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A Heteromorph of Venanzite

Published online by Cambridge University Press:  01 May 2009

Arthur Holmes
Arthur Holmes
Affiliation:
University of Durham
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Extract

Venanzite. Venanzite is a volcanic rock consisting essentially of y melilite, leucite, olivine, and a little phlogopitic biotite, which occurs as small lava-flows of late- or post-Pliocene age near San Venanzo, Umbria, Italy. This isolated centre of activity lies north-west of Lake Bolsena and is regarded as an outlying part of the Vulsinian district of the Roman netroaranhic nrovince.

Type
Articles
Information
Geological Magazine , Volume 79 , Issue 4 , August 1942 , pp. 225 - 232
Copyright
Copyright © Cambridge University Press 1942

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References

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