The clathrates in these deep deposits are thought to have formed in situ from the microbially produced methane, since the δ13C values of clathrate and surrounding dissolved methane are similar.
Os clatratos nestes depósitos profundos crese que se formaron in situ a partrir do metano producido polos microbios, xa que os valores de δ13C do clatrato e o metano disolvido que os rodean son similares.