References
- Deer , W. A. and Wager , L. R. 1939 . “ ‘The olivines from the Skaergaard intrusion, Kangerdlugssuaq, E. Greenland.’ ” . In Amer. Min. Vol. 24 , 18 – 25 .
- De Swardt , A. M. J. and Murray , L. M. 1944 . ‘The petrography of the Karroo dolerite sill and dyke at Paardekop, district Volksrust.’ . Annals Univ. Stell. , XXII A, 1–26
- Donnay , J. D. H. 1943 . ‘Plagioclase twinning.’ . Bull. Geol. Soc. Amer. , 54 : 1645 – 52 .
- Du Toit , A. L. 1920 . ‘The Karroo dolerites of South Africa: a study in hypabyssal injection.’ . Trans. Geol. Soc. S. Af. , 23 : 1 – 42 .
- Emmons , R. C. and Gates , R. M. 1943 . ‘Plagioclase twinning.’ . Bull. Geol. Soc. Amer. , 54 : 287 – 304 .
- Johnston , R. 1953 . ‘The olivines of the Garbh Eilean sill, Shiant Isles.’ . Geol. Mag. , XC : 161 – 71 .
- Hess , H. H. 1949 . ‘Chemical composition and optical properties of common clinopyroxenes.’ Pt. I . Amer. Min. , 34 : 621 – 66 .
- Poldervaart , A. 1947 . ‘The relationship of orthopyroxene to pigeonite.’ . Min. Mag. , 28 : 159 – 72 .
- Poldervaart , A. and Hess , H. H. 1951 . ‘Pyroxenes in the crystallisation of basaltic magma.’ . Jour. Geol. , 59 : 472 – 89 .
- Tomkeieff , S. I. 1939 . ‘Zoned olivines and their petrogenetic significance.’ . Min. Mag. , 25 : 229 – 51 .
- Tsuboi , S. 1923 . ‘A dispersion method for determining plagioclases in cleavage flakes.’ . Min. Mag. , XX : 108 – 23 .
- Wagner , P. A. 1914 . The Diamond Fields of Southern Africa. Johannesburg
- Walker , F. 1940 . ‘Differentiation of the Palisade diabase, New Jersey.’ . Bull. Geol. Soc. Amer. , 51 : 1059 – 1106 .
- Walker , F. 1953 . ‘The pegmatitic differentiates of basic sheets.’ . Amer. Journ. Sci. , 251 : 41 – 60 .
- Walker , F. and Poldervaart , A. 1941 . ‘The Hangnest dolerite sill, S.A.’ . Geol. Mag. , LXXVIII : 429 – 50 .
- Walker , F. and Poldervaart , A. 1949 . ‘Karroo dolerites of the Union of South Africa.’ . Bull. Geol. Soc. Amer. , 60 : 591 – 706 .
- Williams , A. F. 1932 . The Genesis of the Diamond. , 2 vols., London
- Williams , G. F. 1904 . The Diamond Mines of South Africa. , 2 vols., New York