SHROPSHIRE ROCKS!

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Caer Caradoc

Caer Caradoc is one of the Stretton Hills.  It helps to make the east slope of the Stretton Valley opposite the Longmynd

It makes a very good view point and to add further interest there is also an Iron Age fort on the top

The rocks around the summit are exposed in crags. These are made of strong igneous rock that resists erosion. Some contain sharp blocks and dust which was thrown into the air as volcanic ash before settling back onto the ground (the rock is called "tuff"). This was likely to have landed on land if there is no obvious bedding, but where there are thin laminations then the ash probably settled through water, sorting the debris as it came to rest.

Yet other igneous rocks were formed by molten rock flowing over the surface, to form lava flows. Can you see the contortions? If so, you are probably looking at rhyolite, a very sticky lava that flowed only slowly and rolled over on itself time and again as it was erupted.

Looking down into the Stretton Valley from Caradoc it is not so hard to believe that you are looking at a tear in the Earth's crust, a fault line that was once as active as the famous San Andreas Fault in California.

 

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