To be published in Earth and Planetary Science Letters DOI: 10.1016/j.epsl.2013.10.012 Static and dynamic support of western United States topography

• Isostatic models of topography improved using crustal structure from USArray passive seismology. • Basin and Range shows anomalously high residual topography, Colorado Plateau appears normal. • Mantle flow models predict most of the dynamic component of topography in western U.S. Isostatic and dynamic models of Earth’s surface topography can provide important insights into the driving processes of tectonic deformation. We analyze these two estimates for the tectonically-active western United States using refined structural models derived from EarthScope USArray. For the crust, use of recent Moho depth measurements and crustal density anomalies inferred from passive source seismology improve isostatic models. However, seismically determined lithospheric thickness variations from “lithosphere / asthenosphere boundary ” (LAB) maps, and lithospheric and mantle density anomalies derived from heat flow or uppermost mantle tomography