Lomography

Tin Mine Window by Jonathan Polkest

An important feature of the geology of Cornwall is the presence of five large bodies or "plutons" of granite together with a number of smaller outcrops From west to east the larger granites are those of the Isles of Scilly, Lands End, CarnMenellis, St Austell - Hensbarrow and Bodmin Moor, The smaller bodies include Godolpin/Tregonning, St Michaels Mount, Carn Marth, Carn Brea, St.Agnes, Cligga Head, Castle an Dinas, Belowda, Kit Hill, Hingston Down and Gunnislake, These granites rise from a large parent body the Cornubian Batholith which extends from the Isles of Scilly to Dartmoor much of the batholith is concealrd beneath the Devonian and Carboniferous strata. Tin Mining has existed for many years possibly before the more form alised records can account for, during the 1850's the engine houses proliferated all over the Great Flat Lode near my home in Tregonning /Relubbus area and this window made of brick is a small feature of just such a tin mine at Wheal Martin.