The collapse of the Cordilleran–Laurentide ice saddle and early opening of the Mackenzie Valley, Northwest Territories, Canada, constrained by ¹⁰Be exposure dating by B. J. Stoker, M. Margold, J. C. Gosse, A. J. Hidy, A. J. Monteath, J. M. Young, N. Gandy, N. Gandy, L. J. Gregoire, S. L. Norris, D. Froese

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