| Title | Bedrock response to Llanquihue Holocene and present-day glaciation in southernmost South America |
| |
| Author | Ivins, E R; James, T S |
| Source | Geophysical Research Letters vol. 31, no. 24, L24613, 2004, 4 pages, https://doi.org/10.1029/2004GL021500  Open Access |
| Year | 2004 |
| Alt Series | Geological Survey of Canada, Contribution Series 2004227 |
| Publisher | Wiley-Blackwell |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Area | southern South America; Puerto Guadal; Villa O'Higgins; Punta del Lago; Puerto Coig; Puerto natales; Chile Chico; El Calafete; Ushuaia; Chile; Argentina |
| Lat/Long WENS | -75.0000 -65.0000 -45.0000 -56.0000 |
| Subjects | geophysics; surficial geology/geomorphology; tectonics; glaciology; glacial history; deglaciation; glaciers; crustal uplift; glacial tectonics; isostasy; isostatic rebound; rheology; lithosphere;
crustal thickness; mantle; viscosity; geodesy; Holocene; Pleistocene; Neogene; Little Ice Age; Phanerozoic; Cenozoic; Quaternary |
| Illustrations | graphs; sketch maps |
| Program | Natural Hazards and Emergency Response |
| Released | 2004 01 01 |
| Abstract | Modern geodetic techniques, such as precise Global Positioning System (GPS) measurements and high resolution space gravity mapping, make it possible to measure the present-day rate of viscoelastic
gravitational Earth response to present and past glacier mass change. Patagonia is a rapidly evolving glacial environment. Over the past decade, the local rate of surface stress unloading may be the largest anywhere on the planet. We compute the
present-day land uplift rate that could be observed using bedrock GPS measurements. The Little Ice Age (LIA) of the past half millennium generates large vertical rates since the underlying mantle material is likely to have anomalously low viscosity
owing to late-Neogene ridge subduction. |
| GEOSCAN ID | 216161 |
|
|