Hardpan

What is Hardpan?

Hardpan definition and meaning on Dictionary terms:
noun
any layer of firm detrital matter, as of clay, underlying soft soil.Compare caliche, duricrust.
hard, unbroken ground.
the fundamental or basic aspect of anything; solid foundation; underlying reality: the hardpan of mathematical theory.

 

reference: www.dictionary.com/browse/hardpan

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