The sandstone body of Yanghugou formation deposited mostly from tidal flat and lagoon.
上古生界石炭系羊虎沟组砂体以潮坪、泻湖沉积为主；
Coastal delta, tidal flat, Marine marsh, mangrove wetland, lagoon and sand beach are the main types of the coastal wetlands of China.
我国的滨海湿地主要包括三角洲湿地、滨岸沼泽、淤泥质海岸、红树林沼泽、海岸潟湖、砂质海岸湿地等几种主要湿地类型。
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