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Articles | Volume 17, issue 2
Articles | Volume 17, issue 2
https://doi.org/10.5194/se-17-225-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-17-225-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 17, issue 2
Research article
 | 
06 Feb 2026
Research article |  | 06 Feb 2026

Mineralogic controls on fault displacement-height relationships

Adam J. Cawood, David A. Ferrill, Kevin J. Smart, and Michael J. Hartnett

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Short summary
We studied faults in Utah to understand how rock type controls fault dimensions. Using photogrammetry, field mapping, and mineral data, we found faults grow differently in weak and strong rocks because of variable mineralogy. For equivalent displacements, faults tend to be shorter in clay-rich layers and taller in rocks containing strong minerals. We built a model to predict hidden fault height from mineralogy and applied it to seismic data, showing fault dimensions are often underestimated.
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