Large‐scale troughs on Vesta: A signature of planetary tectonics

  title={Large‐scale troughs on Vesta: A signature of planetary tectonics},
  author={Debra L. Buczkowski and D. Y. Wyrick and Kaushik Iyer and Eliezer G. Kahn and Jennifer E. C. Scully and Andreas Nathues and R. W. Gaskell and Thomas Roatsch and Frank Preusker and P. M. Schenk and Lucille Le Corre and Vishnu Reddy and R. Aileen Yingst and S. C. Mest and D. A. Williams and William Brent Garry and O. S. Barnouin and Ralf Jaumann and C. A. Raymond and C. T. Russell},
  journal={Geophysical Research Letters},
Images of Vesta taken by the Dawn spacecraft reveal large‐scale linear structural features on the surface of the asteroid. We evaluate the morphology of the Vesta structures to determine what processes caused them to form and what implications this has for the history of Vesta as a planetary body. The dimensions and shape of these features suggest that they are graben similar to those observed on terrestrial planets, not fractures or grooves such as are found on smaller asteroids. As graben… 

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