“…Precambrian (>540 Ma). In an attempt to identify the better results and to provide objective grounds for rejecting poorer data, Biggin and Paterson (2014) (Donadini et al 2011), the Lake Shore Traps (Kulakov et al 2013), the Gardar lavas (Thomas and Piper, 1995), the Sudbury irruptive (Schwarz and Symons, 1970), the Matachewan dykes (Macouin et al 2003;Smirnov and Tarduno, 2005;Halls et al 2004), the Burakovka intrusion (Smirnov et al 2003)…”