Sur l'âge des trapps basaltiques . On the ages of flood basalt events . Vincent E. . Courtillota . Paul R. . Renneb . Comptes Rendus Geoscience . 335 . 1 . January 2003 . 113–140. 10.1016/S1631-0713(03)00006-3 . 2003CRGeo.335..113C .
estimated to be 1.07 mya
Bradley S. Singer . Malcolm S. Pringleb . We have obtained Ar/Ar isochron ages using incremental heating techniques on groundmass separates, phenocryst-poor whole rock samples, or plagioclase, from eight basaltic to andesitic lavas that erupted during the Matuyama-Brunhes (M-B) polarity transition at four geographically dispersed sites. These eight lavas range from 784.6 ± 7.1 ka to 770.8 ± 5.2 ka (1 σ errors); the weighted mean, 778.7 ± 1.9 ka, gives a high-precision age that is remarkably consistent with revised astronomical age estimates for the M-B polarity transition . 10.1016/0012-821X(96)00003-9 . 1996E&PSL.139...47S . 139 . Age and duration of the Matuyama-Brunhes geomagnetic polarity reversal from incremental heating analyses of lavas . Earth and Planetary Science Letters . 1996 . 1–2 . 47–61.