Table T1. Simplified summary of Leg 183 drill sites where volcanic rock was recovered.

Site
Location
Coordinates
Water
depth (m)
Basement recovery (m)
Lithologic description
Paleoenvironment
Age (Ma)*
1136 Southern Kerguelen Plateau 59°39.1´S, 4°50.1´E 1930.6 18.4 Inflated pahoehoe flows of massive basalt Subaerial 119
1137 Elan Bank 56°50.0´S, 68°05.6´E 1004.5 105.5 Crystal vitric tuff and brecciated basalts Subaerial 108
1138 Central Kerguelen Plateau 53°33.1´S, 75°58.5´E 1141.4 69.0 Volcaniclastic deposits and multiple basalt flows Subaerial 100
1139 Skiff Bank 50°11.1´S, 63°56.2´E 1415.3 87.3 Altered volcaniclastic rocks and multiple basalt flows Subaerial 69
1140 Northern Kerguelen Plateau 46°15.6´S, 68°29.5´E 2394.1 49.1 Submarine pillow and massive basalts Submarine 34
1141 Broken Ridge 32°13.6´S, 97°07.7´E 1196.9 39.1 Altered basalts and mafic lava flows Subaerial 95
1142 Broken Ridge 32°13.9´S, 97°07.5´E 1200.8 17.3 Massive and pillowed basalt and volcanic breccia Submarine? 95

Note: * = new basement ages reported by Pringle and Duncan (2000) and Figure F1.