Rock fences are interesting to take a look at. They usually reflect local geology remarkably well because it is expensive to transport such a heavy material which is readily available in most places. Here I present a collection of images of rock fences and walls I have taken so far.
Unfortunately my collection is very small but this post in its current state is just a start. I plan to update it as I take new photos. Now I have a reason to hunt these walls and a place where to upload the photos.
Ignimbrite (welded tuff). Gran Canaria, Canary Islands, Spain.
Mudstone (turbidite). Cliffs of Moher, Ireland.
Andesite or basaltic andesite. Red blocks are weathered. Santorini, Greece.
Quartzite. Connemara, Ireland.
Basalt or basanite. La Palma, Canary Islands, Spain.
tuff (ignimbrite). Gran Canaria, Canary Islands, Spain.
Quartzite. Santorini, Greece.
Ignimbrite. Tenerife, Canary Islands, Spain.
These rocks may look like man-made bricks but they have entirely natural composition. This is the same Tenerife ignimbrite shown in the previous picture.
Pumiceous lapillistone (pumice fall deposit known as Granadilla pumice), Tenerife, Canary Islands, Spain.
Wall made of gneiss in Sweden.