MEDIA RELATIONS OFFICE
JET PROPULSION LABORATORY
CALIFORNIA INSTITUTE OF TECHNOLOGY
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
PASADENA, CALIF. 91109. TELEPHONE (818) 354-5011
http://www.jpl.nasa.gov

Photo Caption                                Img0083

Close-up of the boundary between the two fluidized ejecta
lobes, which forms a horizontal wavy line near the center 
of the photo. This wavy line is a shear zone, or a surface 
upon which the upper flow slid along in a gliding motion.  
Note cobble size ejecta rock fragments.  Hammer is about 
30 cm (12 in) tall.