Arch Johnston is a leader in the study of this region, and he analyzed three separate events in this region that took place in the span of six weeks in (*) 1811 and 1812.
A paper by Thomas L. Platt suggests that this region is 64,000 years old based on uplift from the Tiptonville Dome in Lake County and motions of the Blytheville Arch and Crowley's Ridge. It is speculated that the edge of the Farallon plate is currently located below this region. Arch Johnston is a leader in the study of this region, and he analyzed three separate events in this region that took place in the span of six weeks in (*) 1811 and 1812. That incident was responsible for the creation of Reelfoot Lake and forced the Mississippi to run backward. This area is southeast of a similar type of region in the Wabash Valley and is bounded by Marked Tree, Cairo, and its namesake city. Most recently responsible for activity in Greenbrier, Arkansas, for 15 points, identify this region located in eastern Missouri and Arkansas and Western Tennessee whose seismic activity threatens the city of Memphis.
A paper by Thomas L. Platt suggests that this region is 64,000 years old based on uplift from the Tiptonville Dome in Lake County and motions of the Blytheville Arch and Crowley's Ridge.
New Madrid Seismic Zone