نتایج جستجو برای: glacial valley

تعداد نتایج: 37847  

2010
Dirk Scherler Bodo Bookhagen Manfred R. Strecker Dylan Rood

Glacial chronologies from the Himalayan region indicate various degrees of asynchronous glacial behavior. Part of this has been related to different sensitivities of glaciers situated in contrasting climatic compartments of the orogen, but so far field data in support for this hypothesis is lacking. Here, we present a new 10Be-derived glacial chronology for the upper Tons valley in western Garh...

2015
A. Bradford

This investigation considers existing literature on the Cordillera Blanca mountain range in Peru as an analogue for glacial retreat in the Quilcayhuanca Valley watershed. This watershed provides much of the water resources for the city of Huaraz, particularly during the dry season. Therefore, it is important to predict future glacial retreat in this valley, in order for this community to adapt ...

Journal: :geopersia 0
babak ebrahimi ministries of energy,isfahan regional water company abdollah seif geographic sciences and planning faculty, university of isfahan,

equilibrium-line altitudes (elas) of former glaciers in the zardkuh mountain of the zagros mountain range were reconstructed from glacial-geologic data on former ice limits by using various methods. in the study area various types of glacial landforms such as outwash fans, moraines and well developed glacial cirques are observed. the results suggest that ela were depressed 1433 m below to prese...

2005
Matthew E. Clapham Frank A. Corsetti

Neoproterozoic sedimentary successions worldwide display evidence for multiple low-latitude glacial events and continental rifting episodes related to the fragmentation of the supercontinent Rodinia. In Death Valley, eastern California, these events are represented by two intervals of glacial diamictite and two episodes of synsedimentary extensional faulting in the Kingston Peak Formation. Deep...

2006
D. R. Marchant

Introduction: Terrestrial cold-based glacial analogs [1,2] have recently been applied to the analysis of fan-shaped deposits on the NW flanks of the Tharsis Montes and Olympus Mons, interpreting them to represent extensive tropical mountain glaciers formed by enhanced snow and ice deposition during periods of high obliquity in the Amazonian [3-8]. Additional Earth glacial analogs have been used...

2013
Pietro Sternai Frédéric Herman Pierre G. Valla

The present-day topography of the European Alps shows evidence of intense glacial reshaping. However, significant questions regarding Alpine landscape evolution during glaciations still persist. In this study, we focus on the Rhône valley (Swiss Alps), and use a numerical model to estimate patterns and magnitudes of glacial erosion. Comparing modeling results on a reconstructed pre-glacial topo...

2014
Lu Xu Hao Wang Qiong La Fan Lu Kun Sun Yang Fang Mei Yang Yang Zhong Qianhong Wu Jiakuan Chen H. John B. Birks Wenju Zhang

Microrefugia at high altitudes or high latitudes are thought to play an important role in the post-glacial colonization of species. However, how populations in such microrefugia have responded to climate changes in alternating cold glacial and warm interglacial stages remain unclear. Here we present evidence to indicate the Rongbuk Valley of the Mt. Qomolangma (Mt. Everest) area, the highest re...

2006
Simon H. Brocklehurst Kelin X. Whipple

The relative rates of erosion by rivers and glaciers, and the topographic effects of these two different styles of erosion, remain outstanding problems in geomorphology. We use a quantitative description of local fluvial landscapes to estimate how glaciated landscapes might look now had glaciers not developed. This indicates the landscape modification attributable to glacial erosion. We present...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2014
Henrik Rother David Fink James Shulmeister Charles Mifsud Michael Evans Jeremy Pugh

Recent debate on records of southern midlatitude glaciation has focused on reconstructing glacier dynamics during the last glacial termination, with different results supporting both in-phase and out-of-phase correlations with Northern Hemisphere glacial signals. A continuing major weakness in this debate is the lack of robust data, particularly from the early and maximum phase of southern midl...

Journal: Geopersia 2016

Equilibrium-line altitudes (ELAs) of former glaciers in the Zardkuh Mountain of the Zagros Mountain Range were reconstructed from glacial-geologic data on former ice limits by using various methods. In the study area various types of glacial landforms such as outwash fans, moraines and well developed glacial cirques are observed. The results suggest that ELA were depressed 1433 m below to prese...

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