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地质学报 1932

APETROGRAPHICSTUDYOFHEAVYMINERALSOFWISCONSINIGNEOUSROCKS,U.S.A

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Abstract:

Theuseoftheheavymineralsinsedimentaryrocksasameansforcorrelationofstratigraphicproblemisbecomingmoreandmorewidespreadinrecentyears,especiallyinEnglandandUnitedStates.Wheretherockformationsarescantyinfossilsorcannotbecorrelatedbyfossilsalone,thestudy

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