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地质学报 1949

OrdovicianTrilobitesfromKaipingBasin,Hopei

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Abstract:

I.INTRODUCTIONThroughthestudyoftheOrdovicianstratigraphyandpalaeontologyofNChinamadebyA.W.Grabau,Y.C.SunandF.F.Mathieu,majorstratigraphicsubdivisionswereestablished.In1922,GrabaumadeanextensivestudyoftheOrdovicianfossilsofNChina,chieflycephalopodsfromtheMachiakoulimestone.In1935,SunpublishedamonographOnthe

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