In this class are included most of the lodes in the tin parishes of St. They are composed of alternate beds of garnet en masse , and hornblende-slate a variety of our iron- stone , the former being partly granular, and partly compact, containing here and there a few spots and joints of large grained cockle shorl. Search the history of over billion web pages on the Internet. About half a mile eastward of Trewavas Head, in the parish of Breage. How far this has been the case at Trewidden Bal, in the parish of Madron, will appear firom a consideration of the following particulars. These may he seen in almost all the serpentine formation of the Lizard : some of them are as wide as half an inch ; but their width, in general, is that of a line, running in all directions.