MadSci Network: Earth Sciences

Subject: What causes some tides to be 'plus tides' or 'minus tides?'

Date: Fri Apr 5 16:56:25 2002
Posted by Patrick
Grade level: 10-12 School: Linn-Benton Community College
City: Albany State/Province: Oregon Country: USA
Area of science: Earth Sciences
ID: 1018043785.Es

Occessionally we have minus tides on the Oregon coastline that open wide 
expanses of beach, and allow wonderful clamming and beachcombing. I have not 
been able to get a good answer on why such regular occurrences as tides are so 
irregular on their levels.

Re: What causes some tides to be 'plus tides' or 'minus tides?'

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