Geosciences Rock Garden | Trinity University
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The Trinity Geosciences rock garden, located south of Marrs McLean Science Hall of CSI, was established to commemorate and honor the memory of Donald McGannon, Jr., founder of Trinity’s Geosciences department, and to provide the campus and community with a beautiful, educational landmark in the heart of Trinity’s campus.

close-up of colored rocks

The garden contains more than 30 significant rocks, such as the Town Mountain Granite from the Texas Hill Country, stromatolitic limestone from the Cambrian Wilberns Formation in Mason, Texas, speleothems from caves within the Glen Rose limestone, north of San Antonio, and an extraordinary variety of ancient, Precambrian rocks from the upper Midwest.

View the map of the garden (PDF).
Learn more about the people who made the rock garden possible.

The rock garden and this website inform visitors about a range of geologic processes associated with rock formation. Trinity students can use the garden to learn more about Earth materials, and visitors to Trinity’s campus can learn, study, and relax beneath the shade of the garden’s mature live oaks.

Students working on building rock garden