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.
East Quantoxhead 10 beds
Somerset, UK
A series of Liassic (top Triassic and Lower Jurassic) limestone bedding planes on the wave-cut platform between East Quantoxhead and Blue Ben, ~ 18.3 km WNW of Bridgwater. The beds are different thicknesses (up to ~ 0.4 m thick), with thicker beds tending to show a lower frequency of joints. The limestone beds are separated by shale beds, which appear to compartmentalise the joints, such that different limestone bedding planes show different patterns of joints.
See Gjøsund, E., 2019. The structural history of a shale. MSc thesis, University of Bergen.
Lat: 51°11'22.7892"N
Long: 3°14'33.987"W
Virtual Outcrop by David Peacock at University of Bergen. Contact David (david.peacock@uib.no) for georectified data, alternate formats or UAV images of outcrop.