Contact: Carol Hughes
carol.hughes@asu.edu
480-965-6375
Arizona State University

ASU Student Yun Duan

Caption: Arizona State University doctoral student Yun Duan prepares a sample of ancient rock -- late Archean Mt. McRae Shale -- for mass spectrometric analysis of its metal content. She works with an inductively coupled plasma mass spectrometer in ASU's W.M. Keck Foundation Laboratory for Environmental Biogeochemistry.

Credit: Arizona State University photo by Tim Trumble

Usage Restrictions: Photo credit to photographer and Arizona State University.

Related news release: Researchers detect hint of oxygen 50 to 100 million years earlier than first believed