IRIDESCENT JURASSIC AMMONITE - 200 million years old - Somerset
« backJURASSIC AMMONITE
Psiloceras planorbis
200 million years old
Watchet, Somerset
An iridescent ammonite from the classic fossil-bearing rocks of the north Somerset coast. It has an iridescent shell which consists of layers of the mineral aragonite which scatter light to produce the rainbow colours. Most of these fossils have been squashed flat before they were fossilised but they are otherwise well-preserved.
Watchet, Somerset
An iridescent ammonite from the classic fossil-bearing rocks of the north Somerset coast. It has an iridescent shell which consists of layers of the mineral aragonite which scatter light to produce the rainbow colours. Most of these fossils have been squashed flat before they were fossilised but they are otherwise well-preserved.
The rocks that make up this part of the Somerset coast are called the Lower Lias, which date from the very beginning of the Jurassic period.
Important note: This fossil is from an old collection and was collected several decades ago. There are now collecting restrictions at this site.
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Size: approx. 11.5 x 11.5 x 2 centimetres
Weight: 332 grams