The timing of the Gold Cove glacial event: A comment on “Signature of the Gold Cove event (10.2 ka) in the Labrador Sea”

Heinrich 0 on the east Canadian margin: Source, distribution, and timing

“…More recently, during the early Holocene, smaller and lesser known ice advances on the LIS in Hudson Strait (e.g., Noble Inlet and Gold Cove events) and the final Lake Agassiz drainage event are also known to have deposited detrital carbonate layers in the western Labrador Sea [ Hillaire‐Marcel et al ., ; Levac et al ., ; Rashid et al ., ; Jennings et al ., ; Pearce , ]. Therefore, the studied DC layer may, theoretically, have originated from the earliest of these events, the Gold Cove readvance.…”

“…Therefore, the studied DC layer may, theoretically, have originated from the earliest of these events, the Gold Cove readvance. The Gold Cove glacial event was a very rapid expansion and subsequent retreat of an ice stream over the Hudson Strait in the early Holocene [ Miller and Kaufman , ; Kaufman et al ., ; Pfeffer et al ., ; Manley and Miller , ; Andrews and MacLean , ; Dyke , ; Pearce , ]. The main reason for discarding the Gold Cove event as source for the studied DC event, however, is its timing, since the onset of this re‐advance occurred after the H0 event.…”

“…It is relatively well dated to a maximum calibrated age of ~11.3 cal kyr B.P. (with absolute minimal reservoir age offset Δ R = 0) [ Kaufman et al ., ; MacLean et al ., ; Pearce , ], which is too young when compared to the AI07‐14G DC layer. The unlikelihood of the link with the Gold Cove advance is also confirmed by the carbonate stratigraphy of Cartwright Saddle [ Jennings et al ., ], in which the Gold Cove and H0 are clearly different events represented by separate DC peaks.…”

Reconstruction of North American drainage basins and river discharge since the Last Glacial Maximum

“…which occurred in two pulses: H1A (16.8-16.3 ka) and H1B (15.9-15.7 ka) (Gil et al, 2015). Heinrich Event 0, formerly thought to have an age of 12.8-12.3 ka, which corresponds to the Younger Dryas (Andrews and Tedesco, 1992;Clark et al, 2001), has been recently shown to correlate with early Holocene warming and melt from 11.5-11.3 ka (Pearce et al, 2015). Later ice-rafting events are related to ice advances of the Québec-Labrador dome into Ungava Bay (Kaufman and Miller, 1993;Metz et al, 2008;Rashid et al, 2014;Pearce, 2015;Jennings et al, 2015); these comprise the 11.0-10.6 ka Gold Cove advance (Pearce, 2015) and the 9.7-9.2 ka Noble Inlet advance (Jennings et al, 2015).…”

“…It is possible that this is due to data-collection issues (e.g., few organics) and data sparsity (few settlements and fewer GPS monuments) in this formerly fully ice-covered region, leading to a lack of good regional constraints on ice-sheet thickness near the center of the Laurentide Ice Sheet. However, recent data sets have brought more clarity to the Hudson Strait record (e.g., Rashid et al, 2014;Gil et al, 2015;Pearce et al, 2015;Pearce, 2015;Jennings et al, 2015), furthering the argument that this mismatch could be because the models do not accurately represent the dynamics of the marine-terminating Hudson Strait ice catchment (e.g., MacAyeal, 1993). An additional complication of Hudson Bay/Strait is that its drainage area was smaller at the LGM (Fig.…”