. Transactions of the Royal Society of New Zealand. spond in direction and inclination withthose of the schist. If this should finally prove to be the case,further work will be necessary to decide whether the igneousmass was a laccolite that has since been subject to the same 566 Transactions. folding movements as the surrounding rocks, or whether themass is an intrusion formed subsequent to the main rock-move-ments of the region. The apparent abrupt change on the lastfrom lherzolite to schist, and the gradual change of rock-type tothe west, seem to support the former view. At any rate it isap
. Transactions of the Royal Society of New Zealand. spond in direction and inclination withthose of the schist. If this should finally prove to be the case,further work will be necessary to decide whether the igneousmass was a laccolite that has since been subject to the same 566 Transactions. folding movements as the surrounding rocks, or whether themass is an intrusion formed subsequent to the main rock-move-ments of the region. The apparent abrupt change on the lastfrom lherzolite to schist, and the gradual change of rock-type tothe west, seem to support the former view. At any rate it isapparent that here there is abundant material for studying thedifferentiation of a magma from which rocks varying from dioriteto lherzolite have crystallized. However, the exceeding remote-ness of the locality, the roughness of the country, and the greatdifficulty of obtaining supplies render it unlikely that the dis-trict will be revisited for some time, hence it was consideredadvisable to place on record even these vague and ill-deter-mined o/ Alluvial and moraine. Te Anau bretria. prjj Diorite. o°°?A Gabbro- I o I I °„\ Pyroxenite. 1 rJ* 1 *? >x. i)I>v} Partially serpen tin- tzed lherzolite. Dark serpentinizeddunite. , >? v m Lherzolite. Schist. — «— -« Probable boundary oflherzolite. Dip vertical. Strike N. 10° E The probable transition from the peridotite type to gabbrowas already supposed by Professor Ulrich, from informationsupplied by Butement, who had gathered it from observationsmade nearer the coast-line. Marshall.—Geological Notes. 567 The expedition to this region was made with the object ofmaking observations on the nickel-iron alloy awaruite ; but sofar as that object was concerned it was without result. Noawaruite was found, and no nickel could be found in the rockwhen chemical tests were made. It appears, therefore, thatawaruite does not occur in the peridotite rocks of the south endof this extensive magnesian region. The relati
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