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Results 61 - 70 of 438 matches
Rb-Sr isotope in-class exercise
This set of problems involves calculations of changes in radiogenic isotope ratios. It requires students to understand the concept of an isochron and how isotope ratios change (or do not change) during magma mixing ...
Properties of Rhyolite Magma
The purpose of the exercise is to acquaint igneous petrology students with properties of silicic magmas, and to emphasize the effect of water content on viscosity of silicic magmas. Students have to determine the ...
Flow of Andesite Lava
The purpose of the exercise is to familiarize igneous petrology students with flow properties of lava, especially viscosity, and to have them consider effects on viscosity due to temperature, crystallinity and ...
Batch and Rayleigh Decarbonation Modeling of d13C
Jade Star Lackey, Pomona College;
This is an Excel spreadsheet and graph that illustrates standard "batch" and Rayleigh decarbonation models and how they can be used to detect fluid infiltration during metamorphism of carbonates. It makes ...
Chemical Differentiation in the Palisades Sill
Matthew Gorring, Montclair State University
The purpose of this assignment is for students to synthesize field observations, petrography, and whole-rock chemical analyses in order to investigate chemical differentiation processes in a basaltic magma chamber. ...
Thermobarometry Problem Set
This homework assignment gives students first-hand experience with thermobarometric calculations. Because many of my students are math challenged, I give them a choice of solving the equations by hand or with ...
Application of Sr Isotopic Data to Tuolumne Intrusive Series, Sierra Nevada, CA
Jeff Tepper, University of Puget Sound
In this problem set students are given Rb/Sr and 87Sr/86Sr data for whole rock and mineral samples from three granitic intrusions in the Sierra Nevada. They use these data (in EXCEL) to calculate isochron ages and ...
Cameron Davidson, Carleton College
In this problem set the students use two different equations to calculate a conductive geothermal gradient using a spreadsheet program like Excel. Once they have the geothermal gradient plotted, they are asked to ...
Magma Modification in the central Sierra Nevada Batholith
Jennifer Wenner, University of Wisconsin-Oshkosh
This exercise is centered around a suite of rocks from the Sierra Nevada batholith. The activities are designed to give petrology students a capstone experience for the igneous portion of the upper-level Petrology ...
Karl Wirth, Macalester College Course: Dynamic Earth and Global Change 20 students This activity serves a number of functions, including an introduction to the course, a learning prompt that can be revisited ...