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Summer brings quiet paddling, kayaking, and beach camping among tufa towers.—Ted Alvarez, Outside, 9 Mar. 2026 Carved from porous tufa stone once covered by the sea, the four wine cathedrals are considered an engineering marvel.—Irene S. Levine, Forbes.com, 17 Jan. 2026 As the saline lake retreated, rock formations called tufa, which had formed underwater, were left exposed along the shorelines.—Ian James, Los Angeles Times, 2 June 2024 But at Trocadero Soda Springs, an unusual effervescence comes from the water filtering through a crust of tufa made from hard deposits of silica or calcium carbonate.—Shoshi Parks, Smithsonian Magazine, 25 Jan. 2024 See All Example Sentences for tufa