Subject ASC0003ur1
The geologist : a popular monthly magazine of geology.
Vol.2 (1859), Page 24 (1859)
Natural History Museum Library, London
BHL Page 46197708
Keywords
Dyke Porphyritic Geological map porphyritic dyke elvan-course watermill bay st.mary's scilly ridge granite Porphyritic dyke Elvan-course Watermill Bay St Mary's Scilly geology