Document Detail


Increased sedimentation rates and grain sizes 2-4 Myr ago due to the influence of climate change on erosion rates.
MedLine Citation:
PMID:  11309607     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Around the globe, and in a variety of settings including active and inactive mountain belts, increases in sedimentation rates as well as in grain sizes of sediments were recorded at approximately 2-4 Myr ago, implying increased erosion rates. A change in climate represents the only process that is globally synchronous and can potentially account for the widespread increase in erosion and sedimentation, but no single process-like a lowering of sea levels or expanded glaciation-can explain increases in sedimentation in all environments, encompassing continental margins and interiors, and tropical as well as higher latitudes. We suggest that climate affected erosion mainly by the transition from a period of climate stability, in which landscapes had attained equilibrium configurations, to a time of frequent and abrupt changes in temperature, precipitation and vegetation, which prevented fluvial and glacial systems from establishing equilibrium states.
Authors:
Z Peizhen; P Molnar; W R Downs
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Nature     Volume:  410     ISSN:  0028-0836     ISO Abbreviation:  Nature     Publication Date:  2001 Apr 
Date Detail:
Created Date:  2001-04-19     Completed Date:  2001-05-21     Revised Date:  2003-10-31    
Medline Journal Info:
Nlm Unique ID:  0410462     Medline TA:  Nature     Country:  England    
Other Details:
Languages:  eng     Pagination:  891-7     Citation Subset:  -    
Affiliation:
Institute of Geology, State Seismology Bureau, Beijing, China.
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