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Geology Rocks
c/geology-rocks•caseywestcaseywest•1d ago

Question about a weird rock I found near the old quarry in Springfield

I was out walking my dog near the old limestone quarry in Springfield last weekend. My dog started digging at the base of a big pile of tailings and uncovered this rock that looked like it had little green crystals all through it. At first I thought it was just some slag or something, but when I got it home and washed it off, the crystals were really clear. I took a picture and showed it to my friend who works at the community college. He said it looked like olivine in basalt, which is weird because that quarry is all sedimentary rock. He thinks maybe a glacier dropped it there during the last ice age, like 10,000 years ago. I never really thought about how rocks can travel so far from where they formed. It makes me look at every loose rock in a field differently now. Has anyone else found a rock that just didn't belong where it was?

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Digital Art Showcase
c/digital-art-showcase•caseywestcaseywest•7d ago
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