A lab exercise focusing on exploring the nuances of retrieving and analyzing data from online open-source geochemical repositories. I use this handout in my petrology courses. To be submitted to the “The On the Cutting Edge: Exemplary Reviewed Activity Collection” maintained by the NAGT.

The handout was made with rmarkdown and paged.js. If you like the style of this handout, you can find a template here with some examples.

Figure: Problem setup. Hint: you will need to use the trig functions (sine, cosine, and/or tangent) to solve for the vertical subduction rate. After Plank & Manning (2019).