نتایج جستجو برای: glacial valley

تعداد نتایج: 37847  

Journal: :Molecular ecology 2013
Paul F Gugger Makihiko Ikegami Victoria L Sork

Phylogeography and ecological niche models (ENMs) suggest that late Quaternary glacial cycles have played a prominent role in shaping present population genetic structure and diversity, but have not applied quantitative methods to dissect the relative contribution of past and present climate vs. other forces. We integrate multilocus phylogeography, climate-based ENMs and multivariate statistica...

2009
Caleb I. Fassett James L. Dickson James W. Head Joseph S. Levy David R. Marchant

Abundant evidence exists for glaciation being an important geomorphic process in the mid-latitude regions of both hemispheres of Mars, as well as in specific environments at near-equatorial latitudes, such as along the western flanks of the major Tharsis volcanoes. Detailed analyses of glacial landforms (lobate-debris aprons, lineated valley fill, concentric crater fill, viscous flow features) ...

Journal: :Journal of Maps 2021

Detailed geomorphological mapping of ice-related and post-glacial landforms is widely used to explain past glacial fluctuations dynamics. Here we present the first detailed geomorpholog...

Journal: :Communications earth & environment 2021

Abstract The periodic input of meltwater into the ocean from a retreating Laurentide Ice Sheet is often hypothesized to have weakened Atlantic meridional overturning circulation (AMOC) and triggered several cold periods during last deglaciation (21,000 8,000 years before present). Here, we use numerical model investigate whether Intra-Allerød Cold Period was by drainage Glacial Lake Iroquois, ~...

2010
David M.H. Baker James W. Head David R. Marchant

A variety of Late Amazonian landforms on Mars have been attributed to the dynamics of ice-related processes. Evidence for large-scale, mid-latitude glacial episodes existing within the last 100 million to 1 billion years on Mars has been presented from analyses of lobate debris aprons (LDA) and lineated valley fill (LVF) in the northern and southern mid-latitudes. We test the glacial hypothesis...

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