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sangshuania shi zhen he zao lei huan shi yi ji hua shi ?
Author(s): 
Pages: 105-114
Year: Issue:  1
Journal: Acta Micropalaeontologica Sinica

Keyword:  metazoantrace fossilsmegafossilsimpressionsamino acid racemization;
Abstract: 本文论述了产于蓟县高于庄组的盘绕带状宏观化石SangshuaniaDu,1986应是后生动物遗迹化石,其依据是:1)化石产于岩层内,而非层面上,有三维空间分布。2)化石多见于风化层内,许多风化产物使印痕轮廓清晰,而接近新鲜岩层则反差微弱。3)化石体系痕迹而非碳质膜,有机质成分也低,多为左型氨基酸,未形成对映异构体,受地表风化影响严重。4)化石体盘绕状,以顺时针展开为主,是动物行为习性的反映。5)局部见有横节是蠕动的遗迹,为此建新组合遗迹种Helminthoidichnitessangshuanensis,14亿年动物遗迹的确认,为研究早期后生动物的发生和发展提供了新的信息。
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