PLATE ASSUMPTIONS. “Some investigators infer intricate aggregations and sunderings much more chaotic than modern plate behavior of hypothetical supercontinents Columbia and Rodinia (Fig. 32a) found little change from 1000 to 750 m.y. ago but rationalized that plate activity occurred during that era without differential motions.”
https://www.sciencedirect.com/science/article/pii/S0012825219302636?via=ihub