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Showing results for tags 'coarse'.
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Hello, I found this rock in a metamorphesized area of chlorite schist with tons of giant quartz veins everywhere. I found this mineral which I have never seen before and it was also present in the quartz. it’s brown and coarse as if it were sandstone. What could it be?
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Hello everyone, it's my first post here. Recently around the Gulf at Muscat, Oman, I found this tube-like structure bind strongly to a rock after some digging with my hands under the water on a remote small beach (no signs of previous visits there.) There's no sand on that shore, instead a coarse-sand-like nature of very small shell and rock fragments. The start of this tubular structure is very narrow, and its radius increases as it appears to curl in a life-like form of some organism. Unfortunately the top appears missing when I found it.