By Bill Wilks, Principal Geophysicist
![](https://merlinenergy.co.uk/wp-content/uploads/2021/07/BW_Geoliday_Pembrokeshire-1024x811.jpg)
Structural geologists can’t just walk past outcrops like this, even on holiday! A spectacular reverse fault with asymmetric hanging-wall fold in the Lower Cambrian Caerbwdy Sandstone. The exposed hinge zone is gorgeous (at least for this structural nerd!). A relic from the Caledonian-Acadian orogenic phase.