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VII.—A Contribution to the Petrology of North-Western Angola

Published online by Cambridge University Press:  01 May 2009

Arthur Holmes
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Extract

The rocks described below were collected by Colonel Andrade, in 1904, on the road which begins at Senza do Itombe on the Loanda-Malanji Railway, and runs in a north-easterly direction to Bango.

Type
Original Articles
Information
Geological Magazine , Volume 2 , Issue 7 , July 1915 , pp. 322 - 328
Copyright
Copyright © Cambridge University Press 1915

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References

page 322 note 1 In the Explanation of Plate XI, p. 272, the following corrections should be made: Fig. 3, for “wisp-like ferns” read “wisp-like forms”; Fig. 4, for “Phenolite” read “Phonolite”; for “magnification 40 in each case” read “magnification as indicated in each case”.

page 323 note 1 Plate XI, Fig. 2.

page 323 note 2 Adams, & Barlow, , The Haliburton and Bancroft Areas (Geol. Surv. Canada), 1910, p. 247.Google ScholarQuensel, , Bull. Geol. Inst. Upsala, xii, p. 145, 1914.Google Scholar

page 324 note 1 Gregory, J. W., Q.J.G.S., lvi, 1900, p. 223.CrossRefGoogle Scholar

page 324 note 2 Brögger, , Zeit. Krist., xvi, p. 30, 1890.Google Scholar

page 324 note 3 Pl. XI, Fig. 3.

page 325 note 1 Brögger, , Zeit. Kryst., xvi, p. 412, 1890.Google Scholar

page 325 note 2 Scott, , Min. Mag., xvii, p. 139, 1914.Google Scholar

page 326 note 1 Geol. Mag., 1913, p. 508; 1914, p. 485.Google Scholar See also Scott, , Geol. Mag., 1914, p. 319; 1915, p. 160.CrossRefGoogle Scholar

page 326 note 2 The American Quantitative Classification fails to observe this principle, and the result is somewhat unfortunate, particularly in Order 5 (Q/F or L/F < 1/7) which includes rocks that may contain felspars, or felspars with quartz, or felspars with felspathoids.

page 326 note 3 “Ueber Monchiquit, etc.”: Tscherm, . Min. Pet. Mit., xi, p. 445, 1890Google Scholar. See also Evans, Q.J.G.S., lvii, p. 38, 1901. Rosenbusch did not consider olivine to be an essential constituent (Elemente der Gesteinslehre, 1898, p. 233).

page 326 note 4 Williams, , Arkansas Geol. Surv. Ann. Rep., vol. ii, p. 107, 1890.Google Scholar