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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

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.