Fig. 1: Reconstruction of North American ice sheets during Marine Isotope Stage 3.
From: A new global ice sheet reconstruction for the past 80 000 years

a 47,500 yr BP—minimal scenario, b 45,000 yr BP, prior to Heinrich Event 5—minimal scenario, c 42,500 yr BP, after Heinrich Event 5—minimal scenario with full deglaciation of Hudson Bay, d 47,500 yr BP—maximal scenario, e 45,000 yr BP, prior to Heinrich Event 5—maximal scenario, f 42,500 yr BP, after Heinrich Event 5—maximal scenario with less retreat. The contour interval is 500 m.