VESICULAR LAVA - Devon
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VESICULAR LAVA
350 million years old (Lower Carboniferous)
Scanniclift Copse, Doddiscombsleigh, Devon
When lava erupts at the surface it is often full of gas bubbles which formed as the pressure was released on eruption. When the lava hardens into rock the bubbles are left as cavities which are known as vesicles. A volcanic rock with gas bubble cavities is known as vesicular.
This is a rare example from Devon.
Click on a picture for a larger image
Size: approx. 7 x 6 x 4.5 centimetres
Weight: 170 grams
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