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Recent identification of calcite — a form of calcium carbonate — in the fossil eggshells suggested that the eggs would be good candidates for U-Pb dating, researchers reported Thursday in the journal Frontiers in Earth Science.—Mindy Weisberger, CNN Money, 12 Sep. 2025 The sound of the metal tips of my trekking poles scraping against the calcite rock was impossible to muffle.—Katie Jackson, Outside, 11 Sep. 2025 At the time the paintings were made, the cave entrance would have been open to humans and animals – and indeed, the skulls of bear, elk and other fossilized bones are scattered within, entombed in calcite drippings.—Matthew Carey, Deadline, 4 Sep. 2025 Researchers collected samples from the Petralona skull’s calcite coating and from various locations throughout the cave.—Andrew Paul, Popular Science, 20 Aug. 2025 See All Example Sentences for calcite
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