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cia nta drill cores (sites 1099 and 1098) that together recovered over 150 m of latest Pleistocene and Holocene sediment. We divide this tal shelf that served as the platform for growth and distinct zones of accelerated flow, produced by the convergence of tributary glaciers. (Canals et al., 2000, i...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.682.5479 http://www.marine-geo.org/link/data/field/NBPalmer/NBP0107/reference/PalmerDeepGeomor.pdf |
| Summary: | cia nta drill cores (sites 1099 and 1098) that together recovered over 150 m of latest Pleistocene and Holocene sediment. We divide this tal shelf that served as the platform for growth and distinct zones of accelerated flow, produced by the convergence of tributary glaciers. (Canals et al., 2000, ilbert et al., 2003; Geomorphology xx (2005) + modelexpansion of an ice sheet during the Last Glacial Max-region of the continental shelf into three zones based upon mega- to meso-scale bathymetric features and emphasize that all three were part of one glacial outlet during the most recent period of glaciation. These zones include from inner shelf to outer shelf: the Palmer Deep basin, the Palmer Deep Outlet Sill and the Hugo Island Trough. Specific seafloor features associated with these zones include: relict terraces, sub-glacial lake deltas, channels and levees, debris slopes, spindle out bed forms, mega-scale glacial lineations, morainal banks, and bank breach points. The origin of many of these features can be linked to the development of a sub-glacial lake basin within the Palmer Deep during or prior to MIS-2, its subsequent drainage, and recession of the Palmer Deep ice stream system. This sub-glacial lake system is reconstructed at the head of a major paleo-ice stream. |
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