%0 Journal Article %T APETROGRAPHICSTUDYOFHEAVYMINERALSOFWISCONSINIGNEOUSROCKS,U.S.A %J µØÖÊѧ±¨ %D 1932 %X Theuseoftheheavymineralsinsedimentaryrocksasameansforcorrelationofstratigraphicproblemisbecomingmoreandmorewidespreadinrecentyears,especiallyinEnglandandUnitedStates.Wheretherockformationsarescantyinfossilsorcannotbecorrelatedbyfossilsalone,thestudy %U http://www.geojournals.cn/dzxb/ch/reader/view_abstract.aspx?file_no=19320438&flag=1