Photos: Spectacular saltwater marshes of the Eastern US
When you purchase through link on our site , we may earn an affiliate commission . Here ’s how it work . The extensive estuarine seawater marshes of easterly North America are large , flat , grassy areas that are flooded daily by the semidiurnal tide of the Atlantic Ocean . Most areas experience two high tides and two abject tides each twenty-four hours , but when the high and crushed tides are about the same height , the pattern is known as semidurnal tide ....