remarkable is the very large part whichflow andesites and flow rhyolites have taken in the formation of all these grits and conglomerates. Itis difficult to speculate as to the source of this great amount of volcanic material, but the following-facts appear to bear on the question. The Tokatea Hill Series has been shown to contain interstratifiedrhyolites, and is largely intruded by numerous dykes of porphyrite and diorite. In this connection itis significant to note that intrusions occur much less frequently in the Manaia Hill Series than in theTokatea Hill and Moehau Series ; moreover, those that do occur are less crystalline than mosl of thosein the older rocks, and are probably o
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Keywords: ., bookcentury1900, bookdecade1900, bookidgeolog, booksubjectgeology
