Liquefaction evidence for two Holocene paleo-earthquakes in central and southwestern Illinois

@inproceedings{Mcnulty1997LiquefactionEF,
  title={Liquefaction evidence for two Holocene paleo-earthquakes in central and southwestern Illinois},
  author={William E. Mcnulty and Stephen F. Obermeier},
  year={1997}
}
Two strong Holocene earthquakes in Illinois have been delineated by paleoliquefaction features such as clastic dikes, sills, and detachments of fine-grained sediment that sunk into liquefied sand. One paleo-earthquake occurred in central Illinois, about 35 km NE of Springfield, between about 5,900 and 7,400 yr BP. Dike widths are as much as 0.4 m in the presumed epicenter. Dike widths attenuate with distance from the epicenter to as far as 30 km, where they disappear. Another paleo-earthquake… CONTINUE READING

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