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地质学报 1935

THEOCCURRENCEOFENDOCARPSOFCELTISBARBOURIATCHOUKOUTIEN

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Abstract:

Theoccurrenceoffossilplantsincavedepositsisrelativelyrareduetothefactthatnoneofthehigherplants,whosestructuresalonearereadilypre-servable,occupyacavehabitat.Unlikemanyspeciesofmammals,especiallycarnivores,rodentsandmanhimself,higherplantsrequireasituationwheresunlightisaregularfactorintheenvironment.Afurtherdisadvantagefrom

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