Page:Cornwall; Cambridge county geographies.djvu/182

 f 15' GEOLOGICAL MAP OF CORNWALL O 24 6 a J-O 12 ^ RooAv -^ Blown Sand. Alluvium. 3 Culm Measures. Ei;^ Devonian. ] Loiver Palaeozoic. j | Serpentine. l^g| Basalts. 9 Granite. The- Ccartbridg& University fr&
 * | Pliocene.
 * Pre Cambrian.