Folding at Broadhaven
Pembrokeshire, SW Wales
One of The Geological Society's 100 Great Geosites. Asymmetric folds in interbedded Carboniferous siltstones, shales and coal horizons are cut here by a number of northward-propagating thrusts. This classic structure has been studied in some detail (e.g. Williams and Chapman,1983) as it provides an excellent outcrop example to examine the interplay between faulting and folding during deformation.
Trevayne
Pembrokeshire, SW Wales
Large-scale harmonic fold within Carboniferous siltstones, shales and coal horizons. Close inspection of the fold core reveals several low offset thrust segments which probably formed to accommodate the relatively tight interlimb angle here. The cross-section below shows the transition in structural style between this location, Monkstone Point and Saundersfoot.
Trevayne
Pembrokeshire, SW Wales
Large-scale harmonic fold within Carboniferous siltstones, shales and coal horizons. Close inspection of the fold core reveals several low offset thrust segments which probably formed to accommodate the relatively tight interlimb angle here. The cross-section below shows the transition in structural style between this location, Monkstone Point and Saundersfoot.
Hartland Quay
Devon, UK
Classic location of upright chevron folds exposed in sea cliffs (up to ~ 80 m high) and wave-cut platform, north and north-east of the Hartland Quay Hotel. The folds are in sandstones, shales and siltstones of the Carboniferous, Holsworthy Group. The folds have wavelengths of ~ 50 m, with extensive quartz veining in the limbs and some saddle reefs in the hinges. The section has been well studied, see also models of Bude for similar structures.
Davison, I., Jeffcoate, A., Oing, H., 2004. Geometry of chevron folding shortening and estimates at Hartland Quay, North Cornwall, UK, and some regional implications for Culm Basin development. Geoscience in south-west England 11, pp. 42-50.
Lat: 50°59'48.7529" N
Long: 4°31'52.7586" W
Virutal Outcrop by David Peacock