| 21. | The basin is characterized by a large shallow tidal estuary, Lake Maracaibo, located near its center.
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| 22. | Kayak and canoe rentals, sales and tours on a tidal estuary that is ideal for birdwatching.
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| 23. | Most of the river is a tidal estuary.
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| 24. | It is formed in southern Wilmington, near the broadening of the Cape Fear into a tidal estuary.
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| 25. | Later, the Mersey Railway connected Birkenhead and Liverpool, with the world's first tunnel beneath a tidal estuary.
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| 26. | The Piscataqua River is a tidal estuary with a swift current, but forms a good natural harbor.
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| 27. | The river is a tidal estuary.
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| 28. | The refuge protects various kinds of habitat, including barrier beach, dune, tidal estuary, salt marsh, and rocky coastline.
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| 29. | New Zealand plovers are shorebirds and are usually found on sandy beaches and sandspits or feeding on tidal estuaries.
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| 30. | The county's lowest point is sea level, along the Hudson River, which in this region is a tidal estuary.
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