SEPTARIA (POLISHED SECTION OF A NODULE) - Norfolk
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Cut and polished section 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 slice of a water-worn nodule that originated in the Kimmeridge Clay of Jurassic age. Polished on one side. Presented in a lidded gift box.
Click on a picture for a larger image
Size: 16.5 x 6 x 1.5 centimetres
Weight: 318 grams
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