Analysis of rocks from Shackleton Range

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. […]

1987/1988年德国GEISHA地质考察队针对沙克尔顿山脉（Shackleton Range）开展了冰川地质与漂砾（erratic）物源研究，考察重点覆盖该山脉的南部与西北部区域。冰下侵蚀地貌（如冰川擦痕、新月形刻槽、羊背石（roches moutonnées））以及大概率源自该山脉南部威奇韦冰原岛峰（Whichaway Nunataks）与彭萨科拉山脉（Pensacola Mountains）区域的漂砾，为整个沙克尔顿山脉曾遭受来自南至东南方向冰川侵袭这一论断提供了实证支撑。这一冰川作用大概率发生于南极极地冰盖末次大规模扩张时期；依据南极大陆其他区域的相关科考证据，此次冰盖扩张发生于中新世末期。[…]