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Figure 3

From: Glendonite occurrences in the Tremadocian of Baltica: first Early Palaeozoic evidence of massive ikaite precipitation at temperate latitudes

Figure 3

Photographs of glendonites and sedimentary features from the East Baltic black shales; (a) GIT 366-296, section of a drill core showing silty sandstone alternating with thin layers of black shale (bs) bearing glendonites (gl), D-223 borehole; (b) rosette cluster of glendonite, Toolse Member (Paltodus deltifer pristinus Zone), Napa, Estonia; (c,f,h) cross sectional view of two rosette glendonite clusters, cross sectional view of “glendonite bed”, and stellate glendonite cluster, Koporiye Formation (Cordylodus angulatus Zone), Syas River near Yurtzevo, Russia; (d) bedding surface of black shale with wave generated symmetrical ripple marks, Tabasalu Member (Cordylodus angulatus Zone), Pakri Cape; (e) GIT 571-19, two stellate glendonite clusters, Tabasalu Member (Cordylodus angulatus Zone), D-32 borehore, Vidruka; (g) TUG 220-77b, blade-shaped glendonite, Tabasalu Member, F-350 borehole, Kirimäe; (b,d–f) scale bars are 1 cm; (e,g) scale bars are 5 mm; (a–g) photo by H. Bauert; (h) photo by A. Dronov.

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