• Twitter
Contact

Lat: 51°40'53.0"N

Long: 5°10'32.1"W

​

Virtual Outcrop by Adam Cawood

St Ann's Head

Pembrokeshire, SW Wales

​

​

Folded Devonian Sandstones deformed during the Variscan Orogeny. The folds here show a prominent axial planar cleavage which varies in intensity across the sandstone layers. Several conjugate shear planes are also present within the folds - these likely formed to accommodate contraction after folding initiated  

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. 

  • Home

  • Map

  • Outcrops

  • Virtual field trips

  • Contribute

  • About

  • More...