Bernard Bingen Hannu Huhma Tod Waight Rikke Vestergaard Alvar Soesoo Grazina Skridlaite Ewa Krzeminska Leonid Shumlyanskyy Mark E. Holland Christopher S. Holm-Denoma Wilson Teixeira Frederico Faleiros Bruno Riberio Joachim Jacobs Cheng-Cheng Wang Robert Thomas Paul Macey Christopher Kirkland Michael Hartnady Bruce Eglington Stephen Puetz Kent Condie Ake Johansson 2022 <p id="sp0015">A total of 4344 magmatic U-Pb ages in the range 2300 to 800&nbsp;Ma have been compiled from the Great Proterozoic Accretionary Orogen along the margin of the Columbia / Nuna supercontinent and from the subsequent Grenvillian collisional orogens forming the core of Rodinia. The age data are derived from Laurentia (North America and Greenland, n&nbsp;=&nbsp;1212), Baltica (NE Europe, n&nbsp;=&nbsp;1922), Amazonia (central South America, n&nbsp;=&nbsp;625), Kalahari (southern Africa and Dronning Maud Land in East Antarctica, n&nbsp;=&nbsp;386), and western Australia (n&nbsp;=&nbsp;199). Laurentia, Baltica, and Amazonia (and possibly other cratons) most likely formed a ca. 10&nbsp;000-km-long external active continental margin of Columbia from its assembly at ca. 1800&nbsp;Ma until its dispersal at ca. 1260&nbsp;Ma, after which all cratons studied were involved in the Rodinia-forming Grenvillian orogeny. However, the magmatic record is not smooth and even but highly irregular, with marked peaks and troughs, both for individual cratons and the combined data set.</p> application/pdf 10.1016/j.precamres.2021.106463 en Elsevier A geochronological review of magmatism along the external margin of Columbia and in the Grenville-age orogens forming the core of Rodinia article