浅谈在1∶5万区域地质调查中有关层序地层野外调查的若干问题

SEVERAL PROBLEMS CONCERNING THE FIELD SURVEYS OF SEQUENCE STRATIGRAPHY IN 1∶50 000 REGIONAL SURVEYS

针对在１∶５万区调中层序地层学的野外调查方法，有关副层序、不整合面、饥饿段及最大海泛期沉积的特征和识别标志，区域地层格架的建立等问题进行了详细讨论。进一步阐明了层序地层与岩石地层关系及其对填图的指导作用，并提出了层序地层学的图面表达方式和内容。

This paper discusses in detail the field survey method of sequence stratigraphy, the sedimentary features and criteria for recognition of subsequences, unconformity, starved intervals and maximum and the establishment of the regional stratigraphical framework marine flooding surface in regard to the 1∶50 000 regional surveys, and further expounds the relationships of sequence stratigraphy to lithostratigraphy and its guiding role in mapping. Besides, the expression form and contents of the map face of sequence stratigraphy are also proposed in the paper.