中文摘要：

依据沉积学及遗迹学特征,豫西寒武系第二、三统馒头组共识别出固底遗迹化石11属15种,包括抓痕、爬痕类和潜穴类遗迹化石。节肢动物抓痕、爬痕类固底遗迹化石形成在沉积-水界面很浅处,保存为极为清晰、完整、精细的附肢痕迹,多形成于细粒的泥岩或粉砂质泥岩层面上,部分保存为上覆粗粒沉积物的底面铸型;潜穴类固底遗迹化石不发育外壁,以水平或近水平分布为主,保存有清晰的潜穴形态,潜穴表面发育精美的纹饰,充填物与围岩反差较大,被动充填上覆的粗粒沉积物或者聚集海底迂回的砂粒得以保存。发育遗迹化石的固底底质主要由沉积物长期或间歇性暴露和低的沉积物混合程度所致。

英文摘要：

According to the characteristics of sedimentology and ichnology,11 genera and 15 species of firm-ground trace fossils including burrows and repichnia have been identified in the Mantou Formation of Cambrian Series 2and 3,western Henan.The firm-ground repichnia were originally emplaced on or near the sediment-water interface（SWI）and usually formed on the surface of mudstone or silty mudstone,part of them were preserved on soles of overlying coarser sediments;the firm-ground burrows were characterized by sharp,often scratch-marked boundaries,unlined,passively filled with overlying coarser sediments or the sediments bypassing the bottom that contrast markedly with surrounding sediments. Firmground substrates with trace fossils may have resulted from prolonged or intermittent subaerial exposure of sediments and low degree of sediment mixing.