Cyclic Sedimentation (Cyclothem)

2012 ◽  
Keyword(s):  
Cyclic Sedimentation

Cyclic Sedimentation: A Review

1960 ◽  
Vol 97 (5) ◽  
pp. 389-403 ◽  
Author(s):  
Alan J. Wells
Keyword(s):  
North America ◽  
World Wide ◽  
Sedimentary Basin ◽  
Geographical Location ◽  
Depositional Environments ◽  
Lateral Migration ◽  
Lateral Variation ◽  
Sea Floor ◽  
Cyclic Sedimentation ◽  
The World

AbstractThe well-known Carboniferous cyclothems of North America and Europe are discussed as examples to illustrate the great extent and lateral variation of sedimentary cycles. Very many other instances of cyclic sedimentation, in rocks of most ages, in many parts of the world, are also characterized by a more or less regular lateral migration of simultaneously existing depositional environments, caused by repeated transgressions and regressions of the sea over an epicontinental platform. Theories of varying complexity which have sought to explain cyclic sedimentation are briefly summarized, and it is suggested that the two basic requirements are a slowly subsiding sedimentary basin and more or less regular eustatic changes of sea level. The former will decide the geographical location. The latter could be a natural, periodic and world-wide consequence of the combination of the continuous effects of sedimentation and sostatic or orogenic movements of the sea floor.

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