Fig. 2

Global distribution of Paleogene glauconite. Note that glauconite occurs mostly in the four zones marked by dashed rectangles, viz. a) North American continental margin (eastern and western Gulf coastal plain deposits), b) Palaeo-Tethys, including northern Africa, parts of southern Europe, Middle East and India to the east, c) Palaeo-North Sea deposits, extended from UK to the west to northern Germany in the east, and d) High southern latitudes, including New Zealand including a few deposits from eastern Tasman Plateau (numbers correspond to those provided in Table 1)