SEPTARIA (POLISHED HALF OF A NODULE) - Norfolk
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Cut and polished half of a septarian nodule
Downham Market, Norfolk
Septarian nodules or 'septaria', are remarkable natural objects. They are round concretions containing a network of internal cracks that have been filled with minerals, particularly brown and yellow calcite.
The cracks are called ‘septa’ from the Latin word septum or ‘partition’, which gives the nodules their name. Exactly how these nodules were formed is still not fully understood.
Downham Market, Norfolk
Septarian nodules or 'septaria', are remarkable natural objects. They are round concretions containing a network of internal cracks that have been filled with minerals, particularly brown and yellow calcite.
The cracks are called ‘septa’ from the Latin word septum or ‘partition’, which gives the nodules their name. Exactly how these nodules were formed is still not fully understood.
This example is a cut and polished half of a nodule that originated in the Kimmeridge Clay of Jurassic age.
A free plastic stand is included.
Click on a picture for a larger image
Size: approx. 10 x 9 x 3.5 centimetres
Weight: 388 grams
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