Transactions of the Royal Society of New Zealand . ing valleys, the terminaldownward curving of their floors would have been absent, and the tribu-tary glaciers would have joined the main one at grade. This they mayhave done during the maximum phase of glaciation, the icefalls and thewearing of the lips of the glacial hanging valleys by them being referableto a later date. Glacial (U-shaped) hanging valleys occur at the heads of some of theother glaciated valleys also. There is a tiny one at the head of the valleyof Bennington Creek. The cleft cut in its lip is in its incipient stages, sothat
Transactions of the Royal Society of New Zealand . ing valleys, the terminaldownward curving of their floors would have been absent, and the tribu-tary glaciers would have joined the main one at grade. This they mayhave done during the maximum phase of glaciation, the icefalls and thewearing of the lips of the glacial hanging valleys by them being referableto a later date. Glacial (U-shaped) hanging valleys occur at the heads of some of theother glaciated valleys also. There is a tiny one at the head of the valleyof Bennington Creek. The cleft cut in its lip is in its incipient stages, sothat small waterfalls still descend into the main valley. The precipicesof the Mitre Peak surmount the north-east side of this hanging valley,and its head lies in the side of the main watershed of the Mitre-HoldsworthRange. Another small glacial hanging valley is situated at the head of theglaciated portion of the Mangaterera Valley. Its lip also has been cut bythe small stream which now drains it. Adkin.—Former Glaciation in the Tararua Eanges. 311. ziitUJJUUU ??»?; —— 312 Transactions. (5.) Fluviatile Hanging Valleys. Hanging valleys having the typical V-shaped cross-section of streamerosion, and which owe their present state as such to the former presenceof a glacier, are found in Park Valley only. The best examples are situatedon the left wall of the valley, about three-quarters of a mile below themain cirque. The height of the falls which descend from their lowerends into the main valley is now greatly reduced by the infilling of thelatter with scree-material. In the glaciated part of Park Valley the fluvia-tile hanging valleys are the sole remaining relics of its pre-glacial form—a form due entirely to fluviatile erosion. Prior to the glacial period theportion of Park Valley referred to was very much narrower, and also ratherless deeply excavated than it is at the present time. From the ridgesforming the watersheds on either side of the valley steep lateral spurs rand
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectscience, bookyear1911
