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JET PROPULSION LABORATORY
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http://www.jpl.nasa.gov

Photo Caption                                544_59  

Jan Smit (left) and Kevin Pope (right) examining the two 
fluidized ejecta flows near Alvaro Obregon, Quintana Roo, 
Mexico.  Horizontal wavy line across center of cliff face 
marks the shear zone between the two flows.  January 1998.