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On Rock Glass, and the Solid and Liquid States

Published online by Cambridge University Press:  01 May 2009

Leonard Hawkes
Leonard Hawkes
Affiliation:
Reader in Geology, Bedford College, London University.
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Extract

The solid and liquid states are defined on the basis of the viscosity-temperature curve.

Glasses are amorphous solids. Their state of molecular aggregation is fundamentally different from that of liquids: they are not super-cooled liquids.

It is suggested that porphyritic texture may result from an even rate of magmatic cooling on account of the abnormal increase in viscosity which occurs before vitrifaction.

Type
Original Articles
Information
Geological Magazine , Volume 67 , Issue 1 , January 1930 , pp. 17 - 24
Copyright
Copyright © Cambridge University Press 1930

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References

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