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Rock Crystal and Diamond Pipes in Brazil

Published online by Cambridge University Press:  01 May 2009

Robert R. Walls
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Extract

It is now eight years since the present writer drew attention in these pages to his discovery of a diamond-bearing pipe of igneous origin in Brazil (3). The matter, though hotly contested and denied at the time, seems now to have been generally accepted. So much so in fact that Dr. Alex. du Toit, in his presidential address to the Geological Society of South Africa (10) compares the diamond-bearing pipes of Brazil and South Africa as an indication of the former close connection of these lands.

Type
Original Articles
Information
Geological Magazine , Volume 66 , Issue 3 , March 1929 , pp. 111 - 116
Copyright
Copyright © Cambridge University Press 1929

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References

BIBLIOGRAPHY

(1) 1911. Derby, O. A.. “Speculations regarding the origin of the diamond,” Journal of Geology, vol. xix, No. 7.Google Scholar
(2) 1919. Walls, R. R., “The rock crystal of Brazil,” Trans. Optical Soc., vol. xxi, No. 4.Google Scholar
(3) 1919. Walls, R. R., “The existence of diamond-bearing pipes in Brazil, Geol. Mag., Vol. LVII, No. 676.Google Scholar
(4) 1920. Branner, J. C., “Outlines of the geology of Brazil, with map,” Bull. Geol. Soc. Amer., vol. xxx.Google Scholar
(5) 1921. Draper, D., Trans. Geol. Soc. S.A., vol. xxiii.Google Scholar
(6) 1923. Walls, R. R., “Geology of the high plateau of Brazil,” Geol. Mag., Vol. LX, No. 709.Google Scholar
(7) 1923. Walls, R. R., “The evolution of the high plateau of Brazil,” Scot. Geog. May., vol. xxxix, No. 4.Google Scholar
(8) 1924. Draper, D., Trans. Geol. Soc. S.A., vol. xxvi.Google Scholar
(9) 1924. Walls, R. R., “La produzione dei diamanti al Brasile,” Le vie d' Italia, vol. xxx, No. 12.Google Scholar
(10) 1928. du Toit, A. L., “Some reflections upon a geological comparison of South Africa with South America,” Trans. Geol. Soc. S.A. (Pres. Address).Google Scholar
(11) 1928. Walls, R. R., “Il crystallo di rocca del Brasile,” Le vie d' Italia, vol. xxxiv, No. 3.Google Scholar