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Magnetic survey of a monchiquite intrusion in central Gwent

Published online by Cambridge University Press:  01 May 2009

Simon K. Haslett
Simon K. Haslett
Affiliation:
New Inn Cottage, Llangeview, Usk, Gwent, NP5 1EY, United Kingdom
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Abstract

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A magnetic survey was carried out along a NW–SE trending monchiquiteintrusion near Llanllowell, Gwent. The intrusion was previously thought to be a dyke, 23m long and 5 m wide, and that it may have been an extension of a second monchiquite intrusion at Great House to the southeast. However, the survey revealed the intrusion to beat least 34 m long, up to 20 m wide, and independent of the Great House intrusion. Evidence suggests that both of these monchiquite intrusions in central Gwent may have been feeder pipes to post-Lower Carboniferous volcanoes.

Type
Correspondence and Notes
Information
Geological Magazine , Volume 127 , Issue 6 , November 1990 , pp. 591 - 592
Copyright
Copyright © Cambridge University Press 1990

References

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