Uplift, deflation and marine onlap of a Jurassic rift dome, illustrated by a backstepping Middle–Upper Jurassic shelf‐to‐slope succession, Geographical Society Ø, East Greenland

“Doming–rifting–spreading” constitute the main phases of classical plate tectonics. The Middle–Upper Jurassic succession East Greenland is interpreted as reflecting formation, deflation and onlap a rift dome, similar to contemporaneous domes in North Sea, Denmark southern Sweden. forms northwards backstepping onlapping early N–S oriented basin. Deposition ranged from coastal over shallow marine slope sands, through offshore siltstones deep basinal mudstones. An outlier on island Geographical Society Ø fills an important gap documentation doming, progressive onlap. Bajocian deposition took place shelf. This was followed late Oxfordian by base-of-slope deposition. onlaps progressively older rocks towards north, illustrating gradual deflation, erosion constituting part doming–rifting–spreading