Lake-ice conveyor deposits: Geomorphology, sedimentology, and importance in reconstructing the glacial history of the Dry Valleys

Soil phosphorus cycling in an Antarctic polar desert

“…During the last glacial maximum, ice from the Ross Sea advanced westward into Taylor Valley, forming proglacial Lake Washburn . Icebergs calving from the snout were carried away from the glacier within the lake ice, eventually subliming and depositing their englacial till on the lake bottom (Hall et al, , 2006. Ross Sea drift can be distinguished lithologically from Taylor II drift, as it contains kenyte and types of basalt that are not found in the vicinity of the Taylor Glacier and have most likely been transported westward from Ross Island .…”

Holocene relative sea-level change and deglaciation on Alexander Island, Antarctic Peninsula, from elevated lake deltas

“…We propose that the AL (and ML) elevated deltas are the end product of glaciofluvial deposition from the catchment and reworking of sediment transported across the lake by lake-ice conveyors (Hall et al, 2006;Smith et al, 2006). After formation, the AL (and ML) elevated deltas were abandoned by changes in local RSL, resulting from LGM deglaciation and isostatic rebound of Alexander Island.…”

“…Due to the absence of a continuous bedrock barrier, GVI-IS penetrates into the northern part of the lake basin forming an iceshelf tongue, which deposits sediments into the lake via an ice conveyor, and into ice push deposits formed by the tidal pressure ridges on the lake shore (Sugden and Clapperton, 1981;Hall et al, 2006;Smith et al, 2006). These deposits can be coarse gravel to boulder in size.…”

The glacial geomorphology of the Lago Buenos Aires and Lago Pueyrredón ice lobes of central Patagonia

“…Low-relief hummock chains are interpreted as moat line ridges deposited at the margins of a small ice-contact lake ice (cf. Hall, Hendy, & Denton, 2006). Inferred moat line ridges occur outside the limits of hummocky terrain, and along the ice-contact face of prominent sharp-crested ridges.…”

“…Given the ice-marginal lacustrine context and their morphological nature, we interpret these landforms as moat lines of ice-rafted debris let down through the unfrozen margins of an ice-contact lake (cf. Hall, Hendy, Denton, 2006). Sedimentological analyses are needed to test this interpretation.…”