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Geosphere adds 2 new special issue themes
Date:4/1/2013

l alteration trend is also influenced by the contribution of volcanogenic sediments derived from the reworking of silica-rich pyroclasts from earlier volcanic activity.


Estimation of submarine mass failure probability from a sequence of deposits with age dates
Eric L. Geist et al., U.S. Geological Survey, 345 Middlefield Road, MS 999, Menlo Park, California 94025, USA. Issue: April 2013. Originally posted online 18 March 2013; http://dx.doi.org/10.1130/GES00829.1. Themed issue: Exploring the Deep Sea and Beyond.

Submarine landslides present a significant hazard to communications cables, offshore energy development, and to coastal regions via the generation of tsunamis. One of the critical components of assessing hazards posed by submarine landslides is determining the probability of occurrence. For an empirical determination of probability, there are very few places in the world where a sequence of submarine landslides have been individually dated. However, in 2005, cores from two Integrated Ocean Drilling Project (IODP) sites in the Ursa Basin, northern Gulf of Mexico penetrated through a sequence of deposits left by landslides. This study develops a methodology to estimate the probability of submarine landslides from a sequence of dated deposits, such as those found in the Ursa Basin.


Contrast in the process response of stacked clinothems to the shelf-slope rollover
George E.D. Jones et al., Stratigraphy Group, Department of Earth, Ocean and Ecological Sciences, University of Liverpool, Liverpool L69 3GP, UK. Issue: April 2013. Originally posted online 6 March 2013; http://dx.doi.org/10.1130/GES00796.1.

The shelf edge rollover represents a critical zone in understanding the timing and processes involved in the transfer of sediment and organic carbon from cont
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Contact: Kea Giles
kgiles@coyotesong.com
Geological Society of America
Source:Eurekalert

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