Transactions of the Royal Society of New Zealand . ippedover the fault-scarp by the Kaiwarra andthe Ngahauranga have not been revealedeven by the uplift of 5 ft. which tookplace in 1855 (see p. 259). Fig. 5, whichis a rough contour-map of the harbour-floor, gives an idea of the manner inwhich sediment is being evenly spreadout as a flat layer in the deep waterof the harbour. It will be noted that theshallowest water is near the entrance, where a dredge is at work liftingsand and shells. The shallow water at the entrance appears to be dueto the accumulation of waste broken by wave-action on the
Transactions of the Royal Society of New Zealand . ippedover the fault-scarp by the Kaiwarra andthe Ngahauranga have not been revealedeven by the uplift of 5 ft. which tookplace in 1855 (see p. 259). Fig. 5, whichis a rough contour-map of the harbour-floor, gives an idea of the manner inwhich sediment is being evenly spreadout as a flat layer in the deep waterof the harbour. It will be noted that theshallowest water is near the entrance, where a dredge is at work liftingsand and shells. The shallow water at the entrance appears to be dueto the accumulation of waste broken by wave-action on the outer coast. The material furnished by marine erosion on the outer coast hascompletely blocked one former entrance to the harbour. A bar of sand,or tombolo,* has converted a former island into a peninsula (MiramarPeninsula), and divided a former channel into two bays (Lyall Bay andEvans Bay). A good example is here afforded of the manner in whicha coast-line is straightened (regularized) by wave-action, as described byDavisf and by de Fig. ?Port Nicholson. Depths in fathoms below from the New ZealandNautical Almanac, 1910. * See F. P. Gulliver. Shore-line Topography, Proc. Am. Ac. of Arts and Sci.,vol. 34, No. 8, 1899, p. 189. t The Outline of Cape Cod, Proc. Am. Ac. of Arts and Sci., 1896 ; reprinted inGeogr. Essays, 1909, p. 690. X Geographie physique, p. 685; Paris, 1909. Cotton.—Notes on Wellington Physiography. 253 The diagram (fig. 6) is an attempt to explain graphically the evolutionof Miramar Peninsula. It does not appear that the channel thus blockedhad ever the importance of the present entrance, which has from thefirst been the main channel, and is the continuation of the Hutt Valley. Mr. Elsdon Best has drawn the writers attention to an authentic Maoritradition, first put in writing about 1850, which relates some episodes in thehistory of the locality some seventeen generations ago ( about the end ofthe fifteenth century). It appears th
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