Tasmanite (in the narrow sense of the word: found in Tasmania) — a polysemantic term from the field of geology and mineralogy. The term originally appeared in 1864–1865, when Professor A. H. Church carried out a series of studies in several oil shale deposits on the banks and in the vicinity of the Mersey River (northern Tasmania), collected samples and made analyzes, based on the results of which the sedimentary rock was first described called tasmanite,[1]: 92 and a year later the mineral of the same name appeared.[2]: 317