Page 369 - Petroleum Geology

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or 5 km of overburden, and so such instability is necessarily contemporaneous
with the diagenesis of organic matter and with the expulsion of the bulk of
the pore fluids in the mudstones (both in the overburden and below). If the
mudstones are petroleum source rocks, in whole or in part, diapiric structures
are contemporaneous with petroleum generation and so may form traps. The

Fig. 15-11. Map showing the directions of salt migration, northwestern Germany (located
on Fig. 15-8). (Reproduced from Sannemann, 1968, p. 269, fig. 9, with permission.)