POTATO-STONE - Wells, Somerset
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A geode lined with quartz crystals
Dulcote Quarry, near Wells, Somerset
The Mendip Hills area has yielded some beautiful quartz geodes. They occur as nodules in the red, marly clays overlying the Carboniferous Limestone. These clays were laid down in an arid, tidal-flat environment during the Triassic period (200 million years ago) when Britain was situated in the tropics.
These geodes are known as a 'potato-stones' due to their external appearance.
Dulcote Quarry, near Wells, Somerset
The Mendip Hills area has yielded some beautiful quartz geodes. They occur as nodules in the red, marly clays overlying the Carboniferous Limestone. These clays were laid down in an arid, tidal-flat environment during the Triassic period (200 million years ago) when Britain was situated in the tropics.
These geodes are known as a 'potato-stones' due to their external appearance.
This small example contains sparkling quartz crystals and black crystals of goethite.
Size: approx. 7 x 6 x 5 centimetres
Weight: 190 grams