As mention above, it was postulated that there are three, possibly four tectophases that represent increased convergence or possible collision between the continental margin promontories and Avalon terranes.
Como se indicou antes, postulouse que houbo tres ou posiblemente catro tectofases que representan a crecente converxencia ou posible colisión entre os promontorios das marxes continentais e os terreos de Avalonia.