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Figure F1. Atlantis Massif just west of the Mid-Atlantic Ridge spreading axis. Tectonic features, location of Hole U1309D (black circle), and seismic lines are indicated: white = MCS, dark gray = NOBEL deep source/ocean-bottom seismometer (OBS) refraction, light gray = traditional air gun/OBS refraction. Corrugations on domal core mark exposed detachment fault, well-mapped along south edge of the Southern Ridge and inferred from morphology and talc-schist fragments recovered in upper several meters (only) on Central Dome. Hanging wall block(s) are volcanic.

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