Contrasting Along-Slope vs. Downslope Sedimentation Style on the High-Latitude Eastern Canadian Continental Margin During the Last 40 ka

Late Pleistocene Labrador Sea depositional systems developed in front of ice streams and glacier outlets from the Laurentide Ice Sheet (LIS) are documented by Huntec 3.5 kHz seismic profiles piston cores. Due to efficient grinding LIS, massive amounts fine-grained sediments meltwater addition icebergs linked Heinrich events (H events) last glaciation were delivered neighboring Sea. The position Hudson Strait stream during periodic expansion contraction on margin allowed direct delivery lower shelf upper slope. These discharges then transported southward Current western boundary current. In contrast slope, mid Slope Northwest Atlantic Mid-Ocean Channel distal sites. nepheloid flow layer at or near sea bottom mid-water depths loaded with an excessive charge sediments. Contrastingly, non-discriminatory rafting process detritus all sizes, but its total contribution sediment column was only minor, notwithstanding paleoclimatic significance H events. H1, H2, H4 layers identified their characteristic deposits, that is, alternating coarse silt clay-sized laminae thin ice-rafted debris interspersed coarse- dropstone. Furthermore, progressive thinning eventual disappearance fine-laminae (i.e., fine silt/clay) sites suggest exhaustion raining out fines due long-distance transport. However, H3 a combination deposits (upper slope) finely laminated mud turbidites (lower slope deep basin) proximal Basin, stratigraphic equivalent exorbitantly thick carbonate-rich turbidites. divergent sedimentation style reflected facies) thickness compared other different Therefore, our data imply divergence between eastern North might lie continental margin.