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Recent well-dated isotopic (Sr–Nd) fingerprinting of Heinrich layer ice-rafted detritus (IRD) on the European margin indicates supply from European ice sheets as precursors to Laurentide Ice Sheet (LIS) supply [F.E. Grousset et al., Geology 28 (2000) 123–126, H. Snoeckx et al., Mar. Geol. 158 (1999) 197–208]. These precursor events lead LIS input by up to 1.5 ka [F.E. Grousset et al., Geology 28 (2000) 123–126] and have been interpreted to indicate LIS collapse during Heinrich events stimulated by events originating on the European side of the Atlantic [F.E. Grousset et al., Geology 28 (2000) 123–126]. Such phasing of IRD supply from different sources within Heinrich layers therefore has implications for the origin and mechanics of Heinrich events. We present evidence here that the IRD comprising Heinrich layer 2 (H2; ∼20–21 ¹⁴C ka BP) on the European continental margin contains detrital Campanian Upper …