Table T1. Planned drill site details.
| Site |
Location (latitude, longitude) |
Water depth (m) |
Penetration (mbsf) |
Expected sediment type |
Estimated bottom age |
Site-specific objectives |
|
| Planned | Approved | ||||||
| Bowers Ridge | |||||||
| BOW-12B | 53°24.0′N, 179°31.3′W | 1313 | 745 | 745 | Hemipelagic silty clay with siliceous and calcareous microfossils | late Miocene | Entry location for Pacific water, shallow end of depth transect |
| BOW-14B | 54°02.0′N, 179°00.5′E | 2166 | 555 | 600 | Hemipelagic silty clay with siliceous microfossils | late Miocene | Entry location for Pacific water, deep site on the ridge |
| BOW-15A | 54°49.7′N, 176°55.0′E | 837 | 165 | 165 | Hemipelagic silty clay with siliceous and calcareous microfossils | middle Pliocene | Shallow end of depth transect |
| Gateway | |||||||
| GAT-3C (alternate) | 59°03.0′N, 179°12.2′W | 3209 | ~500 | 745 | Silty clay with siliceous microfossils | late Miocene | Gateway to the Arctic, deep end of depth transect |
| GAT-4C | 57°33.4′N, 175°49.0′W | 1975 | 745 | 745 | Hemipelagic silty clay with siliceous and calcareous microfossils | late Miocene | Gateway to the Arctic |
| NAV-1B (alternate) | 60°9.192′N, 179°28.202′W | 1130 | 150 | 150 | Intermittently laminated hemipelagic silty clay with siliceous and calcareous microfossils | Pleistocene | Late Pleistocene history of Bering Sea at submillennial timescales |
| Kamchatka Strait (Russia) | |||||||
| KST-1B | 55°55.6′N, 164°54.9′E | 3435 | 200 | 200 | Hemipelagic silty clay with siliceous microfossils | Pliocene | Gateway to the Pacific, western end, deep end of depth transect |
| Shirshov Ridge (Russia) | |||||||
| SHR-1B (alternate) | 57°19.0′N, 170°06.4′E | 963 | 200 | 200 | Hemipelagic silty clay with siliceous and calcareous microfossils | Pliocene | Sea ice and water mass distribution in northeast region |
| SHR-3B | 56°26.1′N, 170°37.2′E | 2232 | 200 | 200 | Hemipelagic silty clay with siliceous microfossils | Pliocene | Sea ice and water mass distribution, distal to Pacific water |
| Umnak Plateau | |||||||
| UMK-4D | 54°40.2′N, 169°58.9′W | 1900 | 200 | 200 | Hemipelagic silty clay with siliceous and calcareous microfossils | Pliocene | Sea ice and water mass distribution, distal to Pacific water |
| UMK-3B (alternate) | 54°25.1′N, 170°14.6′W | 1898 | 200 | 200 | Hemipelagic silty clay with siliceous and calcareous microfossils | Pliocene | Sea ice and water mass distribution, distal to Pacific water |
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