• Webster's Revised Unabridged Dictionary
    • n Interstratification (Geol) Stratification among or between other layers or strata; also, that which is interstratified.
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Century Dictionary and Cyclopedia
    • n interstratification The state of being interstratified, or of lying between other strata; in geology, the condition of a bed, stratum, or member of an aqueous deposit, with reference to the overlying and underlying beds.
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Chambers's Twentieth Century Dictionary
    • n Interstratification in-tėr-strat-i-fi-kā′shun the state of lying between other strata
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In literature:

It presents, like the upper clay, frequent interstratification with well-bedded deposits of sand and gravel.
"The History of the European Fauna" by R. F. Scharff