Roche, Roche Rock - St Michael's Chapel, Cornwall - August 27, 1984
Roche Rock (Cornish: An Garrek) stands out as a rocky outcrop some 20 metres (66 ft) high on the northern flank of the St Austell granite with an approximate area of 600 metres (2,000 ft) x 300 metres (980 ft). The rock is of interest to geologists as it is a fine example of quartz shorl; a fully tourmalinised granite, with black tourmaline crystals. The Rock itself lies approximately 500 metres (1,600 ft) north of the northern margin of the St Austell granite, which is the smallest of the five main apophyses of the Hercynian batholith of Southwest England.
On top of Roche Rock is a ruined chapel (dedicated to St Michael). Roche Rock has many folk-lore tales associated with it, the two most famous being the legend of Jan Tregeagle, a seventeenth century magistrate, who after death found refuge in the chapel and the other being part of the Tristan and Iseult tale.
The chapel was one of a number of locations in Cornwall used for filming the motion picture Omen III which starred Sam Neil.