The largest dyke swarm on Earth was formed by one of these features that existed 1.3 billion years ago, named for Mackenzie. Kimberlite intrusions are probably formed by these features. Jonathan Hagstrum postulated that antipodal pairs of these features are caused by large oceanic impact events and the focusing of seismic waves on the opposite side of the Earth. These features, which were first theorised by John Tuzo Wilson, are most commonly attributed to (*) deep-mantle plumes. (10[1])The Deccan Traps may have been produced by one of these features that now (-5[1])lies beneath Réunion. Since these features are static, chains of volcanoes can be created as tectonic plates move over them. (10[1])For 10 points, name these geological features responsible for the formation of the Canary Islands and Hawaiian Islands. ■END■ (0[1])