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RECOMMENDED ONLINE RESOURCES

  

How to recognise fake fossils:

http://www.fossilmuseum.net/

collect/fossilfakes.htm​​​​​​​

  

If you've found a meteorite:

https://sites.wustl.edu/

meteoritesite/items/what_to_do/

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If you live in London:

​​​​​​​​​​​​http://londonpavement

geology.co.uk​​​​​​​
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For beautiful decorative stones:

​​​​​​​http://www.oum.ox.ac.uk/corsi/​​​​​​​

  

For the geology of where you are:

https://www.bgs.ac.uk/discovering

Geology/geologyOfBritain/viewer.html​​​​​​​
​​​​​​​​​​​​​​​​​​​  
​​​​​​​​​​​​​​​​​​​​​
The Jurassic Coast fossil finder:

https://jurassiccoast.org/what-is-the-

jurassic-coast/all-about-fossils/fossil-

finder/fossil-finder-database/

  

The rocks and minerals of Minecraft​​​​​​​​​​​​​​

https://www.mindat.org/a/minecraft​​​​​​​

    

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GREISEN - Carrock Mine, Cumbria

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Home > MINERALS > MINERALS FROM BRITAIN AND IRELAND FOR COLLECTORS > NORTHERN AND CENTRAL ENGLAND


GREISEN

Carrock Mine, Caldbeck Fells
Cumbria
  

Originally a German mining term, Greisen is a rock containing mainly mica and quartz, and formed by the alteration of granite.

  

During the final phases of cooling, when the granite is crystallising, hot water and gases are released from the melt and forced into the interstitial spaces of the granite at the upper margins of the pluton, in a process known as ‘greisenisation’.

  

Greisen is often a natural concentrate of minerals of economic importance such as the ores of tin and tungsten, and also gemstones such as topaz.

  

Click on a picture for a larger image


Size: 9 x 7 x 3 centimetres
Weight:  168 grams

PRICE: £12.00