A 3D resistivity model based on EarthScope magnetotelluric data is presented.
The model of the mid-continent constrains Precambrian structure and evolution.
The model shows geometry, extent, and segmentation of the Midcontinent rift system.
The model reveals the distribution of Paleoproterozoic (Penokean) metasediments.
Hydration of the lithospheric mantle occurred in response to melt metasomatism.