Central U.S. Model Overview

Model overview. The regional structure is constructed by extending the physical properties of most of the well-defined units to less well-constrained areas in the Mississippi Embayment and the CUS: Paleozoic, Crystalline Upper Crust, Lower Crust, Modified Lower Crust and Upper Mantle. The Mesozoic to Cenozoic materials are represented by several units within the Mississippi Embayment and a Vs30 based layer outside the embayment.