Stability of submerged slopes on the flanks of the Hawaiian Islands, a simplified approach

Lee, Homa J.; Torresan, Michael E.; McArthur, William G.

doi:10.2172/90387

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Assessment Of Cohesions Of Steep Deposits1

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2021

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Cited by 6 publications

(1 citation statement)

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“…A bulk density of 1.0 g/cm 3 was used for (ρ s -ρ w ) representing sand in water (Hamilton & Bachman, 1982;Hamilton et al, 1956). We used 25°-40° for internal friction angle Φ typical of volcaniclastic sands and calcareous ooze (Boldini et al, 2009;Lee et al, 1994).…”

Section: Assessment Of Cohesions Of Steep Depositsmentioning

confidence: 99%

Landslides in the Upper Submarine Slopes of Volcanic Islands: The Central Azores

Chang

Mitchell

Quartau

2021

Geochem Geophys Geosyst

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Section: Assessment Of Cohesions Of Steep Depositsmentioning

confidence: 99%

Landslides in the Upper Submarine Slopes of Volcanic Islands: The Central Azores

Chang

Mitchell

Quartau

2021

Geochem Geophys Geosyst

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Cone morphologies associated with shallow marine eruptions: east Pico Island, Azores

et al. 2012

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Eruptions in shallow water typically produce cones of volcaniclastic material. In order to identify any systematic effects of water depth and other environmental parameters on cone morphology, we have measured the heights and widths of cones in multibeam echo--sounder data from a submarine ridge extending southeast from Pico Island, Azores. XRF analyses of dredged samples show that lavas here vary compositionally from alkali basalt, to trachybasalt and trachyandesite. Cones in the deeper water are generally steep--sided with upper flanks close to 30˚, the dip of talus at the angle of repose. However, height/width ratios of cones vary more in shallow water (200-400 m summit depth) with extreme values below 0.1; while some shallow--water cones are steep--sided as in deep water, others are much flatter. Three such cones lie on a bench at 300 m depth immediately east of Pico Island and have flank slopes of only 10˚-20˚. We speculate that exceptionally shallow cone slopes here were produced by forced spreading of the erupting columns on reaching the water-air density barrier.

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Mass-transport deposits and reservoir quality of Upper Cretaceous Chalk within the German Central Graben, North Sea

Arfai

Lutz

Franke

et al. 2015

Int J Earth Sci (Geol Rundsch)

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Stability of submerged slopes on the flanks of the Hawaiian Islands, a simplified approach

Cited by 6 publications

References 22 publications

Landslides in the Upper Submarine Slopes of Volcanic Islands: The Central Azores

Landslides in the Upper Submarine Slopes of Volcanic Islands: The Central Azores

Cone morphologies associated with shallow marine eruptions: east Pico Island, Azores

Mass-transport deposits and reservoir quality of Upper Cretaceous Chalk within the German Central Graben, North Sea

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