نتایج جستجو برای: glacial geology
تعداد نتایج: 21695 فیلتر نتایج به سال:
In the previous publication «Geography in Switzerland» in Geographica Helvetica 1980, Vol. 35, No 5, we summarised the results of research on the paleogeographical reconstruction of late glacial stages in the Valais Alps (Winistörfer 1980). This field of research was the main thrust of physical geography at the University of Lausanne at the end of the 1970s and supported by «Les amis du quatern...
The Pluto system was recently explored by NASA's New Horizons spacecraft, making closest approach on 14 July 2015. Pluto's surface displays diverse landforms, terrain ages, albedos, colors, and composition gradients. Evidence is found for a water-ice crust, geologically young surface units, surface ice convection, wind streaks, volatile transport, and glacial flow. Pluto's atmosphere is highly ...
The valley of Bishop Creek, which drains part of the eastern fl ank of the Sierra Nevada, California, contains an unusually well-preserved set of middle to late Quaternary moraines. These deposits have been mapped by previous investigators, but they have not been quantitatively dated. We used the accumulation of cosmogenic 36Cl to assign a chronology to the maximal glacial positions mapped in t...
D URING the Wisconsin glaciation the present land areas of the coastal regions of Alaska bordering the Gulf of Alaska were virtually completely overridden by ice. The now existing flora and fauna of the region have presumably become established in the 10,000 years since the recession of the ice. Swarth discussed the origins of the fauna of the “Sitkan District’’ in 1936, and since then addition...
Introduction: Fan-shaped deposits (FSD) extending to the NW of the Tharsis Montes on Mars (Fig. 1) are the remnants of Amazonian-aged, cold-based, tropical mountain gla-ciations [1-5]. Geomorphological analyses of the facies within the deposits have revealed a number of ice-related features including moraines and sublimation till [1-5], as well as subglacial volcanic features [6]. Atmospheric m...
Viscous Flow Features (VFF) are widespread in the martian mid-latitudes and indicative of near-surface ice deposits. Their distribution morphology hint at regional history deposition ablation, as well changes surface temperature. Here we interrogate deformation a type VFF, Lobate Debris Apron (LDA), located eastern Hellas region, from its morphology, discussing implications it poses for interna...
Nearly 25% of all lakes on earth are located at high latitudes. These formed by a combination thermokarst, glacial, and geological processes. Evidence suggests that the origin periglacial lake formation may be an important factor controlling likelihood to drain. However, geospatial data regarding spatial distribution these dominant Arctic subarctic limited or do not exist. Here, we use lake-spe...
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