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Published online by Cambridge University Press: 01 May 2009
Leat, P. T.& Thorpe.R. S. 1986.Ordovicianvolcanism in the Welsh Borderland. Geological Magazine 123 (6), 629–40.
The printers apologize for the omission of Figure 7 on page 635; the missing figure is printed below. A self-adhesive label is enclosed in this issue, to be affixed on page 635 where the figure should have appeared.