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How can you tell what type of rock you have? Join us to learn how you can tell one type of rock from another. The notes for our course are a free download available on our website: Get the Rock Identification Flowchart from our Teachers Pay Teachers page: The layered rock in the thumbnail image on the far left is called Vernon wonderstone. It comes from a quarry in Utah and is technically a “welded-vitric tuff,“ a type of volcanic rock. The colorful banding is caused by groundwater with iron oxides that altered the tuff. It's one of my favorite rocks and I meant to show it during our lesson but didn't end up having time to talk about it in the video lesson. Participate in the polls at: Support the creation of this course (and future courses) by becoming one of our patrons at
