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19 - The Search for Glacially Induced Faults in Eastern Canada

from Part V - Glacially Triggered Faulting Outside Europe

Published online by Cambridge University Press:  02 December 2021

By
John Adams  and
Gregory R. Brooks
Edited by
Holger Steffen ,
Odleiv Olesen  and
Raimo Sutinen
Holger Steffen
Affiliation:
Lantmäteriet, Sweden
Odleiv Olesen
Affiliation:
Geological Survey of Norway
Raimo Sutinen
Affiliation:
Geological Survey of Finland
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Summary

There is abundant evidence for high levels of seismic activity during deglaciation of Eastern Canada, suggesting that the seismic response of Eastern Canada to deglaciation is analogous to Fennoscandia, where numerous glacially induced faults have been confirmed. However, the Canadian record of glacially induced faults is scant. The two probable glacially induced faults that are described are few compared to the 100+ surface ruptures that are expected on statistical grounds. Alternative explanations to account for the small number of known ruptures are provided together with an interpretation of certain normal faulting that has been observed in glaciolacustrine sediments. It is recommended that the interpretation of prospective glacially induced fault features utilize a sceptical approach employing judgemental scales that reflect data limitations and associated uncertainties.

Keywords

Eastern CanadaPalaeoseismologyNeotectonicsSeismicitySurface RuptureHoly Grail FaultRound LakeGlaciolacustrine SedimentsDigital Elevation Model
Type
Chapter
Information
Glacially-Triggered Faulting , pp. 341 - 352
Publisher: Cambridge University Press
Print publication year: 2021

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