Quaternary Displacement Rates on the Meeman‐Shelby Fault and Joiner Ridge Horst, Eastern Arkansas: Results from Coring Mississippi River Alluvium

Ward, Alex C.; Counts, Ronald C.; Arsdale, Roy Van; Larsen, Daniel; Mahan, Shannon A.

doi:10.1785/0220160171

Cited by 9 publications

(3 citation statements)

References 46 publications

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“…The base of the Quaternary alluvium, marked by the upper Eocene/Quaternary contact, is folded by 28 m above the fault with a consistent sense of motion. The base of the Quaternary alluvium along the fault hanging wall was drilled, sampled, and dated at 14.3 ± 0.50 ka (thousand years ago) ( 80 ), confirming the recent age of fault movement. Despite its recent activity, the fault has no surface manifestation, likely due to its position within the Mississippi River meander belt that does not favor preservation of surface morphology over the long term.…”

Section: Resultsmentioning

confidence: 85%

Discriminating between natural versus induced seismicity from long-term deformation history of intraplate faults

et al. 2017

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Section: Resultsmentioning

confidence: 85%

Discriminating between natural versus induced seismicity from long-term deformation history of intraplate faults

et al. 2017

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“…Although the seismic reflection data and scarp mapping show only down-to-the-west faulting, we speculate that the closely spaced faults with both normal and reverse offset (Van Arsdale et al, 1995) could be indicative of a flower structure. Given that other faults in the NMSZ with similar orientations, such as the Bootheel fault (Guccione et al, 2005) and Meeman-Shelby fault (Hao et al, 2013;Ward et al, 2017), exhibit both dextral and dip-slip movement, it is likely that the West Crowleys Ridge fault is reverse-oblique in slip sense (Stine & Van Arsdale, 2017), but the surficial evidence of dextral movement is poorly preserved or masked by anthropogenic or fluvial activity. Previous studies have suggested that the eastern margin of central Crowleys Ridge is also faultbounded based on seismic reflection and borehole data (Stine & Van Arsdale, 2017;Van Arsdale et al, 1995).…”

Section: Regional Fault Networkmentioning

confidence: 99%

Evidence for Late Quaternary Deformation Along Crowleys Ridge, New Madrid Seismic Zone

et al. 2020

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The New Madrid seismic zone has been the source of multiple major (M~7.0-7.5) earthquakes in the past 2 ka, yet the surface expression of recent deformation remains ambiguous. Crowleys Ridge, a linear ridge trending north-south for 300+ km through the Mississippi Embayment, has been interpreted as either a fault-bounded uplift or a nontectonic erosional remnant. New and previously published seismic reflection and shallow resistivity data show discontinuities at the ridge margins in Plio-Pleistocene strata, yet the timing of most recent faulting and the lateral extent of these faults remain unknown. To assess Pleistocene-to-recent tectonic activity of Crowleys Ridge, we perform landscape-scale geomorphic analyses, such as relief, slope, hypsometry, and drainage basin shape, on a 10-m digital elevation model (DEM). North-to-south variations in geomorphic indices indicate Pleistocene-to-recent tectonic uplift of the southern ridge. Moreover, mapping on a <1-m lidar-derived DEM reveals scarps on late Pleistocene geomorphic surfaces. The scarps are primarily located along the southern ridge, trend parallel to the ridge margin discontinuously for 0.1-1 km, and vertically offset <56 ka surfaces 0.4 m with up to 6 m of tilting. These landscape-scale patterns and scarps, integrated with discontinuities in the seismic reflection and resistivity data, provide evidence of low-rate (<0.2 mm/year) late Quaternary tectonic activity along the southern segment of Crowleys Ridge. The interpretations agree with recent tectonic models suggesting southern Crowleys Ridge is a compressional step over in a right-lateral fault system within the Reelfoot Rift.

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“…Quaternary deposits adjacent to Lake County include Pleistocene fluvial, lacustrine, and eolian deposits as well as Holocene fluvial deposits. Fluvial deposits of the Pleistocene consist primarily of braid belt terrace deposits (Saucier, 1994;Rittenour et al, 2007;Cupples and Van Arsdale, 2014;Ward et al, 2017). Pleistocene lacustrine deposits are locally found along the Mississippi River bluffs and Mississippi River tributaries (Saucier, 1987(Saucier, , 1994Grimley et al, 2009).…”

Section: Geologic History Of the Central Mississippi River Valleymentioning

confidence: 99%

Lake County, Tennessee, in the Heart of the New Madrid Seismic Zone

Weathers

Arsdale

2019

Front. Earth Sci.

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Lake County, Tennessee, lies within the center of the New Madrid seismic zone, and thus is particularly vulnerable to seismic hazards. To better evaluate the seismic threat to Lake County, the stratigraphy and structure were mapped beneath the county. A shallow 3-D lithologic model was constructed to illustrate the Quaternary Mississippi River alluvial facies of Lake County in five-foot (1.5 m) thick layers to a depth of 300 feet (91.4 m). This model provides near-surface geologic data for the determination of earthquake liquefaction potential and illustrates the Mississippi River alluvial aquifer for optimum agricultural water exploitation. In addition, faulted structure contour maps were made of the tops of the unconformable Paleozoic, Cretaceous, and Eocene sections. With these structure contour maps a deep 3-D geologic model was built for Lake County, which shows the stratigraphy and structure from the Quaternary to the Paleozoic. Crosssections were also created to illustrate the subsurface geology. The faulted structure contour maps and cross-sections reveal Quaternary faulting on the Reelfoot North, Axial, Tiptonville dome back thrust, Lake County uplift back thrust, Cottonwood Grove, Ridgely, and previously unidentified faults. The maps also illustrate where surface fault rupture may occur and the sense of vertical surface displacement in the event of a future large earthquake.

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Quaternary Displacement Rates on the Meeman‐Shelby Fault and Joiner Ridge Horst, Eastern Arkansas: Results from Coring Mississippi River Alluvium

Cited by 9 publications

References 46 publications

Discriminating between natural versus induced seismicity from long-term deformation history of intraplate faults

Discriminating between natural versus induced seismicity from long-term deformation history of intraplate faults

Evidence for Late Quaternary Deformation Along Crowleys Ridge, New Madrid Seismic Zone

Lake County, Tennessee, in the Heart of the New Madrid Seismic Zone

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