On the basis of the field investigation and indoor integrated study,the authors present various evidence of the paleo-karst land - forms on top of the Maokou Formation,including rugged ancient erosion sur.
作者通过野外实地考察和室内综合研究首次系统地厘定上扬子西部茅口组顶部的古喀斯特地貌,其形态多种多样,包括起伏不平的古剥蚀面、溶蚀洼地、溶斗、峰林、溶丘、洞穴以及洞穴充填物和古剥蚀面上红壤土。
In this work reported are cascadites discovered in a volcanic neck at Heilongtan of Harqin in Inner Mongolia, whose K-Ar isotopic age is 124 Ma.
本文报道的是在内蒙古喀喇沁黑龙潭火山颈中发现的橄辉云煌岩,其K-Ar同位素年龄为124 Ma。
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