Delwedd:BasaltUSGOV.jpg

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Gall y ffeil hon gael ei defnyddio gan nifer o brosiectau eraill.

English: Basalt.
Svenska: Basalt
Public domain This image is in the public domain because it contains materials that originally came from the United States Geological Survey, an agency of the United States Department of Interior. For more information, see the official USGS copyright policy
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