Dear Colleagues, We would like to invite you to submit abstracts to Theme Session T17 at the GSA Cordilleran Section Meeting<https://www.geosociety.org/GSA/GSA/Sections/cd/2025mtg/home.aspx?gad_source=1&gclid=Cj0KCQiAvvO7BhC-ARIsAGFyToXaZ_m0uBERkvdb2Av1fzFHsj78ehSs-YVdyi6BbSy712MXDp1F49oaAiM9EALw_wcB>, held in Sacramento, CA, from April 2–4, 2025. This session focuses on the structural and compositional development of plutons and batholiths. We encourage contributions from a broad range of perspectives, including tectonics, petrology, structural geology, and geochemistry. Below is the full session description: T17. Evolution of Plutons and Batholiths at Different Crustal Levels Why, when, and how do Cordilleran plutons and batholiths grow throughout the crustal column? This session examines the impact of magmatic and tectonic processes at different crustal levels on compositions, volumes, and growth rates of intrusions. We encourage contributions from various perspectives, including petrology and geochemistry, field studies, and tectonics. Abstracts are due January 28th at 11:59 PM, Pacific Time. You can submit abstracts here<https://gsa.confex.com/gsa/2025CD/cfp.cgi>. Best Regards, The Conveners Madeline Lewis (she/her) mlewis48@uwyo.edu University of Wyoming Ami Ward (she/her) ami.ward@unc.edu University of North Carolina at Chapel Hill