Aleisha JohnsonNSF EAR Postdoctoral Fellow

Research Focus:
Isotope geochemistry, petrology, paleoredox
Hinds 385


  • Ph.D. Geological Sciences, Arizona State University, 2020
  • B.S., Geology, University of Wisconsin - Eau Claire, 2014

Research Interests:

I am interested in understanding the rise of O2 in Earth's atmosphere, as well as the compositional evolution of Earth's continental crust. While both had profound consequences for Earth's sustained habitability, both are also poorly constrained, especially with regards to how crustal evolution may have driven or hindered atmospheric evolution. To better understand crustal evolution, I apply stable titanium (Ti) isotopes to modern magmatic environments to calibrate Ti isotopes as tracers of magmatic differentiation through time.