English: Geology explained! The most junior member of the geology excursion has discovered an excellent example of flow banding in a rhyolitic boulder; the expert describes the process of its formation.
This image was taken from the Geograph project collection. See this photograph's page on the Geograph website for the photographer's contact details. The copyright on this image is owned by ceridwen and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
== {{int:filedesc}} == {{Information |description={{en|1=Geology explained! The most junior member of the geology excursion has discovered an excellent example of flow banding in a rhyolitic boulder; the expert describes the process of its formation.}} |d