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Benson and his colleagues studied samples of both smectite and illite drilled from the ground throughout the caldera.—Rahul Rao, Popular Science, 30 Aug. 2023 In 2018, Wallace co-led an offshore drilling expedition to Hikurangi, which pulled up a lot of clay sediments rich in the mineral smectite, often used by the oil and gas industry as a lubricant in drilling muds.—Bypaul Voosen, science.org, 21 June 2023
Word History
Etymology
smectis fuller's earth, modification of Greek smēktris kind of fuller's earth, from smēchein to clean
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