FIGURE 2 in Morphological features and new description of the fossil species Thalassiosira dolmatovae (Bacillariophyceae)

FIGURE 2: Generalized stratigraphic column of the Milky River Formation at the Sandy Ridge stratigraphic section with levels of diatom-bearing samples (after Gladenkov 2003, 2006) and occurrence of Thalassiosira dolmatovae. 1—fine- and medium grained sandstones. 2—coarse and very coarse grained sandstones. 3—conglomerates and gritstones. 4—coal. 5—tuff. T.—Thalassiosira. C.—Cosmiodiscus. Arrows indicate the levels of the first (F) and last (L) occurrences of biostratigraphically important diatom species. The wavy line indicates an angular unconformity separating the Milky River Formation and underlying strata.