Aaron Cavosie

What can zircons tell us about the Early Earth? part of Early Earth:Activities
This image shows an array of Jack Hill zircons arranged on a piece of tape prior to casting in epoxy. Details Students create U-Pb concordia plots in Excel to experience the methods used to date the worlds oldest ...

When did oceans form on Earth? What evidence is preserved in the rock record? part of Early Earth:Key Questions about the Early Earth
This educational webpage addresses the timing of ocean formation on Earth and the geological evidence preserved in the rock record, focusing on analysis of Isua banded iron formations and oxygen isotope ratios in 4.4-billion-year-old detrital zircons to infer early surface water, with implications for understanding early Earth conditions and teaching geoscience.