摘要
Some fundamental problems in outcrop sequence stratigraphy are discussed, and the following ideas are obtained: (i) Detailed sedimentary facies analysis and study on stacking pattern of parasequences, careful and accurate study of biostratigraphy, and stratigraphical correlation of different facies areas are the essential conditions for proper identification of sequences. (ii) The first flooding surface may be an ideal sequence boundary in outcrop sequence stratigraphy, where the most distinct palaeontological and sedimentary changes take place and make the surface readily recognizable in outcrop. (iii) The distribution in space, specially in different facies belts, is regarded as an important criterion for defining and recognizing the various orders of sequences. The third-order sequence is probably global in nature , which may be discerned in various depositional facies belts at least on one continental margin, and can be correlated over long distances, sometimes worldwide. (iv) The first flooding surface may be used as a useful reference marker in optimizing chronostratigraphic boundaries.
Some fundamental problems in outcrop sequence stratigraphy are discussed, and the following ideas are obtained: (i) Detailed sedimentary facies analysis and study on stacking pattern of parasequences, careful and accurate study of biostratigraphy, and stratigraphical correlation of different facies areas are the essential conditions for proper identification of sequences. (ii) The first flooding surface may be an ideal sequence boundary in outcrop sequence stratigraphy, where the most distinct palaeontological and sedimentary changes take place and make the surface readily recognizable in outcrop. (iii) The distribution in space, specially in different facies belts, is regarded as an important criterion for defining and recognizing the various orders of sequences. The third-order sequence is probably global in nature , which may be discerned in various depositional facies belts at least on one continental margin, and can be correlated over long distances, sometimes worldwide. (iv) The first flooding
基金
Project jointly supported by the SSER, the Ministry of Science and Technology of China, and the Ministry of Land and Natural Resources of China.
