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.
Kilve Faults
Somerset, UK
Sea cliff (up to ~ 12 m high) of Liassic (top Triassic and Lower Jurassic) limestones and shales, east of Kilve, ~ 16.8 km WNW of Bridgwater. Normal faults strike ~ E-W to ~ WNW-ESE. Most have down to the north displacements of up to tens of metres. Beds are folded to accommodate fault displacements, especially at relay ramps between stepping fault segments.
See Steen, Ø., Sverdrup, E., Hanssen, T.H. 1998. Predicting the distribution of small faults in a hydrocarbon reservoir by combining outcrop, seismic and well data. In: Jones, G., Fisher, Q.J., Knipe, R.J. (eds) Faulting, Fault Sealing and Fluid Flow in Hydrocarbon Reservoirs. Geological Society, London, Special Publications, 147, 27-50.
Lat: 51°11'38.7943"N
Long: 3°13'12.2351"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.