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Carl Bowin and Dan McKenzie analysed ship-track gravity and bathymetry across the Atlantic. Treating the profiles spectrally lets a transfer relation predict part of the gravity signal from seafloor relief.^[ref]

Residual gravity highlights structures not accounted for by the fitted topographic contribution. Its interpretation still requires assumptions about subsurface density and support.

Dan McKenzie and Carl Bowin used the spectral relation between Atlantic bathymetry and gravity to investigate how seafloor loads are supported. The method separates a topography-correlated signal from residual structure.^[ref]

The wavelength dependence is useful because shallow loads, compensation and lithospheric flexure contribute differently across spatial scales. A single gravity anomaly does not isolate those contributions.

By Dan McKenzie and W. J. Morgan. Nature 224, 125–133. The original paper develops plate-velocity constraints for the migration and kinematic stability of triple junctions.

W. J. Morgan contributed to the kinematics of plate tectonics. With Dan McKenzie, he analysed how the relative motions of three plates constrain the evolution of a triple junction.^[ref]

The physical issue is compatibility: three separately specified boundary motions must meet at one moving junction. This makes a plate reconstruction more restrictive than drawing plausible boundary lines independently and helps distinguish configurations that can persist from those requiring a change of geometry.