English: Jetties made of rock were built to prevent sand erosion. Currents from the Atlantic Ocean push sand northwards; jetties such as this one attempt to block the erosion of sand to keep beaches from washing away.
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{{Information |Description ={{en|1=Jetties made of rock were built to prevent sand erosion. Currents from the Atlantic Ocean push sand northwards; jetties such as this one attempt to block the erosion of sand to keep beaches from washing away.}} |Sourc