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Idea Paper 4D-Earth Initiative: A Community Geologic Model and New Scientific Initiative for Illuminating the Evolution of the North American Continent A new initiative and a successor to the EarthScope Program Mike Williams, Steve Whitmeyer, Laura Webb, Terry Pavlis, John Hole, Becky Flowers, and others 1. Expand the primarily 3-D geophysical focus that captured a snapshot of present day North America into the 4th dimension of time Geochronology 1. Illuminate the crustal component that was below the resolution of much of the USArray image Active-source seismology 1. Develop a Community Geologic Model to build a 4-dimensional image of the continent Cyberinfrastructure Idea Paper 4D-Earth Initiative: A Community Geologic Model and New Scientific Initiative for Illuminating the Evolution of the North American Continent Starting Point: Build a set of time slices where each time slice is a digital model in itself, incorporating data sets, hypotheses, simulations, models of structure, stratigraphy, geochronology, geomorphology, petrology, lithospheric and crustal dynamics, and high-resolution geophysics and environmental sensing enabled by observational networks such as those built by EarthScope. 1.70 ~ 0.54 1.80 1.75 1.65 1.50 1.40 1.20 1.00 0.70 0.60 1.60 Ga Idea Paper 4D-Earth Initiative: A Community Geologic Model and New Scientific Initiative for Illuminating the Evolution of the North American Continent Next Steps: Fall, 2016 - 2017 • Workshops to synthesize what we have learned from EarthScope and other projects on the structure and evolution of Laurentia / North America through time. Details to follow… • Identify one or two pilot time slices in which to begin to develop the community model and explore the necessary cyberinfrastructure