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[1] A long-standing question in geodynamics is the cause of deviations of ocean depth or seafloor topography from the prediction of a cooling half-space model (HSC). Are the deviations caused entirely by mantle plumes or lithospheric reheating associated with sublithospheric small-scale convection or some other mechanisms? In this study we analyzed the age(More)
Seafloor roughness varies considerably across the world's ocean basins and is fundamental to controlling the circulation and mixing of heat in the ocean and dissipating eddy kinetic energy. Models derived from analyses of active mid-ocean ridges suggest that ocean floor roughness depends on seafloor spreading rates, with rougher basement forming below a(More)
A useful approach to data interpolation is to determine the Green’s function for the interpolation operator and construct the interpolation from the super-positioning of suitably scaled Green’s functions located at the data constraints. Such Green’s functions have been determined for Cartesian splines in 1-, 2-, and 3-D, including regularized splines and(More)
Magnetic anomaly identifications underpin plate tectonic reconstructions and form the primary data set from which the age of the oceanic lithosphere and seafloor spreading regimes in the ocean basins can be determined. Although these identifications are an invaluable resource, their usefulness to the wider scientific community has been limited due to the(More)
Electron backscatter diffraction analysis of dendritic clinopyroxene (cpx) forming in rapidly cooled basalt reveals two features that are unexpected for phases growing from a liquid: (1) helical growth about {010}cpx, the crystallographic b-axis, with incremental rotation (up to 0.4° μm–1) within branch segments and large rotational jumps (10°–46°) between(More)
Marine geophysical data collected by government and academic vessels are archived at the US National Geophysical Data Center in Boulder, Colorado. Data exchanges between NGDC and source institutions use an ASCII, punch-card format known as the MGD77 format, reflecting a style of file design common in the 1970s. We have developed a set of new software tools(More)