1 2 3 4 5 6 The MAGIC experiment: A combined seismic and magnetotelluric deployment to 7 investigate the structure, dynamics, and evolution of the central Appalachians 8 9 Maureen D. Long1*, Margaret H. Benoit2, Rob L. Evans3, John C. Aragon1,4, James Elsenbeck3,5 10 11 12 1Department of Geology and Geophysics, Yale University, PO Box 208109, New Haven, CT, 13 06520, USA. 14 2National Science Foundation, 2415 Eisenhower Ave., Alexandria, VA, 22314, USA. 15 3Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Clark 263, 16 MS 22, Woods Hole, MA, 02543, USA. 17 4Now at: Earthquake Science Center, U.S. Geological Survey, 345 Middlefield Rd., MS 977, 18 Menlo Park, CA, 94025, USA. 19 5Now at: Lincoln Laboratories, Massachusetts Institute of Technology, 244 Wood St., Lexington, 20 MA, 02421, USA. 21 22 23 Revised manuscript submitted to the Data Mine section of Seismological Research Letters 24 25 26 27 28 29 *Corresponding author. Email:
[email protected] 30 31 32 33 34 35 36 37 38 1 39 ABSTRACT 40 The eastern margin of North America has undergone multiple episodes of orogenesis and 41 rifting, yielding the surface geology and topography visible today. It is poorly known how the crust 42 and mantle lithosphere have responded to these tectonic forces, and how geologic units preserved 43 at the surface relate to deeper structures. The eastern North American margin has undergone 44 significant post-rift evolution since the breakup of Pangea, as evidenced by the presence of young 45 (Eocene) volcanic rocks in western Virginia and eastern West Virginia and by the apparently recent 46 rejuvenation of Appalachian topography.