Sedimentology of rocky shorelines: 3.Hydrodynamics of megaclast emplacement and transport on a shore platform, Oahu, Hawaii

Noormets, Riko; Crook, Keith A. W.; Felton, Elizabeth A.

doi:10.1016/s0037-0738(04)00235-0

Cited by 147 publications

(190 citation statements)

References 41 publications

Supporting

Mentioning

178

Contrasting

Unclassified

Order By: Relevance

“…Storm surges and tsunamis have immense erosive power and are capable of quarrying and transporting enormous blocks from the shoreface (which adds to their abrasive capability) to the inshore. These megaclasts and boulders are typically derived from the surface and edges of adjacent reefs or rocky platforms (when these are present), or from the upper seaward edge of the adjacent seacliffs; the quarrying of the these megaclasts from both the shore platform edge and surface is facilitated by partial detachment along joints and cracks in the limestone or basaltic bedrock by marine erosion processes (Noormets et al, 2002(Noormets et al, , 2004Richmond et al, 2011;Etienne et al, 2011). Storm-and tsunami-induced erosion, coupled with mass wasting, is, in fact, the main agent of change along volcanically-quiescent rocky shorelines of islands that are frequently impacted by extreme-wave events (e.g (2) Rapid incision of shore platforms, essentially within the intertidal zone and at the same mean sea level.…”

Section: Coastal Erosion During Extreme-wave Eventsmentioning

confidence: 99%

“…On rocky coasts, overwash from tsunami and storm surges typically result in supratidal deposits that include solitary coarse clasts, pockets and clusters of coarse clasts, thin sand sheets in topographic depressions, and incipient development of low ridges (Noormets et al, 2002(Noormets et al, , 2004Richmond et al, 2011). Deposits from large storm and/or swell waves are generally more confined to areas closer to the shoreline and typically correspond to prominent and multigenerational shore-parallel ridges of sediment and other positive relief features that mask the underlying topography and are regularly modified .…”

Section: Sediment Fluxes During Extreme-wave Eventsmentioning

confidence: 99%

See 1 more Smart Citation

Coastal evolution on volcanic oceanic islands: A complex interplay between volcanism, erosion, sedimentation, sea-level change and biogenic production

Ramalho¹,

Quartau

Trenhaile

et al. 2013

Earth-Science Reviews

153

147

View full text Add to dashboard Cite

The growth and decay of oceanic hotspot volcanoes are intrinsically related to a competition between volcanic construction and erosive destruction, and coastlines are at the forefront of such confrontation. In this paper, we review the several mechanisms that interact and contribute to the development of coastlines on oceanic island volcanoes, and how these processes evolve throughout the islands' lifetime. Volcanic constructional processes dominate during the emergent island and subaerial shield-building stages. During the emergent island stage, surtseyan activity prevails and hydroclastic and pyroclastic structures form; these structures are generally ephemeral because they can be rapidly obliterated by marine erosion. With the onset of the subaerial shield-building stage, coastal evolution is essentially characterized by rapid but intermittent lateral growth through the formation of lava deltas, largely expanding the coastlines until they, typically, reach their maximum extension. With the post-shield quiescence in volcanic activity, destructive processes gradually take over and coastlines retreat, adopting a more prominent profile; mass wasting and marine and fluvial erosion reshape the landscape and, if conditions are favorable, biogenic processes assume a prominent role. Posterosional volcanic activity may temporarily reverse the balance by renewing coastline expansion, but islands inexorably enter in a long battle for survival above sea level. Reef growth and/or uplift may also prolong the island's lifetime above the waves. The ultimate fate of most islands, however, is to be drowned through subsidence and/or truncation by marine erosion.Keywords complex, interplay, between, volcanism, erosion, sedimentation, sea, level, islands, change, coastal, biogenic, production, oceanic, evolution, volcanic, GeoQuest Disciplines Medicine and Health Sciences | Social and Behavioral Sciences Publication DetailsRamalho, R. S., Quartau, R., Trenhaile, A. S., Mitchell, N. C., Woodroffe, C. D. & Avila, S. P. (2013). Coastal evolution on volcanic oceanic islands: a complex interplay between volcanism, erosion, sedimentation, sealevel change and biogenic production. Earth-Science Reviews, 127 140-170. AbstractThe growth and decay of oceanic hotspot volcanoes are intrinsically related to a competition between volcanic construction and erosive destruction, and coastlines are at the forefront of such confrontation. In this paper, we review the several mechanisms that interact and contribute to the development of coastlines on oceanic island volcanoes, and how these processes evolve throughout the islands' lifetime. Volcanic constructional processes dominate during the emergent island and subaerial shield-building stages. During the emergent island stage, surtseyan activity prevails and hydroclastic and pyroclastic structures form; these structures are generally ephemeral because they can be rapidly obliterated by marine erosion. With the onset of the subaerial shield-building stage, coastal evolution is essentially ch...

show abstract

Section: Coastal Erosion During Extreme-wave Eventsmentioning

confidence: 99%

Section: Sediment Fluxes During Extreme-wave Eventsmentioning

confidence: 99%

Coastal evolution on volcanic oceanic islands: A complex interplay between volcanism, erosion, sedimentation, sea-level change and biogenic production

Ramalho¹,

Quartau

Trenhaile

et al. 2013

Earth-Science Reviews

153

147

View full text Add to dashboard Cite

show abstract

“…When compared to other published reports, these Hawaiian storms and tsunami have transport parameters in the lower range of published values. Noormets et al (2002Noormets et al ( , 2004 published studies of large boulders at Shark's Cove on the North Shore of Oahu. The field studies were augmented by the laboratory study of a set of aerial photographs.…”

Section: Boulders Depositsmentioning

confidence: 99%

“…The winter swell of 2006 provided an opportunity to test whether giant winter surf could move boulders and mega-boulders. The wave climate in Hawaii includes swell heights that can reach a maximum of ca 14 m or face heights of about 24 m (Noormets, et al (2004). During the winter of 2006, the mega-boulders at Shark's Cove were photographed.…”

Section: Boulders Depositsmentioning

confidence: 99%

Tsunami Deposit Research: Fidelity of the Tsunami Record, Ephemeral Nature, Tsunami Deposits Characteristics, Remobilization of Sediment by Later Waves, and Boulder Movements

Barbara¹,

Keating²,

Helsley³

et al. 2011

The Tsunami Threat - Research and Technology

View full text Add to dashboard Cite

“…For example, in addition to fine sediments, there are numerous historically-documented reports of limestone megaclasts (e.g. Noormets et al, 2004), fish (e.g. Lander et al, 2003) and large organic debris including mature trees (e.g.…”

Section: Brief Communicationmentioning

confidence: 99%

Brief Communication: Cetaceans and tsunamis – whatever remains, however improbable, must be the truth?

Goff

Chagué‐Goff

2009

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. The composition of tsunami deposits is variable and governed by source material. Many unusual items have been recorded from tsunami deposits. For example, during the 2004 Indian Ocean Tsunami, a dolphin was reported to have been transported 1400 m inland, a shark was found in a hotel swimming pool, and sea turtles were stranded kilometers inland. Reports and papers from early settlers and explorers have often highlighted similar unusual finds. We briefly discuss an example from New Zealand where intact cetacean skeletons were found elevated on land adjacent to the coast. The validity of this find as evidence for tsunami emplacement is considered. It is also noted that such old reports should be treated with respect and re-evaluated in the light of more recent findings. Brief communicationSedimentological, biological and geochemical evidence from historic tsunamis provides valuable information for researchers attempting to identify records of prehistoric events.

show abstract

Sedimentology of rocky shorelines: 3.Hydrodynamics of megaclast emplacement and transport on a shore platform, Oahu, Hawaii

Cited by 147 publications

References 41 publications

Coastal evolution on volcanic oceanic islands: A complex interplay between volcanism, erosion, sedimentation, sea-level change and biogenic production

Coastal evolution on volcanic oceanic islands: A complex interplay between volcanism, erosion, sedimentation, sea-level change and biogenic production

Tsunami Deposit Research: Fidelity of the Tsunami Record, Ephemeral Nature, Tsunami Deposits Characteristics, Remobilization of Sediment by Later Waves, and Boulder Movements

Brief Communication: Cetaceans and tsunamis – whatever remains, however improbable, must be the truth?

Contact Info

Product

Resources

About