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Meta & Minerals

LINK TO THE FREE ROCK IMAGE ID KEY, FOR EASY ROCK ID: https://rockpapa.github.io/Rock-Image... Metamorphism & Minerals – What Really Happens to Quartz, Feldspar & Biotite Howdy rock friends! Rock Papa here 👋 In this video, we take a deep dive into how specific minerals respond to metamorphism as temperature, pressure, and water availability change. In the previous video, we introduced the three metamorphic facies: Greenschist facies (low temperature, low pressure, lots of water) Amphibolite facies (moderate temperature & pressure, decreasing water) Granulite facies (high temperature, high pressure, very little water) 👉 Today’s focus is minerals, not rock names. We look closely at how common minerals behave across these facies, including: Quartz Muscovite Biotite Potassium feldspar (K-spar) Sodium feldspar (albite) Clay minerals Hornblende, pyroxene, olivine, garnet, and more You’ll learn: Why greenschist facies is all about hydration How amphibolite facies marks the shift from hydration to dehydration Why granulite facies eliminates all hydrated minerals Which minerals stay stable, which break down, and which reform Why certain minerals participate in metamorphic banding Why granulite rocks are rare in the field ⚠️ This video is detailed and technical, and that’s intentional. Think of it as a reference video you can come back to when you need it. 👉 If this feels confusing, don’t worry! The next (third) metamorphism video will simplify everything by focusing on actual rock types formed at each metamorphic grade — and it will tie all of this together in a much easier way. I also share a quick update on progress with the Rock Image ID Key app, which is moving along nicely and heading toward full app development. If you find this video useful: 👍 Give it a like 🔔 Subscribe for more geology explained clearly 💬 Drop questions or comments below Thanks so much to all my excellent subscribers. Until next time — Happy rock hunting! — Papa Rocks 🪨