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Flow Phenomena in a Limestone on Changalumi Hill, Southern Nyasaland1

Published online by Cambridge University Press:  01 May 2009

M. S. Garson
M. S. Garson
Affiliation:
Geological Survey Department, P.O. Box 27, Zomba, Nyasaland.
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Abstract

A Basement Complex graphite-limestone on Changalumi Hill, along the eastern escarpment of the Southern Nyasaland rift-valley, exhibits various phenomena including contorted exotic boulders, migration of graphite, and injection of discordant veins into adjacent gneiss. These features indicate that the limestone has burst through its anticlinal roof during strong isoclinal folding at a relatively low temperature, engulfing and distorting a minor synclinal infold. The age of the break-through is proved to be pre-Chilwa Series and pre-Rifting.

Type
Articles
Information
Geological Magazine , Volume 92 , Issue 2 , April 1955 , pp. 155 - 161
Copyright
Copyright © Cambridge University Press 1955

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Footnotes

1

Published by permission of the Director of Geological Survey, Nyasaland.

References

REFERENCES

Bowen, N. L., 1940. Progressive Metamorphism of Siliceous Limestone and Dolomite. Journ. Geol., xlviii, 225–274.CrossRefGoogle Scholar
Cooper, W. G. G., 1955. The Geology and Mineral Resources of Nyasaland. Bull. No. 6 (Revised) Geol. Surv. Nyasaland (in the Press).Google Scholar
Dixey, F., 1927. The Limestone Resources of Nyasaland. Bull. No. 3, Geol. Surv., Nyasaland.Google Scholar
Dixey, F., Smith, W. Campbell, and Bisset, C. B., 1937 (revised 1955). The Chilwa Series of Southern Nyasaland. Bull. No. 5, Geol. Surv., Nyasaland.Google Scholar