Waves, coastal boulder deposits and the importance of the pre-transport setting
Nott, Jonathan (2003) Waves, coastal boulder deposits and the importance of the pre-transport setting. Earth and Planetary Science Letters, 210 (1-2). pp. 269-276.
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The pre-transport environment of a coastal boulder along with its shape, size and density determines the height of wave required for it to be transported. Different forces act on sub-aerial boulders as opposed to submerged boulders when struck by a wave. Boulders derived from joint bounded blocks on shore platforms predominantly experience lift force and require a wave of greater height to be transported than boulders in other environments. No one equation is applicable to determine the height of palaeo-waves responsible for depositing a field or ridge of imbricated coastal boulders. A range of equations and their derivation is presented here which can be applied to the respective pre-transport environment of a boulder. Such an approach is necessary when attempting to reconstruct the frequency and magnitude of past coastal wave hazards and for differentiating between tsunami and storm wave deposited boulder fields.
|Item Type:||Article (Refereed Research - C1)|
|Keywords:||coastal boulder deposits; hydrodynamic equations; storm waves; tsunami; Western Australia|
|FoR Codes:||04 EARTH SCIENCES > 0406 Physical Geography and Environmental Geoscience > 040601 Geomorphology and Regolith and Landscape Evolution @ 33%|
04 EARTH SCIENCES > 0405 Oceanography > 040503 Physical Oceanography @ 34%
04 EARTH SCIENCES > 0406 Physical Geography and Environmental Geoscience > 040699 Physical Geography and Environmental Geoscience not elsewhere classified @ 33%
|SEO Codes:||96 ENVIRONMENT > 9699 Other Environment > 969902 Marine Oceanic Processes (excl. Climate Related) @ 51%|
96 ENVIRONMENT > 9611 Physical and Chemical Conditions of Water > 961104 Physical and Chemical Conditions of Water in Marine Environments @ 49%
|Deposited On:||11 Jun 2009 11:06|
|Last Modified:||18 Oct 2013 00:36|
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