Analysis of rocks from Shackleton Range, supplement to: Höfle, Hans-Christian; Buggisch, Werner (1995): Glacial geology and petrography of erratics in the Shackleton Range, Antarctica. Polarforschung, 63(2/3), 183-201

Studies were made of the glacial geology and provenance of erratic in the Shackleton Range during the German geological expedition GEISHA in 1987/88, especially in the southern and northwestern parts of the range. Evidence that the entire Shackleton Range was once overrun by ice from a southerly to...

Full description

Bibliographic Details
Main Authors: Höfle, Hans-Christian, Buggisch, Werner
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 2011
Subjects:
Geological sample
Filchner Ice Shelf
Pensacola Mountains
Ross Sea
Shackleton
Shackleton Range
Slessor
Slessor Glacier
Weddell
Weddell Sea
Whichaway Nunataks
Antarc*
Antarctica
Ice Sheet
Ice Shelf
Online Access:https://dx.doi.org/10.1594/pangaea.767443
https://doi.pangaea.de/10.1594/PANGAEA.767443
Description
Summary:Studies were made of the glacial geology and provenance of erratic in the Shackleton Range during the German geological expedition GEISHA in 1987/88, especially in the southern and northwestern parts of the range. Evidence that the entire Shackleton Range was once overrun by ice from a southerly to southeasterly direction was provided by subglacial erosional forms (e.g. striations, crescentic gouges, roches moutonnées) and erratics which probably orriginated in the region of the Whichaway Nunataks and the Pensacola Mountains in the southern part of the range. This probably happened during the last major expansion of the Anarctic polar ice sheet, which, on the basis of evidence from other parts of the continent, occurred towards the end of the Miocene.Till and an area of scattered erratics were mapped in the northwestern part of the range. These were deposited during a period of expansion of the Slessor Glacier in the Weichselian (Wisconsian) glacial stage earlier. This expansion was caused by blockage of the glacier by an expanded Filchner ice shelf which resulted from the sinking of the sea level during the Pleistocene, as demonstrated by geological studies in the Weddell Sea and along the coast of the Ross Sea. Studies of the erratics at the edges of glaciers provided information about rock concealed by the glacier.

Similar Items