Qua.ri. Jo"urn.Geol . Soc; .Vol .LVIl. PI. I 











V30 





^^<^ 





■^..h"^'/^-^ 



t^ 







5 







XI40 



Prajik. Rotley del. M.P.fk.rlier TitK. 



XI40 



MinteraBros .imp. 



TUFACEOUS RHYOLITES FROM DUFTON PJKE. WESTNfORLAND. 



