Transactions of the Royal Society of New Zealand . ut 840 sea-level. The deepening of the captured stream at the elbow ofcapture is 400 ft. or 500 ft. Northward from this divide the Kaiwarra,which here occupies the Long Valley, descends somewhat rapidly in a trenchincised in an older mature valley-floor. At the upper reservoir ( infig. 2) it follows entrenched meanders of small radius, and a portion of the oldflood-plain on which the meanders originated remains as a bench far abovethe present stream and at a height of 660 ft. above the sea. At this point amature dry valley on a le
Transactions of the Royal Society of New Zealand . ut 840 sea-level. The deepening of the captured stream at the elbow ofcapture is 400 ft. or 500 ft. Northward from this divide the Kaiwarra,which here occupies the Long Valley, descends somewhat rapidly in a trenchincised in an older mature valley-floor. At the upper reservoir ( infig. 2) it follows entrenched meanders of small radius, and a portion of the oldflood-plain on which the meanders originated remains as a bench far abovethe present stream and at a height of 660 ft. above the sea. At this point amature dry valley on a level with the old flood-plain bench, evidently theold stream-course, swings off to the north, while the course of the Kaiwarra,flowing north-east, is a young gorge. The sketch, fig. 12, shows the oldvalley and the young gorge of the Kaiwarra. Following the old dry valley mentioned above, we find ourselves in thebroad mature valley occupied by the settlement of Karori. It has beeninvaded by the head of the Karori Stream from the south-west, as well. Fig. 12.—Capture of the Long Valley Stream by the Kaiwarra. Upper reservoir on the left; young gorge of the Kaiwarra below the upper-reservoir dam on the right. as by the Kaiwarra from the north-east. The north-eastward continuationof the now broad and mature Long Valley through Ngaio and Khandallahis evident, but between Karori and Ngaio the floor of it has been almostcompletely gouged out by the numerous young deep-gorged tributariesof the middle Kaiwarra. Overlooking the Kaiwarra there are, however,abundant stream-deposits in Karori, and a bed of gravel on the westernslope of the Tinakori hills at a height of 600 ft. The lower Kaiwarra leaves the Long Valley by a steep-walled gorge, andcrosses the scarp of the Wellington fault. The north-eastward continua-tion of the valley is occupied next by a short obsequent stream, a tributaryof the Kaiwarra. Farther on, at Khandallah, it is crossed by a streamwhich joins the Ngahauranga near
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectscience, bookyear1911
