11. Open cast quarrying provides quicker extraction of raw block dimension stone whilst maintaining its integrity.12. A second tin boom came around the 16th century when open cast mining was used. 13. Covering nearly 30 km?it is the second largest open cast mine in the world. 14. The master plan envisaged large mechanized open cast mines. 15. At first, the mines were open cast , because the ore veins were on the surface. 16. There is some open cast workings at Mount View. 17. The plan completely dropped the urgently needed ban on further extension of open cast mining. 18. It is a beautiful village near Pandaveswar surrounded by " Open Cast Coal Mines ". 19. At one time, it was the largest open cast mine in Europe and was 500ft deep. 20. Perryfield Quarry is found towards the middle of the Island and being actively open cast quarried.
