a. Geol. [f. med.L. turbāria peat-bog + -AN.] Of or pertaining to peat-bogs; denoting a subdivision of the Pleistocene or glacial period, during which extensive deposits of peat were formed in Northern Europe and Asia.
1895. J. Geikie, in Jrnl. Geol. (Chicago), III. 251. ‘Lower Turbarian’ Fifth glacial epoch. Ibid., 252. ‘Upper Turbarian’ Sixth glacial epoch.
