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New geology research explores intriguing questions
Date:12/18/2013

ouisiana formed over night on 3 August 2012, startling local residents who had been reporting small seismic events and bubbling in the bayous over the prior few weeks. The sinkhole developed above the collapsing sidewall of Texas Brine's Oxy #3 cavern in the Napoleonville Salt Dome, with an initial size of ~1 hectare. As the sinkhole continues to enlarge, engulfing more of the local land and trees, the community of Bayou Corne is now largely abandoned. The JPL/NASA UAVSAR radar system has been collecting data over southeastern Louisiana since 2009 and analysis of the data acquired over Bayou Corne reveal surface deformation of up to 26 cm that occurred at least one month prior to sinkhole formation. Significantly, no deformation is seen prior to June 2011, in accord with residents' observations of unusual activity starting around June 2012. These observations, and other radar interferometric observations of sinkholes, demonstrate that radar remote sensing data collected operationally for hazards monitoring could identify some at-risk areas prior to surface collapse. Airborne and spaceborne radar can rapidly survey large areas, measuring motion across the entire area, complementing surface survey methods that provide precise information about movement at a single location.


Exceptional preservation of angiosperm markers in Miocene and Eocene ambers
Suryendu Dutta et al., Dept. of Earth Sciences, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India, s.dutta@iitb.ac.in. Posted online ahead of print on 13 Dec. 2013; http://dx.doi.org/10.1130/G34975.1.

The traditional organic geochemical view suggests that polar triterpenoids are degraded easily during fossilization of organic matter. For the first time, a team from the Indian Institute of Technology Bombay demonstrates that oxygenated dammarane-type (a tetracycl
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Contact: Kea Giles
kgiles@geosociety.org
Geological Society of America
Source:Eurekalert  

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