Table IX. Norms, Weight Per Cent. 8871 8873 8932 8776 8768 8791 8800 8859 8829 8819 8817 Q 14.0 11.8 8.0 35.0 33.2 36.7 25.6 33.0 43.5 46.3 53.7 C 1.3 2.2 2.5 3.1 1.7 3.2 0.8 — 1.4 0.7 0.6 Or 16.6 5.5 9.4 16.1 19.3 15.1 26.4 7.9 7.8 38.8 27.2 Ce 0.1 — 0.1 0.8 0.5 — 0.2 0.1 0.1 1.0 0.4 Ab 26.5 45.6 37.2 10.5 14.9 3.6 20.6 46.0 41.4 7.2 10.3 An 17.9 8.6 12.7 15.1 14.8 26.7 14.9 7.1 2.2 1.2 3.2 Wo — — — — — — — 1.0 .— — — Di En — — — — — — — 1.0 — — — Hy En 6.3 6.5 9.7 3.5 2.9 0.7 2.2 0.0 0.1 1.0 1.0 Fs 5.3 5.0 10.5 2.9 3.1 — — — — — — Mt 4.6 4.7 1.8 1.5 1.5 1.3 2.1 0.9 0.6 2.0 1.1 H — — — — — 1.3 1.4 1.3 0.9 0.2 08 Il 2.4 2.9 2.5 0.7 0.7 0.4 0.8 0.5 0.2 0.3 0.2 Ap 0.5 0.5 0.7 0.3 0.2 0.1 — — — — 0.1 Cc 0.2 3.1 1.00 — 0.1 — — — — — — 4.1 3.3 4.2 10.6 7.0 10.9 4.9 1.3 1.3 1.4 1.3 H2O± 99.8 99.7 100.3 100.1 99.9 100.0 99.9 100.1 99.5 100.1 99.9 References Amies, A. C., 1950. An intrusion of porphynite near Waihao Forks, South Canterbmy. Trans. Roy. Soc. N.Z., 78, 271–279. Bailey, E. B., and Grabham, G. W., 1909. Albitization of basic plagioclase felspsus. Geol. Mag., 6, 250–256. Bartrum, J. A., 1929. Igneous rocks at Mount Camel, Hoboura, North Auckland. N.Z. Journ. Sc. Tech., 10, 356–360. Boswell, P. G. H., 1933. On the mineralogy of sedimentary rocks. London, Murby & Co., esp. pp. 87–96. Bradley, W. H., 1928. Zeolite beds in the Green River formation. Science, new sci., 67, 73–74. —— 1929. The occurrence and origin of analcite and meerschaum beds in the Green River formation of Utah, Colorado and Wyoming. U.S. Geol. Surv. Prof. Paper, 158-A, 1–7. Bramlette, M. N. and Bradley, W. H., 1940. Geology and biology of North Atlantic deep-seacores. I. Lithology and geologic interpretations. U.S. Geol. Surv. Prof. Paper, 196-A, 1–34. —— and Posnjak, E., 1933. Zeolitic alteration of pyroclastics. Amer. Min., 18. 167–171. Coombs, D. S., 1950. The geology of the northern Taringatura Hills, Southland. Trans. Roy. Soc. N.Z., 78, 426–448. —— 1952. Cell size, optical properties and chemical composition of laumontite and leonhardite. With a note on regional occurrences in New Zealand. Amer. Min., 37, 812–830. —— 1953. The pumpellyite mineral series. Min. Mag., 30, 113–135 Cox, S. H., 1878. Report on the geology of the Hokanu ranges, Southland. Rept. Geol. Expl. N.Z., 1877–78, 25–48. Crowley, A. J., 1939. Possible criterion for distinguishing marine and non-marine sediments. Bull. Amer. Ass. Pet. Geol., 23, 1716–1720. Daly, R. A., 1910. Average chemical compositions of igneous rock types. Proc. Amer. Acad. Arts Sci., 45, 211–240. Doggett, R. A., 1929. The orthoclase-plagioclase equilibrium diagram. Journ. Geol., 37, 712–716. Dunham, K. C., 1933. Crystal cavities in lavas from the Hawaiian Islands. Amer. Min., 18, 369–385. Engelhardt, W. VON, 1936. Die Geochemie des Barium. Chem. Erde, 10, 187–246.