Petrified oak. Polished section of a fossil of the trunk of an oak tree (Quercus sp.). This specimen is approximately 33 centimetres across. It is from Saddle Mountain, Washington, USA, and dates from the Miocene epoch (23 million years ago). It is part of the collections held at the Natural History Museum, London, UK.

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TOP11715746

Source:

達志影像

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RM

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須由TPG 完整授權

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