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Is the coast clear? Not in many beachfront areas
![Large rock revetment in the intertidal zone of a sandy beach in Santa Barbara County, California.](/news/mmg/media/images/242562-SBC_RevetmentSantaBarbaraCountyBeach_f.jpg)
Large rock revetment in the intertidal zone of a sandy beach in Santa Barbara County, California.
Credit: Eduardo Jaramillo, Universidad Austral de Chile
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![Seawall in the intertidal zone of a sandy beach in Santa Barbara County, California.](/news/mmg/media/images/242562-SBC_seawallSummerland_CA_f.jpg)
Seawall in the intertidal zone of a sandy beach in Santa Barbara County, California.
Credit: Jenny Dugan, UCSB
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![Bulkhead and dock structure in a salt marsh in coastal Georgia.](/news/mmg/media/images/242562-GCE Photo bulkhead-1_f.jpg)
Bulkhead and dock structure in a salt marsh in coastal Georgia.
Credit: Alyssa Gehman, UGA
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![Salt marsh sunset at Sapelo Island, Georgia. Such sites are studied for coastal armoring effects.](/news/mmg/media/images/242562-GCE Photo marsh sunset-1_f.jpg)
Salt marsh sunset at Sapelo Island, Georgia. Such sites are studied for coastal armoring effects.
Credit: Wade Sheldon, UGA
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![Artificial reefs from concrete blocks, called oyster castles, can decrease salt marsh erosion.](/news/mmg/media/images/242562-Oyster Castle 1_f.jpg)
Artificial reefs from concrete blocks, called oyster castles, can decrease salt marsh erosion.
Credit: Bo Lusk, TNC
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![Oyster castles provide substrate for artificial reefs that reduce wave effects onshore.](/news/mmg/media/images/242562-Oyster Castle 2_f.jpg)
Oyster castles provide substrate for artificial reefs that reduce wave effects onshore.
Credit: Bo Lusk, TNC
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