Found this cool rock at lake Tahoe. It has 2 white rings around it that are so perfect I thought at first they were drawn. Now it lives in my Chia pet garden. Here's an additional pic.
this post was submitted on 30 Dec 2025
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Cool Rocks
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Minerals are cool, too.
Be gneiss to each other.
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They aren't rings, but layers. There were likely many more cracks that filled and created other layers that later broke apart and eroded to form this rock.
Again,