SEPTARIAN NODULE (VERY FINE CUT AND POLISHED SPECIMEN) - Holderness Coast, Yorkshire
« backJURASSIC SEPTARIAN NODULE
Cut and polished
Holderness coast, Yorkshire
A rare and beautiful cut and polished half of a septarian nodule from Yorkshire. It is derived from the boulder clay and was brought south to Holderness by an ice sheet during the Ice Age.
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.
Holderness coast, Yorkshire
A rare and beautiful cut and polished half of a septarian nodule from Yorkshire. It is derived from the boulder clay and was brought south to Holderness by an ice sheet during the Ice Age.
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.
Please note: This specimen weighs nearly 1.5 kilograms
Click on a picture for a larger image
Click on a picture for a larger image
Size: approx. 18 x 14 x 3.5 centimetres
Weight: 1.44 kilograms
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