Testing the hypothesis for tsunami boulder deposition from suspension

Goff, James; Weiss, Robert; Courtney, Claire; Dominey‐Howes, Dale

doi:10.1016/j.margeo.2010.08.003

Cited by 31 publications

(12 citation statements)

References 24 publications

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“…These types of transport were directly surveyed by Mastronuzzi and Sansò (2004) for boulders moved by a four day stormhundred-thousand of waves-occurred in Adriatic Sea on January 2003 or hypothesized by Hall et al (2006Hall et al ( , 2008 and by Hansom et al (2008) for the terrible storms impacting on the high British cliffs facing on the North Sea. Despite the conclusions reached by Goff et al (2010), the general features of the boulders, the absence of significant smaller fragments, the presence of a delicate and continuous band of algal rim and of sparse bio-concretions, all together seem to suggest a transport characterised by a single movement, eluding the possibility that boulders could have been rounded by the abrasion on the surf bench. Experimental data indicated that the maximum pressure exerted by an impacting wave is concentrated at the breaking Table 4.…”

Section: Discussionmentioning

confidence: 80%

“…Matter of debate could be the type of transport. In a recent paper, Goff et al (2010) examined the physics of the boulder transport and concluded that the suspension is unrealistic, whereas the entrainment and/or the saltation are more probable. These types of transport were directly surveyed by Mastronuzzi and Sansò (2004) for boulders moved by a four day stormhundred-thousand of waves-occurred in Adriatic Sea on January 2003 or hypothesized by Hall et al (2006Hall et al ( , 2008 and by Hansom et al (2008) for the terrible storms impacting on the high British cliffs facing on the North Sea.…”

Section: Discussionmentioning

confidence: 99%

“…The reply to this scientific question was the increase of the number of papers examining the nature of these landforms/sediments, focusing their attention on the wave forces necessary to detach, transport and deposit boulders of different size and weight (e.g. Nott, 1997Nott, , 2003Noormets et al, 2004;Scheffers and Kelletat, 2005;Kelletat et al, 2006Mastronuzzi et al, 2006;Scheffers, 2006Scheffers, , 2008Goto et al, 2007Goto et al, , 2010bScicchitano et al, 2007;Imamura et al, 2008;Kelletat, 2008;Benner et al, 2010;Goff et al, 2010;Regnauld et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Terrestrial Laser Scanner techniques in the assessment of tsunami impact on the Maddalena peninsula (south-eastern Sicily, Italy)

et al. 2012

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The coastline of the Maddalena peninsula (south-eastern Sicily, Italy) is characterised by the occurrence of a boulder field associated to an extended soil stripping area and by a gravel/sandy berm. The accumulation of the boulders has been mostly correlated to the impact of the December 28, 1908 tsunami wave. The use of Terrestrial Laser Scanner survey techniques, associated to Differential Global Position System determinations, permits to obtain new data for the assessment of tsunami impact on this coastal area. The computing of the surveyed data using the most recent equations is a useful tool in order to estimate the theoretic inundation limit and to reconstruct its variability in function of the boulders size and of the coastal topography. Moreover, the entire new data set allows to confirm that the hypothesis of the tsunami impact is the most reasonable to explain the occurrence of boulders weighing up to 50 tons on the Maddalena peninsula.

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Section: Discussionmentioning

confidence: 80%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Terrestrial Laser Scanner techniques in the assessment of tsunami impact on the Maddalena peninsula (south-eastern Sicily, Italy)

et al. 2012

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“…Goto et al, 2007;Scheffers, 2008;Goff et al, 2010). On the seafloor off Sumatra, the movement of boulders several meters in diameter, in water depths down to 25 m, has been described and modeled by Paris et al (2010).…”

Section: Identification Of Offshore Tsunami Impactmentioning

confidence: 99%

Sediment distribution on the inner continental shelf off Khao Lak (Thailand) after the 2004 Indian Ocean tsunami

et al. 2012

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The coastline of Khao Lak (Thailand) was heavily damaged by the 2004 Indian Ocean tsunami. Onshore tsunami deposits and satellite images, which show large amounts of sediment transported offshore, indicate that the seafloor was impacted by tsunami run-up and backwash. In this study, high-resolution maps of sediment distribution patterns and the geological development of the seafloor are presented. These maps are based on multibeam, side-scan sonar and seismic profiling surveys offshore Khao Lak. Paleoreefs, with associated boulder fields and sandy sediment dominate the inner continental shelf. Patches of fine-grained (silt to fine sand) sediments exist in water depths of less than 15 m. The sediment distribution pattern is stable between 2008 and 2010, apart from small shifts regarding the boundaries of the fine-grained sediment patches. In one sediment core and several grab samples an event layer was documented, situated below a cover of modern sediments which is only a few cm thick. The event-layer is traced down to 18 m water depth. It consists mostly of sand and contains compounds of terrigenous origin. It is interpreted as a 2004 Indian Ocean tsunami deposit. However, over large areas of the study-site, the impact of the tsunami is hardly identifiable by seafloor morphology or sediment distribution.

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“…The second has focused on sand sheets found in coastal embayments (Switzer et al ., 2005; 2006; Switzer and Jones, 2008a) that appear to be the result of much smaller, less frequent tsunamis. Despite the potential difference in frequency magnitudes, debate on the genesis of coastal overwash sand sheets found in coastal lagoons or boulders and coarse deposits on rocky coastlines and cliff tops (Felton and Crook, 2003; Switzer et al ., 2005; 2006; Dominey‐Howes et al ., 2006; Switzer and Jones, 2008a; Hutchinson and Attenbrow, 2009; Goff and Dominey‐Howes, 2010; Goff et al ., 2010a; 2010b; Switzer and Burston, 2010) continues and their presence in the landscape is indicative of high‐energy marine events along this coast.…”

Section: Introductionmentioning

confidence: 92%

On the Possible Origins of an Unusual (Mid to Late Holocene) Coastal Deposit, Old Punt Bay, South-East Australia

Switzer

Mamo

Dominey‐Howes

et al. 2011

Geographical Research

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An unusual coarse, shelly sedimentary unit is found elevated above present mean sea level in a sheltered pocket embayment at Old Punt Bay in south‐eastern Australia. The coarse sediments, diverse microfauna, and large shelly macrofauna of mixed affinity suggest that the deposit is the result of high‐energy deposition. The deposit was previously thought to have been deposited 1000–1300 cal bp based on one shell dated using 14C and amino acid racemisation. However, additional 14C dating indicates a likely age of ∼2500 cal bp. Regardless of age constraints, the presence of rock‐encrusting oyster shells and large articulated bivalves, suggests that the depositional event must have been capable of removing and transporting coarse sediments (rock clasts), bivalves, and oysters shells from a variety of seaward environments and depositing them with little abrasion, something storm waves are unlikely to do. The deposit may be tsunamigenic. If a tsunami origin is accepted, the new dating results indicate that it is possibly coeval with a tsunami event previously reported to have affected several other sites along the coast of New South Wales at c. 2900 cal bp. Consequently, this deposit provides evidence for the event at a new site and importantly, a tighter constraint on the likely date of the events occurrence. It further adds weight to the developing catalogue of palaeotsunamis that may have affected the south‐eastern coast of Australia. Regardless of the deposit's origins, if viewed from a coastal planning perspective, this deposit indicates that this part of the coast has experienced large‐scale overwash events in the past that if repeated, would be catastrophic. There are serious implications for risk management.

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Testing the hypothesis for tsunami boulder deposition from suspension

Cited by 31 publications

References 24 publications

Terrestrial Laser Scanner techniques in the assessment of tsunami impact on the Maddalena peninsula (south-eastern Sicily, Italy)

Terrestrial Laser Scanner techniques in the assessment of tsunami impact on the Maddalena peninsula (south-eastern Sicily, Italy)

Sediment distribution on the inner continental shelf off Khao Lak (Thailand) after the 2004 Indian Ocean tsunami

On the Possible Origins of an Unusual (Mid to Late Holocene) Coastal Deposit, Old Punt Bay, South-East Australia

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