NCEA Level 3 Geography Practice Questions - New Zealand NCEA Level 3 Geography Exam

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In coastal sand dune ecosystems such as Muriwai Beach, what process primarily causes the formation of blowout depressions?

Aeolian wind deflation localized where dune vegetation has been breached or disturbed Sub-surface groundwater sapping that collapses foredunes into coastal lagoons Tidal wave inundation that gouges out deep trenches during spring high tides Chemical weathering of quartz sand grains by salt spray and rainwater

Correct Answer:

Aeolian wind deflation localized where dune vegetation has been breached or disturbed

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