Some fundamental problems in outcrop sequence stratigraphy |
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| Authors: | Xunlian Wang |
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| Institution: | (1) Department of Geology and Mineral Resources, China University of Geosciences, 100083 Beijing, China |
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| Abstract: | 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 outcmp. (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.
Project jointly supported by the SSER, the Ministry of Science and Technology of China, and the Ministry of Land and Natural
Resources of China. |
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| Keywords: | theoretical stratigraphy sequence stratigraphy sequence boundary optimizing chronostratigraphic boundaries |
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