The Genesis and Significance of Glossifungites Ichnofacies at the Upper Member of Hezhou Formation of Lower Carboniferous, Northern Chao County, Anhui，
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摘要: 安徽巢县凤凰山剖面和州组上段生物扰动灰岩含丰富的遗迹化石Thalassinoides sp,属于Glossifungites遗迹相,它发育在没有完全石化的间断面上,反映了一种潮间带潮坪的沉积环境。Glossifungites遗迹相的发现,在地层学上证实了巢县以北和州组与黄龙组之间为间断接触,缺失或只存在一部分相当于巢县以南普遍存在的老虎洞组白云岩时代的地层。Abstract: The bioturbate limestone at the upper member of Hezhou Formation of Lower Carboniferous in north-ern Chao County w'as caused by Tlralassinoides sp. which produced at the semiconsolidated, but not fullylithified discontinuity surfaces. It could be attributed to Glossifungites ichnofacies which was formed in theintertidal flat environment. The features of carbonate microfacies and chemical components of the fills in the burrow systems differfrom that of the host rock. The fotmter is finely crystaline limestone mainly with crinoidal debris and containshigher clay minerals and dolomite than that of the latter. The latter is biomicrite bearing foraminifer,fusulina, molluscan and crinoidal debris. These differences imply that they were not formed in the same timeand environment. The fills were piped in the burrow systems in the next transgression after the halt of deposi-tron. The occurrence of Glossifungites ichnofacies at the uppetirtost surface of Hezhou Formation could pro-vide a new important stratigraphic information for interpreting the lacking of Laohudong Formation be-tween Huanglong Formation of Upper Carboniferous and Hezhou Formation of Lower Carboniferous herewhich prevails in southern Chao County.
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