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IRONSTONE CONCRETION - Sahara Desert, Morocco

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Home > MINERALS > UNUSUAL ROCKS AND MINERALS - WEIRD AND WONDERFUL !

IRONSTONE CONCRETION
 
Sahara Desert, Morocco
  
In unconsolidated sedimentary rocks iron is often dissolved in the groundwater and can be redeposited as hard, insoluble layers of iron oxide.  Round or angular concretions are sometimes formed, consisting of concentric layers of iron minerals such as limonite and goethite.  
  
In this case the concretion consists of layers of varying hardness which have been picked out by erosion. 
  
A curious item. One for the collector of unusual works of nature!

 
Click on a picture for a larger image
Size: 9 x 6 x 5 centimetres
Weight: 323 grams

PRICE: £16.00
Sorry, this item has been sold or is out of stock
IRONSTONE CONCRETION - Sahara Desert, Morocco
IRONSTONE CONCRETION - Sahara Desert, Morocco IRONSTONE CONCRETION - Sahara Desert, Morocco IRONSTONE CONCRETION - Sahara Desert, Morocco IRONSTONE CONCRETION - Sahara Desert, Morocco