Figure F1. A. Regional map of the Southeast Indian Ocean (modified after Pyle et al., 1995), showing magnetic anomaly (numbers) and Australian Antarctic Discordance (AAD) along the Southeast Indian Ridge. The thin dark V shape east of the AAD indicates an inferred trace of a hypothetical isotopic boundary migrating at ~40 mm/yr (see Christie et al., 1998, for details). Broader gray-colored V shape indicates an approximate trace of the depth anomaly. B. Drill sites during ODP Leg 187 (modified after Shipboard Scientific Party, 2001) with seafloor isochrons.

Figure F1. A. Regional map of the Southeast Indian Ocean (modified after Pyle et al., 1995), showing magnetic anomaly (numbers) and Australian Antarctic Discordance (AAD) along the Southeast Indian Ridge. The thin dark V shape east of the AAD indicates an inferred trace of a hypothetical isotopic boundary migrating at ~40 mm/yr (see Christie et al., 1998, for details). Broader gray-colored V shape indicates an approximate trace of the depth anomaly. B. Drill sites during ODP Leg 187 (modified after Shipboard Scientific Party, 2001) with seafloor isochrons.