over a period of 22 years numerous reports relating the antler orogeny and roberts mountains thrust to plate convergence were published in various journals, and because their basic tenets have been widely accepted, they are here termed the conventional theories. the earliest effort to relate plate tectonics specifically to the antler orogeny was briefly outlined by e.m. moores: "a collision of this continental margin with a subduction zone dipping away from it in late devonian-early mississippian time ... resulted in deformation of the pre-existing continental marginal rocks in the antler orogeny."