Continental delamination and mantle dynamics drive topography, extension and fluid discharge in the Apennines
Claudio Chiarabba and Giovanni Chiodini, Istituto Nazionale di Geofisica Vulcanologia, Sezione CNT, Rome 00143, Italy. Published online ahead of print on 16 April; http://dx.doi.org/10.1130/G33992.1.
In this study, Claudio Chiarabba and Giovanni Chiodini show that the evolution of the Apennines mountain belt is sustained by a low velocity anomaly in the upper mantle associated with sub-lithospheric mantle replacement after removal of rigid continental lithosphere. This process is accompanied by the discharge of deep fluids that favor the generation of large normal faulting earthquakes, like the 2009 L'Aquila event. Chiarabba and Chiodini propose that this process named "delamination" is responsible for the past million years of lithospheric evolution in the area.
Reach-scale river dynamics moderate the impact of rapid Holocene climate change on floodwater farming in the desert Nile
Mark G. Macklin et al., Institute of Geography and Earth Sciences, Aberystwyth University, Aberystwyth SY23 3DB, UK; and School of Environment and Development, University of Manchester, Manchester M13 9PL, UK. Published online ahead of print on 16 April; http://dx.doi
|Contact: Kea Giles|
Geological Society of America