Table T1. The oldest crust drilled by ODP in the different ocean basins.
Leg 185, Site 801: West Pacific, Pigafetta Basin |
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Water depth (m): 5674 |
Total depth (m): 6609.7 |
Penetration (m): 935.7 |
Basement (mbsf): 461.6 |
Basement penetration (m): 474.1 |
Magnetic lineation: >M36 |
Oldest sediment: Bajocian-Bathonian (166 Ma) |
Basement age: Alkalic cap (155 Ma) |
Tholeiites: >155 <171 Ma |
The oldest basement drilled in the oceans. |
Leg 76, Site 534: West Atlantic, Blake-Bahama Basin |
Water depth (m): 4973 |
Total depth (m): 6639.5 |
Penetration (m): 1666.5 |
Magnetic lineation: M28 |
Oldest sediment: mid-Callovian (~155 Ma) |
Basement: core catcher, no radiometric age |
The oldest Atlantic basement drilled. |
The deepest penetration. |
Leg 123, Site 765: Argo Abyssal Plain, Indian Ocean |
Water depth (m): 5713.8 |
Total depth (m): 6908.7 |
Penetration (m): 1194.9 |
Casing string (m): 937 |
Basement (mbsf): 947.9 |
Basement penetration (m): 247 |
Magnetic lineation: M25a |
Oldest sediment: early Berriasian (140 Ma) |
Basement age: >156 Ma; Ar/Ar fusion |
Celadonite age: 155 Ma; K/Ar |
The oldest Indian Ocean basement drilled. |
The greatest total depth. |