Conclusions
I am fortunate to have been among the Cordilleran geologists who gained immeasurably from grassroots communication and partnership among structural geologists internationally. The immediacy of impact of these cross-boundary interactions is historic, I believe, as related to the intertwining of fundamental research, teaching, and PhD training. The National Science Foundation, which supported much of my work and for which I here again acknowledge appreciation, should feel some pleasure in their investments, which spread so far in terms of discovery and education. I feel particularly fortunate to have engaged in the full partnership in the early going: first by having hosted numerous structural geologists, taking these colleagues into the field, showing them the spectacular, controversial ‘extensional’ record of structures and fabrics in core complexes in southern Arizona; and in the process receiving benefits of reciprocation beyond full measure.