Tyndall stone

== English == === Etymology === After the town of Tyndall, Manitoba, where the stone is quarried, in turn named after Irish physicist John Tyndall (1820–93). Tyndall, Tindall (“inhabitant of the Tyne river valley”) < Tyne. === Pronunciation === IPA(key): /ˈtɪndəl stoʊn/ === Noun === Tyndall stone (usually uncountable, plural Tyndall stones) (Canada) A dolomitic limestone quarried in the vicinity of Tyndall, Manitoba, Canada, famous for its pervasive mottling and numerous fossils. ==== Synonyms ==== Tyndall limestone