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Microscopic Colloform Structures in “Mud Balls” at Waiotapu, New Zealand

Published online by Cambridge University Press:  01 May 2009

J. A. Bartrum
J. A. Bartrum
Affiliation:
Auckland University College
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Extract

A Recent paper in this journal by K. P. Oakley (1940) has drawn attention to certain structures in Recent rhyolitic ashes of Malaya, and contraverts the earlier view that these structures represent sponge spicules. Oakley suggests tentatively that most of them are the casts of minute spherical and tubular hollows in the material of the ashes. It may be of interest, therefore, to describe comparable material from New Zealand which appears to support this suggestion.

Type
Articles
Information
Geological Magazine , Volume 78 , Issue 3 , June 1941 , pp. 232 - 235
Copyright
Copyright © Cambridge University Press 1941

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References

REFERENCES

Berry, J. A., 1928. The Volcanic Deposits of Scinde Island. With Special Reference to the Pumice Bodies called Chalazoisites. Trans. N. Z. Inst., 59, 571–608.Google Scholar
Grange, L. I., 1937. The Geology of the Rotorua-Taupo Subdivision. N. Z. Geol. Sum., Bull. No. 37 (n.s.).Google Scholar
Oakley, K. P., 1940. The Organic Content of Recent Rhyolitic Ashes in Malaya. Geol. Mag., lxxvii, 289–294.CrossRefGoogle Scholar
Rogers, A. F., 1917. A Review of the Amorphous Minerals. Journ. Geol., xxv, 515–541.CrossRefGoogle Scholar