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Geology spans the minute and gigantic, from skeletonized leaves in China to water on mars
Date:4/3/2014

modern-day outlet glaciers (more than 100 m/yr), but there were episodes of rapid retreat (up to ~150 m/yr). More significantly, phases of rapid retreat were not synchronous between neighboring glaciers and most occurred irrespective of any atmospheric warming. Rather, the highest retreat rates occurred in deep, wide fjords. This implies that if scientists are to accurately predict the response of modern-day outlet glaciers over the next few centuries, there is an urgent need to measure the landscapes currently under the ice.


Miocene burial and exhumation of the India-Asia collision zone in southern Tibet: Response to slab dynamics and erosion
B. Carrapa et al., Department of Geosciences, University of Arizona, Tucson, Arizona 85721, USA. Published online 31 Mar. 2014; http://dx.doi.org/10.1130/G35350.1.

This manuscript presents the first multi-dating study of the Indus-Yarlung collision zone in southern Tibet. This study includes data from the Oligo-Miocene Kailas Formation and underlying Gangdese batholith rocks preserved along a ~600 km stretch of the collision zone. The IYS collision zone forms the boundary between the Indian and Asian plates, and marks the location of the greatest intercontinental collision during the past 300 million years of Earth history. Major mountain ranges flanking this collision zone have high relief and elevation, intense deformation, active seismicity, and thick crust. Although the region has been subjected to intense deformation leading to high elevation and great crustal thickness, the Kailas Formation contains evidence for crustal extension and deposition at relatively low elevation under a humid-tropical climate. The data presented here by B. Carrapa and colleagues document deep burial and subsequent high-magnitude exhumation of the Indus-Yarlung collision zone between 23 and 17 million years ago, which are best explained
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Contact: Kea Giles
kgiles@geosociety.org
Geological Society of America
Source:Eurekalert  

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Geology spans the minute and gigantic, from skeletonized leaves in China to water on mars
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