| 21. | Beyond the high tide mark, if the beach is low-lying, the wind can form rolling hills of sand dunes.
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| 22. | In or about 1778, Thomas Curtis of Breage sank a shaft on the rocks below the high tide mark.
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| 23. | Authorities warned the population that the risk of more flooding remained high, particularly at the next high-tide mark Thursday evening.
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| 24. | Just next door, a home will be elevated even higher than theirs _ to 15 feet above the high-tide mark.
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| 25. | This 300-year-old seawall effectively kept Pondicherry's historic center dry even though tsunami waves drove water above the normal high-tide mark.
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| 26. | Grey plover, dunlin, brent geese rely heavily on eelgrass ( " Zostera " ), which grows below the high tide mark.
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| 27. | It grows in coastal strand, just above the high tide mark, and is widely cultivated as an ornamental throughout South America.
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| 28. | Tides are likely to rise significantly above the normal high tide mark with very dangerous flooding, damaging waves and strong currents.
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| 29. | On Bay Farm Island, ribbed horse mussels, natives of the Atlantic, burrow into the mud between the low and high tide marks.
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| 30. | Owing to the large tidal range in the Bristol Channel, the low tide mark in Weston Bay is about from the seafront.
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