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Welcome! Among other pursuits, I am a geologist. I study modern and ancient mountain belts using field, analytical, and modelling work. My expertise is in hard-rock geochemistry, geochronology, and petrology, which I use to probe the history of Earth's lithosphere.

One research direction I am most excited about is "geochemical signal processing": using statistical tools (PCA, ICA, cluster analysis) to isolate distinct trends from large geochemical datasets, including those I collect (e.g., by LA-ICPMS) or from compiled literature data (e.g., GEOROC). These types of analyses are applicable to a wide range of geologic data. I also use novel, high-resolution laser-ablation techniques to understand rock thermal and chemical histories from single crystals. Recently, I have combined these approaches with geophysical data to understand the composition and thermal state of cratonic mantle lithosphere.

I am currently an Assistant Research Professor at Penn State, which primarily involves running the "LionChron" LA-ICPMS laboratory and includes working closely with Drs. Jesse Reimink, Andy Smye, and Maureen Feineman. Pennsylvania has a rich natural and cultural history, and in my spare time, I investigate local geology, hikes, birds, and mushrooms.

Please feel free to reach out and discuss anything you see here at jmgarber [at] psu [dot] edu.