A DIVISION OF CONTINENTAL SEQUENCE STRATIGRAPHY AND THE IDENTIFICATION OF ITS INTERFACE WITH HIGH RESOLUTION CORE ANALYSES AND WELL-LOGGING

In a continental basin there are four types of parasequence with three patterns of overlappings, i. e. Ⅰ,Ⅱ typed aggradational parasequence set, aggressive parasequence set and regressive parasequence set I thereby the paper discussed the feasibility of the four-division plan for continental sequence stratigraphy, and proposed the terms of lacustrine dry system tract (LDST), lacustrine extend system tract (LEST), and lacustrine wrinkle system tract (LWST). It is summarized that sequence interfaces may be clarified into four types: regional angled unconformable contact, vocano-local unconformable contact, maximum exposural flushing surface of lacustrine wrinkle and regional onlapping unconformable contact, etc. Finally the paper suggested the followings may be considered as interfaces of parasequence: the bottom interface of oil-shale and organic-rich layer; the interface between the low-energy fine clastics and underlying calcareous concretion and slump structural layer, the rock facial plane characterized by a large scale abrupt increase of water depth I the top interface of a thick slump structural layer;and a thick muddy sedimental interface characterized by an abrupt color mutation.