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Record #164657:

Distribution of glacial geomorphic features on the Antarctic continental shelf and correlation with substrate: implications for ice behavior / J.S. Wellner, A.L. Lowe, S.S. Shipp, J.B. Anderson.

Title: Distribution of glacial geomorphic features on the Antarctic continental shelf and correlation with substrate: implications for ice behavior / J.S. Wellner, A.L. Lowe, S.S. Shipp, J.B. Anderson.
Author(s): Wellner, J. S.
Lowe, A. L.
Shipp, S. S.
Anderson, J. B.
Date: 2001.
In: Journal of Glaciology. (2001.), Vol. 47(158) (2001)
Abstract: Presents geophysical and sedimentological observations from continental shelf offshore of each of the major ice-drainage outlets between north Victoria Land and the Antarctic Peninsula. Focuses on the large glacial troughs that occur in each drainage area. Includes seismic imaging of the substrate over which the ice flowed, high resolution seismic imaging of the upper bed, multibeam swath bathymetry imaging of large geomorphic features on the shelf, deep-tow side- scan sonar imaging of smaller bedforms, and geological sampling of the bed. Typical distribution of geomorphic features includes erosional features such as grooves or roches moutonnées on the inner shelf, drumlins in the transitional zone between crystalline and sedimentary substrates, 'mega-scale lineations' (flutes up to 70 km long thought to have formed in deforming-till layers beneath rapidly flowing ice) on the outer shelf, and gullies on the slope. Correlates occurrence of drumlins with onset of ice-stream flow. Reports correlations between geomorphic features and substrate geology and their implications for the control the latter may exert on ice behaviour.
Notes:

Journal of Glaciology. Vol. 47(158) :397-411 (2001).

Keywords: 551.33 -- Glacial geology.
551.324 -- Land ice.
551.324.5 -- Land ice, flow.
551.462.32 -- Continental shelves.
551.331.5 -- Glacial erosion and protection. Sub-glacial topography.
551.332.54 -- Drumlins.
551.331.54 -- Roches moutonnees.
550.34 -- Seismology.
E7 -- Glaciology: glacial geology and ice ages.
(*7) -- Antarctic regions.
SPRI record no.: 164657

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245 00 ‡aDistribution of glacial geomorphic features on the Antarctic continental shelf and correlation with substrate :‡bimplications for ice behavior /‡cJ.S. Wellner, A.L. Lowe, S.S. Shipp, J.B. Anderson.
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500 ## ‡aJournal of Glaciology. Vol. 47(158) :397-411 (2001).
520 3# ‡aPresents geophysical and sedimentological observations from continental shelf offshore of each of the major ice-drainage outlets between north Victoria Land and the Antarctic Peninsula. Focuses on the large glacial troughs that occur in each drainage area. Includes seismic imaging of the substrate over which the ice flowed, high resolution seismic imaging of the upper bed, multibeam swath bathymetry imaging of large geomorphic features on the shelf, deep-tow side- scan sonar imaging of smaller bedforms, and geological sampling of the bed. Typical distribution of geomorphic features includes erosional features such as grooves or roches moutonnées on the inner shelf, drumlins in the transitional zone between crystalline and sedimentary substrates, 'mega-scale lineations' (flutes up to 70 km long thought to have formed in deforming-till layers beneath rapidly flowing ice) on the outer shelf, and gullies on the slope. Correlates occurrence of drumlins with onset of ice-stream flow. Reports correlations between geomorphic features and substrate geology and their implications for the control the latter may exert on ice behaviour.
650 07 ‡a551.33 -- Glacial geology.‡2udc
650 07 ‡a551.324 -- Land ice.‡2udc
650 07 ‡a551.324.5 -- Land ice, flow.‡2udc
650 07 ‡a551.462.32 -- Continental shelves.‡2udc
650 07 ‡a551.331.5 -- Glacial erosion and protection. Sub-glacial topography.‡2udc
650 07 ‡a551.332.54 -- Drumlins.‡2udc
650 07 ‡a551.331.54 -- Roches moutonnees.‡2udc
650 07 ‡a550.34 -- Seismology.‡2udc
650 07 ‡aE7 -- Glaciology: glacial geology and ice ages.‡2local
651 #7 ‡a(*7) -- Antarctic regions.‡2udc
700 1# ‡aWellner, J. S.
700 1# ‡aLowe, A. L.
700 1# ‡aShipp, S. S.
700 1# ‡aAnderson, J. B.
773 0# ‡7nnas ‡tJournal of Glaciology. ‡gVol. 47(158) (2001) ‡wSPRI-20534
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