dates back to 9 My (beginning of the Tortonian) thus trace since this period a thermal subsidence and a tilting of the platform of at least 150 m west of Iceland, allowing an accentuation of the thermohaline circulation (section 3.1 of Volume 2). The flooded glacial valleys of the southern part of the Northwest Peninsula (Figure 1.10) also illustrate this evolution.
The eastern coast of the island, on the other hand, has a different history. It includes an older surface, located today at a depth of 1,000 m, which may have been shaped in the Bartonian age, a key period for the tectonics of the Atlantic margins (Chapter 3).
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Tarduno,
