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Description: | There are the remains of two trilobite fossils in this siltstone rock. Trilobites were segmented animals which crawled on the seabed scavenging for food. After death, the segmented (jointed) trilobite shells usually fell to pieces. If you look carefully, you can see that this had already started to happen with the largest shell before it became fossilised. The pointed tail (pygidium) had broken away from the segments making up the body (thorax). The calcium carbonate shells of both trilobites have been dissolved away and only the impressions (moulds) remain as fossils. | License: | http://www.imagine.org.uk/about/copyright/ | Rights holder: | Tyne & Wear Museums | Subjects: | fossils natural world | Source: | Tyne and Wear Imagine | Identifier: | http://www.imagine.org.uk/details/index.... | Go to resource |
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