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| HISTOICAL GEOLOGY & STRATIGRAPHY | |
| 摘 要： | 20 0 4 2 76 3AnYongsheng (QinghaiInstituteofGeologicalSurvey ,Xining ,Qinghai)Char acteristicsofFenghuoshanGroup’sMaterialandItsAgeDiscussion (NorthwesternGeolo gy,ISSN 1 0 0 9- 6 2 4 8,CN 6 1 - 1 1 4 9/P ,37( 1 ) ,2 0 0 4 ,p .6 3- 6 8,6illus.,5refs.)Keywords: UpperCretaceous,QinghaiProvinceTheageofFenghuoshanGroupisade batedfocus,therearetwodifferentstand pointsonit.TheoneregardsthatitbelongstoCretaceousperiod ,andtheotherthinkthatitbelongstoEogeneperiod .Accordingtogeo logical… |
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