Examination of the interplay between glacial processes and exhumation in the Saint Elias Mountains, Alaska
Rachel M. Headley et al., Dept. of Earth and Space Sciences, University of Washington, Seattle, Washington 98195-1310, USA. Posted online 5 Feb. 2013; http://dx.doi.org/10.1130/GES00810.1.
The Saint Elias Range in southeast Alaska is a tectonically active and heavily glaciated coastal mountain system. In this study, Rachel Headley and colleagues review and combine glaciology and thermochronology data from the largest glacier systems in the region, the Seward-Malaspina and the Bagley-Bering-Tana. These datasets record the glacial flow, the hydrological system, and the exhumation of the bedrock under the ice. The combined datasets reveal that the two glacier systems, despite close proximity and similar size, show very different patterns of erosion and sediment transport. To fully understand this difference, says Headley, it is necessary to take into account glacier-specific properties and processes, such as subglacial water flow, surging of the glaciers, and bedrock topography and structural setting. This paper is part of the "Neogene Tectonics and Climate-Tectonic Interactions in the Southern Alaskan Orogen" series.
Interpretation of gravity and magnetic data and development of 2D cross-sectional models for the Border Ranges fault system, south-central Alaska
Niti Mankhemthong et al., Dept. of Geological Sciences, University of Texas at El Paso, El Paso, Texas 79968, USA. Posted online 5 Feb. 2013; http://dx.doi.org/10.1130/GES00833.1.
Extensive glacial cover and lack of dense geophysical data within the Cook Inlet basi
|Contact: Kea Giles|
Geological Society of America