| Figure 58. Outlines of the dry land of East Asia at the boundary of the tertiary and quaternary periods. (According to Lebedev, 1968.) |
| 1 - contemporary dry land (continent and islands); 2 - inner basins of the beginning of the quaternary period at the site of the deepest portions of contemporary marginal seas; 3 - flat areas of the bottom of contemporary marginal seas which were parts of the dry land at the beginning of the quaternary period; 4 - boundary of the dry land at the beginning of the quaternary period. |
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