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Description: | Specimen of a fossil trilobite, Angelina sedgwicki Salter, collected from unspecified rocks of Early Ordovician, Late Tremadoc age from Garth (Farm ?), Porthmadoc, Gwynned (Wales). Collected by E.J. Garwood.
This trilobite is about 490 million years old and lived on the bottom of the sea. When it died, the skeleton was covered in mud and it became fossilised. The mud hardened and became a mudstone. Later, the continents (land masses) on each side of the Ordovician sea slowly moved towards each other so that the sea slowly disappeared. This caused the mudstones of the seabed to be squeezed and heated and turned into a much harder rock called a slate. This is why the trilobite looks squashed.
The specimen was found in Wales.
It is from the Ordovician period (495 - 443 million years ago) | Publisher: | Tyne & Wear Archives & Museums | Subjects: | Classification: Animalia E.J. Invertebrata Garwood Trilobita Arthropoda | Temporal: | Ordovician period (495 - 443 million years ago) | Source: | Tyne & Wear Archives & Museums | Identifier: | http://www.twmuseums.org.uk/geofinder/se... | Go to resource |
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