“ZirChron” — Virtual Zircon Analysis App
We provide a Student Exercise and Instructor Guide for use of the ZirChron app in exploring the criteria by which crystals from a zircon population are interrogated, the use of basic parametric statistics (ZirChron Stats Background) to establish the precision and accuracy of U-Pb zircon ages, and the strengths and weaknesses of different analytical techniques. The initial data set used in the app is from an Oligocene volcanic tuff of the John Day Formation in Oregon, however additional sample types and ages will be added as we collect them. We encourage users to customize the curriculum for particular classroom or on-line settings, and the open-source nature of the app allows customization with your own images and data sets for users familiar with HTML. We welcome any comments, feedback, or shared innovations in curriculum—send us an email.