Shelf erosion and glacial ice proximity in the Labrador Sea during and after Heinrich events (H-3 or 4 to H-0) as shown by foraminifera

Possible grounding line positions of ice streams in Hudson Strait and Cumberland Sound over the last c.34 ka are delimited. Heinrich events 1 and 2 contain no evidence of glacial erosion of the continental shelf, suggesting that the Hudson Strait ice stream may have grounded on the Hudson Strait sill or on the inner shelf rather than at the shelf edge during these events. Dark grey, dolomite-rich sediments with abundant shelf-dwelling foraminifera document an advance of Cumberland Sound ice onto the shelf after H-3 or H-4 (c.34 ka), but before H-2 (c.21 ka). Cumberland Sound ice readvanced to a position at or near the shelf edge at c.11.1 ka, during the Younger Dryas chron.