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Figure F1. Atlantis Massif on the western Mid-Atlantic Ridge flank of the ridge-transform intersection. Main tectonic features and locations of Hole U1309D (black circle) and seismic lines are indicated: white = multichannel seismic, dark gray = refraction from NOBEL deep source/OBS, light gray = refraction from traditional air gun/OBS. Corrugations on domal core mark exposed detachment fault, well-mapped along the southern edge of the Southern Ridge and inferred from morphology and talc schist fragments recovered in upper few meters (only) on Central Dome. Volcanic hanging wall block(s) are also shown.

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