An Update of Studies of the Bootheel Lineament in the New Madrid Seismic Zone, Southeastern Missouri and Northeastern Arkansas

• DOI: 10.1785/gssrl.63.3.277
• Publication Date: 2019-07-25T16:55:20Z
• Authors: Eugene S. Schweig; Ronald T. Marple; Yong Li
• Keywords: Lineament; Echelon formation

Abstract Five trenches across the Bootheel lineament, a possible surface expression of one coseismic faults great New Madrid earthquakes 1811 and 1812, indicate that ground failure took place along this 135-km-long feature, probably in or 1812. The morphology en echelon pattern north-northeast-trending lineament are suggestive strike-slip displacement on fault. Three cross portions which liquefied sand was injected. Vertically displaced strata were observed two these trenches, but could be due to collapse caused by removal from below. Shear zones exposed other do not appear directly related liquefaction may represent near-surface deformation associated with deeper potentially seismogenic structures.