11. Cummingtonite has also been found in some felsic volcanic rocks such as dacites. 12. In rare cases, felsic rocks become sulfur saturated and form sulfide segregations. 13. Between this street and Highway 11 are Felsic rocks from the Dalhousie group. 14. The felsic shield-building stage ended with the post-explosive phase. 15. Felsic volcanic material was also erupted in the Rast and Mount Hope Troughs.16. Dykes formed later with a mafic dyke injected first followed by a felsic material. 17. Several holocene eruptions have originated from the summit crater and have produced felsic material. 18. The felsic tuffs are normally altered and sheared. 19. Pyroclastic deposits, quartz-phyric and feldspar-felsic rocks are also present. 20. Felsic centres include Chasc�n and Cueros de Purulla.
