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The Resource Paleoliquefaction and possible surface deformation along the New Madrid Seismic Zone in Yarbro, Arkansas, by James Christian Dunahue

Paleoliquefaction and possible surface deformation along the New Madrid Seismic Zone in Yarbro, Arkansas, by James Christian Dunahue

Creator
Author
Contributor
Summary
From interpretation of historical aerial photography and LiDAR imagery of northeast Arkansas, we identified a northeast-striking topographic lineament coincident with the trend of modern seismicity along the Axial Fault (AF) in the New Madrid Seismic Zone (NMSZ) (Fig. 1). The linear ridge extends 7.0 km across the landscape, is approximately 1 - 2 m higher than the topography to the east and west, and has en echelon trend segments. The anomalous topography appears to crosscut scroll bars, meander loops, and other geomorphic features along this portion of the Mississippi floodplain. This study sought to determine whether the lineament was of depositional or tectonic origin. We collected geophysical data including electrical resistivity (ERT), ground penetrating radar (GPR), magnetics, and seismic refraction across the ridge at three locations in order to image the subsurface of the structure of the ridge. ERT data show an abrupt discontinuity between higher and lower resistivity at depth beneath the western margin of the ridge suggesting a possible fault. Paleoseismic trenches excavated across the western side of the ridge revealed both a large, linear graben and a large linear sand blow with multiple sand units. The graben is 6.5 m wide and 1.0 m deep, and is filled with an organic-rich clay plug with many fractures along which root casts have formed and sand dikes have intruded. The liquefaction features include a main 1.8-m-wide, feeder dike that crosscuts a paleosol, several subsidiary dikes, and an overlying and related compound sand blow. These data suggest that the linear ridge graben pair and the parallel sand blow features may either be evidence for an active fault or be related to earthquake - induced lateral spreading and liquefaction. It is possible that the two features may both reveal and mask the presence of an active fault
Language
eng
Work
Publication
Extent
1 online resource (47 pages)
Note
  • "A thesis in Environmental and Urban Geosciences."
  • Advisor: Tina M. Niemi
  • Vita
Contents
  • Introduction
  • Tectonic and geologic history
  • Local geologic and geomorphic settings
  • Paeloseismic investigation
  • Discussion
  • Conclusion
Instance
Label
Paleoliquefaction and possible surface deformation along the New Madrid Seismic Zone in Yarbro, Arkansas
Title
Paleoliquefaction and possible surface deformation along the New Madrid Seismic Zone in Yarbro, Arkansas
Statement of responsibility
by James Christian Dunahue
Creator
Contributor
Author
Degree supervisor
Subject
Genre
Language
eng
Summary
From interpretation of historical aerial photography and LiDAR imagery of northeast Arkansas, we identified a northeast-striking topographic lineament coincident with the trend of modern seismicity along the Axial Fault (AF) in the New Madrid Seismic Zone (NMSZ) (Fig. 1). The linear ridge extends 7.0 km across the landscape, is approximately 1 - 2 m higher than the topography to the east and west, and has en echelon trend segments. The anomalous topography appears to crosscut scroll bars, meander loops, and other geomorphic features along this portion of the Mississippi floodplain. This study sought to determine whether the lineament was of depositional or tectonic origin. We collected geophysical data including electrical resistivity (ERT), ground penetrating radar (GPR), magnetics, and seismic refraction across the ridge at three locations in order to image the subsurface of the structure of the ridge. ERT data show an abrupt discontinuity between higher and lower resistivity at depth beneath the western margin of the ridge suggesting a possible fault. Paleoseismic trenches excavated across the western side of the ridge revealed both a large, linear graben and a large linear sand blow with multiple sand units. The graben is 6.5 m wide and 1.0 m deep, and is filled with an organic-rich clay plug with many fractures along which root casts have formed and sand dikes have intruded. The liquefaction features include a main 1.8-m-wide, feeder dike that crosscuts a paleosol, several subsidiary dikes, and an overlying and related compound sand blow. These data suggest that the linear ridge graben pair and the parallel sand blow features may either be evidence for an active fault or be related to earthquake - induced lateral spreading and liquefaction. It is possible that the two features may both reveal and mask the presence of an active fault
Cataloging source
UMK
http://library.link/vocab/creatorDate
1985-
http://library.link/vocab/creatorName
Dunahue, James Christian
Degree
M.S.
Dissertation note
(Department of Geosciences).
Dissertation year
2019.
Granting institution
University of Missouri-Kansas City,
Illustrations
illustrations
Index
no index present
Literary form
non fiction
Nature of contents
  • dictionaries
  • bibliography
  • theses
http://library.link/vocab/relatedWorkOrContributorName
Niemi, Tina M.
http://library.link/vocab/subjectName
  • New Madrid Seismic Zone
  • Yarbro (Ark.)
  • Soil liquefaction
  • Surfaces, Deformation of
Label
Paleoliquefaction and possible surface deformation along the New Madrid Seismic Zone in Yarbro, Arkansas, by James Christian Dunahue
Instantiates
Publication
Copyright
Note
  • "A thesis in Environmental and Urban Geosciences."
  • Advisor: Tina M. Niemi
  • Vita
Antecedent source
not applicable
Bibliography note
Includes bibliographical references (pages 44-46)
Carrier category
online resource
Carrier category code
  • cr
Carrier MARC source
rdacarrier
Color
black and white
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Contents
Introduction -- Tectonic and geologic history -- Local geologic and geomorphic settings -- Paeloseismic investigation -- Discussion -- Conclusion
Control code
1154769659
Dimensions
unknown
Extent
1 online resource (47 pages)
File format
one file format
Form of item
online
Level of compression
mixed
Media category
computer
Media MARC source
rdamedia
Media type code
  • c
Other physical details
illustrations.
Quality assurance targets
not applicable
Specific material designation
remote
System control number
(OCoLC)1154769659
System details
  • The full text of the thesis is available as an Adobe Acrobat .pdf file; Adobe Acrobat Reader required to view the file
  • Mode of access: World Wide Web
Label
Paleoliquefaction and possible surface deformation along the New Madrid Seismic Zone in Yarbro, Arkansas, by James Christian Dunahue
Publication
Copyright
Note
  • "A thesis in Environmental and Urban Geosciences."
  • Advisor: Tina M. Niemi
  • Vita
Antecedent source
not applicable
Bibliography note
Includes bibliographical references (pages 44-46)
Carrier category
online resource
Carrier category code
  • cr
Carrier MARC source
rdacarrier
Color
black and white
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Contents
Introduction -- Tectonic and geologic history -- Local geologic and geomorphic settings -- Paeloseismic investigation -- Discussion -- Conclusion
Control code
1154769659
Dimensions
unknown
Extent
1 online resource (47 pages)
File format
one file format
Form of item
online
Level of compression
mixed
Media category
computer
Media MARC source
rdamedia
Media type code
  • c
Other physical details
illustrations.
Quality assurance targets
not applicable
Specific material designation
remote
System control number
(OCoLC)1154769659
System details
  • The full text of the thesis is available as an Adobe Acrobat .pdf file; Adobe Acrobat Reader required to view the file
  • Mode of access: World Wide Web

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