Fault Propagation Cave, Constitution Hill, Aberystwyth, Ceredigion, Wales, UK
Posted by: 
Ddraig Ddu
N 52° 25.431 W 004° 05.136
30U E 426180 N 5808736
A fault propagation cave that has cut a cave through the cliff face forming a tunnel that you can climb through.
Waymark Code: WMBV6K
Location: South Wales, United Kingdom
Date Posted: 06/22/2011
Views: 8
A fault propagation cave that has cut a cave through the cliff face forming a tunnel that you can climb through.
The SSSI; Craig Lais has near the base of constitution hill a hole worn through by weathering into the cliff face that itself is formed as a Fault Propagation Fold.
Looking at the cliff face when approaching this Earthcache from the bottom of Consitution Hill you will see a downfold or 'syncline' and an upfold or 'anticline' that is part of a Fault Propagation Fold.
Now making sure the tide isn't in or coming in make your way north along the side of the beach and over the waterbreak (rusty ladder) and carefully over the rocks to GZ.
The cliffs and foreshore also exhibit unusual folds that deform the sequence of turbidites; these are the layers you can see built up over million years when the area was underwater and layers of sediment built this rock while under pressure. These folds formet prior to the Caledonian phase of mountain building, approximately 400 millions years ago, and as such are an important locality for future research. The section of the coast is frequently visited by national and international specialists and is considered to be of exceptional conservation value.
The best understood geometry occurs where a fault tip lies in a ramp. Strata (rock) cut by the base of the ramp are shortened by thrusting (movement of the layers). Layered rocks above the tip of the fault are shortened by this folding. In-between layers of rock are shortened by a combination of the folding and faulting. Fault tips must occur through layers of rocks because the forces on the rock twist and turn the layer causing faults to develop. Hence this type of fold is called a fault propagation fold.
Type of Land: Other
Managed By: SSSC - CCW
Contact Info: Open Access to walkers - careful of tides
Type of Cave: Sea Cave
Contains Stalactites: no
Contains Stalagmites: no
Contains Bats: no
Price of Admission: 0.00 (listed in local currency)
Website: Not listed
|
Visit Instructions:
Please include a digital photograph of the cave which documents your visit and any information that may be helpful for future visitors.
Recent Visits/Logs:
| There are no logs for this waymark yet. |
|
|
|