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Description: | This rock probably came from the Sunderland area, the only known locality for cannonball limestone. It is approximately 250 million years old, but, unfortunately, no one knows exactly how it formed. The name, cannonball limestone, describes the spherical shapes that this rock often shows, but it sometimes forms masses that look like plants or coral and other strange shapes. They are often mistaken for fossils. | License: | http://www.imagine.org.uk/about/copyright/ | Rights holder: | Tyne & Wear Museums | Subjects: | North East rocks and minerals natural world | Source: | Tyne and Wear Imagine | Identifier: | http://www.imagine.org.uk/details/index.... | Go to resource |
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