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A Formation of Marekanite at El Fiscal, Guatemala

Published online by Cambridge University Press:  01 May 2009

Pontus Ljunggren
Pontus Ljunggren
Affiliation:
Department of Mineralogy and Geology, The University, Lund, Sweden.
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Abstract

An outcrop of obsidian pebbles in a grey volcanic rock was investigated in the field and subsequently examined in the laboratory by means of optical, X-ray, and D.T.A. methods. The results show that the grey rock arose from obsidian through a micro-cracking, causing a formation of marekanite balls (massive obsidian) surrounded by a very brittle grey rock (micro-cracked but completely unaltered volcanic glass).

Type
Articles
Information
Geological Magazine , Volume 97 , Issue 1 , February 1960 , pp. 49 - 52
Copyright
Copyright © Cambridge University Press 1960

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References

REFERENCES

Fenner, C. N., 1936. Bore-hole investigations in Yellowstone Park. Journ. Geol., xliv, 225–315.CrossRefGoogle Scholar
George, O. W., 1924. The relation of the physical properties of natural glasses to their chemical composition. Journ. Geol., xxxii, 353–377.CrossRefGoogle Scholar
Johannsen, A., 1932. A descriptive petrography of the igneous rocks. vol. II Univ. Chicago Press.Google Scholar
Judd, J. W., 1886. On marekanite and its allies. Geol. Mag., iii, 241–248.CrossRefGoogle Scholar
Sapper, K., 1937. Mittelamerika. Handb. Reg. Geol., viii, 4a.Google Scholar