GEOMORPHOLOGICAL AND SEQUENCE STRATIGRAPHIC VARIABILITY IN WAVE-DOMINATED, SHOREFACE-SHELF PARASEQUENCES
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dc.contributor.author | Hampson G.J. | |
dc.contributor.author | Storms J.E.A. | |
dc.date.accessioned | 2022-02-14T01:54:13Z | |
dc.date.available | 2022-02-14T01:54:13Z | |
dc.date.issued | 2003 | |
dc.identifier | https://elibrary.ru/item.asp?id=5148815 | |
dc.identifier.citation | Sedimentology, 2003, 50, 4, 667-701 | |
dc.identifier.issn | 0037-0746 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/35296 | |
dc.description.abstract | Physical stratigraphy within shoreface-shelf parasequences contains a detailed, but virtually unstudied, record of shallow-marine processes over a range of historical and geological timescales. Using high-quality outcrop data sets, it is possible to reconstruct ancient shoreface-shelf morphology from clinoform surfaces, and to track the evolving morphology of the ancient shoreface-shelf. Our results suggest that shoreface-shelf morphology varied considerably in response to processes that operate over a range of timescales. (1) Individual clinoform surfaces form as a result of enhanced wave scour and/or sediment starvation, which may be driven by minor fluctuations in relative sea level, sediment supply and/or wave climate over short timescales (101 -103 years). These external controls cannot be distinguished in vertical facies successions, but may potentially be differentiated by the resulting clinoform geometries. (2) Clinoform geometry and distribution changes systematically within a single parasequence, reflecting the cycle in sea level and/or sediment supply that produced the parasequence (102 -105 years). These changes record steepening of the shoreface-shelf profile during early progradation and maintenance of a relatively uniform profile during late progradation. Modern shorefaces are not representative of this stratigraphic variability. (3) Clinoform geometries vary greatly between different parasequences as a result of variations in parasequence stacking pattern and relict shelf morphology during shoreface progradation (105 -108 years). These controls determine the external dimensions of the parasequence. | |
dc.subject | CLINOFORM | |
dc.subject | FACIES MODEL | |
dc.subject | PARASEQUENCE | |
dc.subject | SHELF | |
dc.subject | SHOREFACE | |
dc.subject | SHORELINE TRAJECTORY | |
dc.title | GEOMORPHOLOGICAL AND SEQUENCE STRATIGRAPHIC VARIABILITY IN WAVE-DOMINATED, SHOREFACE-SHELF PARASEQUENCES | |
dc.type | Статья |
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