Page "Plum Island (Massachusetts)" Paragraph 21
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Wikipedia
Plum Island Beach is a gently sloping shelf extending some distance out to sea.
As result of the slope tidal flow does not reach very far horizontally, while breakers are small and close to shore.
Boats can easily be launched from or landed on the beach.
The shelf causes strong undertow currents.
During severe storms the beach is inundated and the breakers strike the dune line.
A number of ships have been wrecked in the shallow waters off Plum Island Beach.
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