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ONCOLITE (STROMATOLITE CONCRETION) (SMALL CUT SLICE) - France

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ONCOLITE
(STROMATOLITE CONCRETION)

55 million years old
 

Montchenot, Villers-Allerand,

Marne, France

 

A cut slice of a nodule known as an ‘oncolite’ from an algal band in the Tertiary limestone.

  

Oncolites are spherical structures formed by the growth of cyanobacteria (also known as blue-green algae). They are very similar to stromatolites but instead of being dome-shaped, they form spherical nodules. They usually form around a nucleus such as a gastropod shell.

  

Provided with a free plastic stand.

Click on a picture for a larger image


Size: approx. 9.5 x 8 x 1 centimetres
Weight:  138 grams


PRICE: £20.00