Geophysical Rorschach Test: Seafloor topography in the Darwin Rise (shown corrected for sediment loading) shows linear swells and broad regions between them. The topography can be viewed via three quite different depth anomaly maps, depending on the reference model used to define the anomaly. Depth anomalies are divided into those within 500 m (about one data standard deviation) of that predicted (green), those shallower (red), and those deeper (blue). Relative to a halfspace or the PSM model, most of the area is anomalously shallow, as would be the case for most lithosphere of this age. In contrast, relative to the GDH1 model, the region contains shallow linear swells separated by essentially normal-depth seafloor. The tectonic interpretation thus depends on the map chosen. ('OJP' denotes Ontong Java Plateau (not a swell), 'Midpacs' denote Mid-Pacific Mountains, 'Wake Gyts' denote the Wake Guyots)


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