Extended Data Fig. 4: Continental margins with similar characteristics to the Mauritanian margin and gas hydrate.
From: Long-distance migration and venting of methane from the base of the hydrate stability zone
Calculated thickness of the theoretical gas hydrate stability zone41 around the globe with examples of hydrate provinces42 hosted on continental margins with comparable characteristics. Green dots – seismic evidence for the existence of simple graded margins32,43,44,45,46; red dots – seismic evidence for the landward limit of marine hydrate where the dip of the BHSZ > the dip of strata4,15,20,30,32,43,45,47,48,49; blue dots – BHSZ is approximately concordant with strata on the continental slope4,20,30,32,43,44,45,46,48,50; black dots – pockmarks significantly (up to10s of km) beyond the landward limit of marine hydrate30,32,49.
