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7 results found with "Northern Europe"

Fault breccia

Even the hardest rocks can be fractured by movements in the earth’s crust. A rock that has been broken into angular fragments by tearing forces is called fault breccia....

Whetstone

In the 18th and 19th century a specialised tool-making industry grew in East Devon. Using local, very porous and abrasive sandstone, people started making sharpening tools, called whetstones or Devonshire...

Worm tubes

Fossilised worm tubes are found within this sandstone. Whilst the soft body of the worm will not fossilise easily, the mineral tube that it constructs during its life will fossilise...

Wind-polished pebble

Ventifacts or dreikanters are pebbles or cobbles that have been abraded and shaped by wind-driven sand grains. This phenomenon is common in arid areas and deserts where the wind blows...

Luxullianite granite

Luxulliante is a rare type of granite that has been first described from a locality near the village Luxulyan in Cornwall....

Granite

Granite mainly consists of the minerals quartz, feldspar and mica. It is best known in Devon as the rock that forms tors and hill tops on Dartmoor. It was once molten...

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