Donna Whitney

Field Guide to the Dutchess County, NY, Barrovian Sequence part of Cutting Edge:Petrology:Teaching Examples
This is a field guide used for a field trip to explore the Barrovian sequence in Dutchess County, NY.

Calculating Pressures and Temperatures of Petrologic Events: Geothermobarometry part of Cutting Edge:Petrology:Teaching Examples
In this lab exercise, students examine one or more metamorphic rocks and use various approaches to estimating and calculating the pressure-temperature conditions at which the rocks equilibrated. The exercise involves hand sample description, petrography, interpretation of phase diagrams, and calculations of a phase diagram or P-T conditions from given equations.

"Classical" Thermobarometry part of Integrating Research and Education:Teaching Phase Equilibria
Donna Whitney, University of Minnesota Thermobarometry is the quantitative determination of the temperature and pressure at which a metamorphic or igneous rock reached chemical equilibrium. The term ...

P-T-t Paths part of Integrating Research and Education:Teaching Phase Equilibria
Donna Whitney, University of Minnesota What is a P-T-t path? Metamorphism is a dynamic process, involving changes in temperature ± pressure through time. The pressure (P) - temperature (T) - time (t) path of ...