Oolitic limestone, 10x mag, XPL.
— Melissa Scruggs (@VolcanoDoc) March 7, 2019
Ooids form when a mineral (in this case calcite) crystallizes around a nucleus in a concentric pattern - much in the same way that oysters make pearls.#ThinSectionThursday pic.twitter.com/CsEu5YfZwC
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March 07, 2019 at 11:27PM
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