Date of Award

Fall 12-12-2020

Degree Type


Degree Name

Master of Science - Geology



First Advisor

Liane Stevens

Second Advisor

Melinda Faulkner

Third Advisor

Joseph Musser

Fourth Advisor

R. LaRell Nielson


The Mesoproterozoic intrusive contact between the ~1.1 Ga anorogenic Town Mountain Granite and the ~1.3 Ga Packsaddle Schist is a gradational contact exhumed within the Llano uplift. This contact is exposed along the southeastern margin of the Enchanted Rock batholith in central Texas. Field observations, hand sample and thin section petrography, and handheld X-ray fluorescence analysis of hand samples were used to characterize the gradational nature of this contact at multiple scales. The style of gradation between the Town Mountain Granite and Packsaddle Schist varies throughout the study area, containing both injection and permeation. The complex relationships observed at the contact possibly resulted from variations in temperature conditions along the contact at different stages of the emplacement.

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Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

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Geology Commons



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