Rannavall (vananenud termin randvall ehk randrõõne) on tormi(de) poolt mererannale heidetud klibust ning veeristest koosnev piklik positiivne pinnavorm.
Rannavallid moodustuvad suuremate tormide käigus. Nende moodustumine ei ole mitte pidev, vaid hüppeline.
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