this post was submitted on 30 Dec 2025
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Cool Rocks
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A place for:
- Sharing cool rocks you found
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- Cool rocks
Minerals are cool, too.
Be gneiss to each other
Please use posts for your rocks. Feel free to add more pictures and links to articles in the post text.
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I once found a river cobble that had so many chapters to its story. The reconstruction goes like this: Sedimentary (shale), + heat and pressure, metamorphosed into gneiss (precambrian). Fractured and intruded by hydrothermal fluids. Broken apart and tumbled into a river channel, buried and re-lithified into a conglomerate. Re-metamorphosed into a quartzite. Uplifted in a mountain chain, eroded out during Pleistocene, found by me on a terrace of river gravels like 10 yrs ago.
Well, that was a fucking beautiful description.