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The SEPM STRATA website is located at

The existing SEPM STRATA web site was originally designed and produced by Professor Christopher Kendall and Nassir Al Naji, then at the University of South Carolina. For several years the site was maintained and content was updated under their guidance. Upon Dr. Kendall's retirement as a Distinguished Emeritus Professor at University of South Carolina, the site was transferred to SEPM, underwent a significant redesign and was uploaded to server space at SEPM. In early 2019, Dr. Lesli Wood at the Colorado School of Mines has taken on the new role of Chief Editor of STRATA.

The continued developement and redesign of the website has been sponsored by:

Intended users of this site

Purpose of this site

Using a combination of linked text, images, and short movies this site is designed to help the above users gain an instant understanding of the principles of sequence stratigraphy and other aspects of sedimentary geology. Often persons exposed to this topic for the first time, even experienced sedimentary stratigraphers, are confused with the extensive terminology of this burgeoning science and the complex geometric response of the sedimentary record to changing rates of sedimentation and relative sea level (whether this latter is the product of world wide changes in sea level [eustasy], or vertical tectonic movement). This web site is designed to help navigate these common problems while helping improve the users understanding of the sedimentary section of the earths crust and the principles of this important earth science discipline. Materials at SEPM STRATA can be used (unless the material is specificially excluded) under the Creative Commons license:

Editorial Board

STRATA under SEPM overview has been working on updating and adding content to the STRATA site.

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