Valley Fill Aquifers: The most productive surficial aquifers in the Northeast are the result of outwash streams incising new valleys or widening existing valleys, and then leaving behind sand and gravel sediments.
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Formation of Valley Fill Aquifers |
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Valley Fill Aquifers: The most productive surficial aquifers in the Northeast are the result of outwash streams incising new valleys or widening existing valleys, and then leaving behind sand and gravel sediments.
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