Publication Date:
2010-08-14
Description:
Cyclic sedimentary deposits link stratigraphic sequences that are now geographically distant but were once part of the same depositional environment. Some of these sequences occur at periods of 2 to 20 million years, and eustatic sea-level variations or regional tectonic events are likely causes of their formation. Using numerical modeling, we demonstrate that small-scale mantle convection can also cause the development of stratigraphic sequences through recurrent local and regional vertical surface movements. Small-scale convection-driven stratigraphic sequences occur at periods of 2 to 20 million years and correlate only at distances up to a few hundred kilometers. These results suggest that previous sequence stratigraphic analyses may contain erroneous conclusions regarding eustatic sea-level variations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Petersen, K D -- Nielsen, S B -- Clausen, O R -- Stephenson, R -- Gerya, T -- New York, N.Y. -- Science. 2010 Aug 13;329(5993):827-30. doi: 10.1126/science.1190115.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Earth Science, Aarhus University, DK-8000 Aarhus C, Denmark. kenni@geo.au.dk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20705857" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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