Geomorphic evidence for late glacial ice dynamics on southern Baffin Island and in outer Hudson Strait, Nunavut, Canada

We here describe glacial geomorphology that sheds light on ice-dynamic cond itions during the Noble Inlet advance, a glacial event involving northward ice flow across Hudson Strait and large-magnitude meltwater drainage across Meta Incognita Peninsula at around 8.9 to 8.4 C-14 kyr BP. Through airphot o interpretation and field inspection of key sites we mapped the glacial ge omorphology of interior Meta Incognita Peninsula, the postulated terminal z one for northward expansion of ice from Quebec-Labrador during the Noble In let advance. A 170-km-long zone of glaciofluvial canyons, washing zones and boulder deltas was traced from Shaftesbury Inlet to Henderson Inlet. This zone reflects initial drainage across Meta Incognita Peninsula at > 520 m e levation, followed by ice marginal drainage at progressively lower levels a long the southern slope of the peninsula. The ice marginal outline required to explain the glaciofluvial zone is compatible with northward-trending st riae previously reported from the southern coast of Meta Incognita Peninsul a. A very large flux of meltwater across Meta Incognita Peninsula probably occurred because eastward supraglacial drainage on ice in Hudson Strait was temporarily impeded and steered northward by a raised ice surface level in outer Hudson Strait, induced by an enhanced outflow of ice from Ungava Bay .