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地质学报 1930
NOTEONTHECOMPOSITIONOFTHENIANGTZEKUANTUFAAbstract: InconnectionwithastudyrecentlymadeofthefamoustufafromNiangtzckuan,Dr.Barbouraskedmetodeterminebyanalysistherelativeamountsofsolubleandinsolublemattersoastofindoutwhatproportionofthedepositisduetodirectprecipitationofmineralmatterinsolutionandwhatamountisclasticmaterialincorporatedinthegrowingdeposit.
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