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Research Article

Revised Lithostratigraphy of the Sonsela Member (Chinle Formation, Upper Triassic) in the Southern Part of Petrified Forest National Park, Arizona

  • Jeffrey W. Martz mail,

    typothorax@gmail.com

    Affiliation: Division of Resource Management, Petrified Forest National Park, Petrified Forest, Arizona, United States of America

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  • William G. Parker

    Affiliation: Division of Resource Management, Petrified Forest National Park, Petrified Forest, Arizona, United States of America

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  • Published: February 19, 2010
  • DOI: 10.1371/journal.pone.0009329
  • Published in PLOS ONE

About the Authors

Jeffrey W. Martz, William G. Parker
Division of Resource Management, Petrified Forest National Park, Petrified Forest, Arizona, United States of America

Corresponding Author

Email: typothorax@gmail.com

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JWM. Performed the experiments: JWM WGP. Analyzed the data: JWM WGP. Wrote the paper: JWM.