. Transactions of the Royal Society of New Zealand. grit, the hard fragments of thelatter causing the striation of the remaining rock, which atthe time of my visit was covered with numbers of well-definedgrooves. Aet. XLI.—On the Neighbourhood of Te Aoroa, Northern Wairoa. By John Harding, of Mount Vernon. [Read before the Hawlccs Bay Philosophical Institute, 13th Aug., 1888.] Te Aoroa is situated on the west bank of the Northern Wai-roa, between Aratapu and Dargaville. This, together with along stretch of country to its north and south, is classed as drift on our geological map. This would ap
. Transactions of the Royal Society of New Zealand. grit, the hard fragments of thelatter causing the striation of the remaining rock, which atthe time of my visit was covered with numbers of well-definedgrooves. Aet. XLI.—On the Neighbourhood of Te Aoroa, Northern Wairoa. By John Harding, of Mount Vernon. [Read before the Hawlccs Bay Philosophical Institute, 13th Aug., 1888.] Te Aoroa is situated on the west bank of the Northern Wai-roa, between Aratapu and Dargaville. This, together with along stretch of country to its north and south, is classed as drift on our geological map. This would apply to the highlands, but about one-fourth is rich alluvial flat and swamp, thehills soft sandstone, varying in colour from snow-white toblack. The coast-hills differ much from those farther inland,the latter having a large quantity of bog-iron mixed with thesurface-soil, in many parts rendering it impervious to water,and so almost useless for agriculture or grazing. All this hill- frattsmjtftms !f«tt |l$a!noh fttsHtote, Vol. XXI. Uj la. JVahiTed £c*iJe. 3-3-. aji<3 ~ sure lines of jSr&jc&jre in. deli /I STR//1TED ffOCK JSoajhnaxLG. Jfee&on. J. Hahding.—On the District of Te Aoroa. 337 land was once grand kauri forest: this is proved by the quan-tity of kauri-gum found on it. It has been worked as a gum-field—sometimes as many as two hundred men digging on itat one time—for the last thirty years (so I have been told byold residents), and yet it still yields a good quantity. The cliffs on the coast show the same drift-sand naturedown to sea-level. They also show that many great changeshave taken place, and that the late kauri forest was not thefirst, for in the cliffs are several beds of good lignite, dividedfrom each other by thick beds of drift-sand. This lignite con-tains many kauri-trees and fossil gum (ambrit). The higher hills all have remains of old pas on the tops,and you can learn the history of them from
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectscience, bookyear1888
