Geological Sites and Sights in the Mole Valley
Denbies Wine Estate
Field Excursion to the Lizard Peninsula: A Journey to the Centre of the Earth
The objective of the trip was to examine exhumed mantle and oceanic crust and the overlying deepwater facies of Devonian age (c.400 Ma) exposed around the Lizard Peninsula.
Overlying deepwater facies: Pendower Formation mudstones overlain by Pleistocene raised beach, Pendower Beach.
Mantle to crust transition at Coverack Cove. Mantle peridotites (left foreground), and crustal gabbros (far right distance). Troctolites (centre, and under the bay) mark the position of the Mohorovicic Discontinuity.
Detail of gabbro: dark grey plagioclase (altered to white prehnite), green augite, green olivine, black ilmenite.
Hornblende schists (amphibolites) at Cadgwith Cove. A shear zone runs through the centre of the outcrop.
An Excursion to the Dorking Caves
Field Excursion to Philpott's Quarry, West Hoathly, Sussex
Briefing for the group at the start of the trip. The quarry has exposures of the Lower Cretaceous Tunbridge Wells Sandstone below an overburden of Grinstead Clay.
Sedimentary features in the Tunbridge Wells Sandstone: cross-bedding, younging to the left, with iron liesegang.
Some Other Member Activities
Visit to Ibstock Quarry and Brickworks, Beare Green. The bricks are made from the Lower Cretaceous Weald Clay.