The Hangnest Dolerite Sill, S.A
- 1 February 1941
- journal article
- research article
- Published by Cambridge University Press (CUP) in Geological Magazine
- Vol. 78 (6) , 429-450
- https://doi.org/10.1017/s0016756800072162
Abstract
A 500 ft. sill of dolerite from Hangnest in the Calvinia division of the Cape Province (South Africa) exemplifies very clearly two well-marked features of the thicker Karroo sills:—(1) Very slight amount of crystallization-differentiation.(2) Marked tendency to mobilize and react with the associated shales and siltstones.A petrological and chemical study of this sill is given and the mechanism of the various processes discussed.Keywords
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