Probability of moraine survival in a succession of glacial advances

A probability analysis of the likely impact of obliterative overlap on the completeness of the glacial record assumes that moraines were deposited at various distances from their glacial source areas randomly over time. Assuming randomness and obliterative overlap, after 10 glacial episodes, the mos...

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Bibliographic Details
Published in:Geology (Boulder) 1984-06, Vol.12 (6), p.327-330
Main Authors: Gibbons, Anthony B, Megeath, Joe D, Pierce, Kenneth L
Format: Article
Language:English
Subjects:
Cenozoic
deposition
glacial features
glacial geology
glacial sedimentation
glacial transport
ice movement
moraines
Pleistocene
probability
processes
Quaternary
Quaternary geology
sedimentation
statistical analysis
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Summary:A probability analysis of the likely impact of obliterative overlap on the completeness of the glacial record assumes that moraines were deposited at various distances from their glacial source areas randomly over time. Assuming randomness and obliterative overlap, after 10 glacial episodes, the most likely number of surviving moraines is only three. The record of the Pleistocene is in agreement with the probability analysis: the 10 glaciations during the past 0.9 m.y. inferred from the deep-sea record resulted in morained sequences in which only two or three different-aged moraine belts can generally be distinguished.—Modified journal abstract.
ISSN:0091-7613
1943-2682
DOI:10.1130/0091-7613(1984)12<327:POMSIA>2.0.CO;2