Gravel Hill mine worked the western end of the Great Perran Iron lode. Which has been worked inland by several mines for traced distance of about 5kms. At Gravel Hill the lode was developed by a beach adit and shafts on the cliff top. The lode was also worked about 155mts inland in an opencast called the Big Iron Pit. The Iron lode is crossed by a N-S lead lode worked a short distance to the north in Wheal Phoenix, and East Wheal Golden. Gravel Hill is know to have been at work befor 1728, also in the 1860's; and from 1874-82. Output figures are only avalible for the last working. When it produced about 8000 tons of iron ore, and 30 tons of zinc ore.
Ref.:
http://www.dcminerals.co.uk/minloc/gravel.htm
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UK OS Grid Reference: SW765575
Map Reference: 50°22'27"N , 5°8'37"W
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