Folding at Broadhaven
Pembrokeshire, SW Wales
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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.
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Trevayne
Pembrokeshire, SW Wales
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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
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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.
Lat: 48°09'43.5"N
Long: 112°52'11.6"W
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Virtual Outcrop by Adam Cawood
Fractured bedding, Swift Anticline
NW Montana, USA
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Fractured bedding plane within Madison Group Carbonates of Mississippian age. This surface is exposed on the surface of Swift Anticline, an asymmetric fold which is exposed in the frontal part of the Sawtooth Range, NW Montana. The multilayer stratigraphy is heavily fractured across this structure. as can be seen in the detailed virtual outcrop here.