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| Detailed Seamount Information |
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| Combe Reef Seamount |    |
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| Index | SMNT-124S-1775W |
Classification | Intermediate B1 Seamount |
| Location | 12º 26.84' S
177º 31.36' W |
Elongation
Irregularity | 1.13 ± 0.03
1.23 ± 0.12 |
| Plate Age | |
Oceanic Province | Abyssal Plain |
| Region | Samoan Hotspot Trail |
Alternative Names | Isabella Bank, Cook Knolls, Combe |
| Plate | Pacific Plate |
Age | 14 Ma |
| Tectonic Setting | Hotspot Trail |
Seamount Top | 125 m |
| Volume | 5720 km3 |
Ocean Bottom | 2580 m |
Shelf Edge
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Volcanic Activity | Extinct |
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| | Description | | Combe bank is located at 12¿ 26.8' S, 177¿ 31.3' W and is part of the Samoan Hotspot Trail on the Pacific Plate. The seamount is 2455 m tall with the top at -125 m and ocean bottom at -2580 m. It is intermediate in size with a volume of 5720 km3. The seamount is fairly round with a semicircular shape and a terrace at 1200 m depth on its southwestern flank. The seamount has an azimuth of approximately 162¿ and edges that are slightly irregular. Combe is approximately 220 km west of Lalla Rookh Bank and is differrent from Tavinui, Field and Lalla Rookh in that it is larger with a larger shallow bank and its principle break in slope is approximately 900 m shallower. |
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Combe Reef Seamount -- Multibeam data merged with predicted satellite bathymetry |
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Combe Reef Seamount -- Multibeam bathymetry |
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Combe Reef Seamount -- Predicted satellite bathymetry |
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Combe Reef Seamount -- Residual bathymetry |
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Samoan Hotspot Trail -- Multibeam bathymetry |
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Samoan Hotspot Trail -- Predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 2 -- Multibeam data merged with predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 2 -- Multibeam bathymetry |
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Samoan Hotspot Trail -- Tile 2 -- Predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 2 -- Residual bathymetry |
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Samoan Hotspot Trail -- Tile 3 -- Multibeam data merged with predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 3 -- Multibeam bathymetry |
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Samoan Hotspot Trail -- Tile 3 -- Predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 3 -- Residual bathymetry |
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Combe Reef Seamount -- Multibeam data merged with predicted satellite bathymetry |
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Combe Reef Seamount -- Multibeam bathymetry |
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Combe Reef Seamount -- Predicted satellite bathymetry |
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Combe Reef Seamount -- Residual bathymetry |
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Samoan Hotspot Trail -- Multibeam bathymetry |
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Samoan Hotspot Trail -- Predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 2 -- Multibeam data merged with predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 2 -- Multibeam bathymetry |
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Samoan Hotspot Trail -- Tile 2 -- Predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 2 -- Residual bathymetry |
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Samoan Hotspot Trail -- Tile 3 -- Multibeam data merged with predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 3 -- Multibeam bathymetry |
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Samoan Hotspot Trail -- Tile 3 -- Predicted satellite bathymetry |
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Samoan Hotspot Trail -- Tile 3 -- Residual bathymetry |
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Brocher, T.M. (1985). On the age progression of the seamounts west of the Samoan Islands, SW Pacific. In: Investigations of the Northern Melanesian Borderland. Brocher, T.M. (Editors), Circum-Pacific Council for Energy and Mineral Resources, Houston. 3: 173-185. |
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Brocher, T.M. and Holmes, R. (1985). Tectonic and geochemical framework of the Northern Melanesian Borderland; an overview of the KK820316 Leg 2 objectives and results. In: Investigations of the northern Melanesian Borderland. Brocher, T.M. (Editors), Circum-Pacific Council for Energy and Mineral Resources, Houston. 3: 1-11. |
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Chaproniere, G.C.H. (1985). Late Tertiary and Quaternary foraminiferal biostratigraphy and paleobathymetry of cores and dredge samples from Cruise KK820316 Leg 2. In: Investigations of the northern Melanesian Borderland. Brocher, T.M. (Editors), Circum-Pacific Council for Energy and Mineral Resources, Houston. 3: 103-122. |
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Clouard, V. and Bonneville, A. (2001). Ages of seamounts, islands and plateaus on the Pacific plate. 1-42. |
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Duncan, R.A. (1985). Radiometric ages from volcanic rocks along the New Hebrides-Samoa Lineament. In: Investigations of the northern Melanesian Borderland. Brocher, T.M. (Editors), Circum-Pacific Council for Energy and Mineral Resources, Houston. 3: 67-76. |
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Hart, S.R. (2004). Collaborative research: The Samoan Hotspot, Past and Present. In: Collaborative research: The Samoan Hotspot, Past and Present. Woods Hole Oceanographic Institution, Woods Hole, MA. |
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Keating, B.H. (1987). Summary of radiometric ages from the Pacific. In: Intergovernmental Oceanographic Comission technical series. UNESCO. 32. |
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Sinton, J.M., Johnson, K.T.M. and Price, R.C. (1985). Petrology and geochemistry of volcanic rocks from the Northern Melanesian Borderland. In: Investigations of the northern Melanesian Borderland. Brocher, T.M. (Editors), Circum-Pacific Council for Energy and Mineral Resources, Houston. 3: 35-65. |
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Hart, S., Coetzee, M., Workman, R., Blusztajn, J., Johnson, K., Sinton, J., Steinberger, B. and Hawkins, J. (2004). Genesis of the Western Samoa seamount province: age, geochemical fingerprint and tectonics. Earth and Planetary Science Letters 227(1-2): 37-56. doi: 10.1016/j.epsl.2004.08.005. |
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| Depth |
Azimuth |
Area |
Length |
Width |
Elongation |
Contour |
Ellipse |
Irregularity |
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| m |
degrees |
km2 |
km |
km |
ratio |
km |
km |
ratio |
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| 1254 |
48.7 |
1834.3 |
55.7 |
47.8 |
1.165 |
209.2 |
152.5 |
1.372 |
| 1500 |
221.2 |
2237.0 |
58.8 |
52.5 |
1.119 |
194.7 |
168.1 |
1.158 |
| 1745 |
216.1 |
2523.2 |
61.2 |
55.8 |
1.098 |
209.1 |
178.4 |
1.172 |
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| 23 % Multibeam Coverage |
1.13 ± 0.03 |
1.23 ± 0.12 |
| 2455 m High |
| 1 Summit |
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