This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Rhyolite porphyry. Rhyolite porphyry Scale bar in lower left is cm Collected near Mt Elbert Colorado in Own Jstuby en Jstuby Original upload log page en Rhyoliteporphyry Jstuby bytes no porphyry Scale bar in lower left is cm Collected near Mt Elbert Colorado in Porphyry Rhyolite
Page 2023 Free-images.com. All images are Public Domain