Igneous Rock Compositions and Plate Tectonics part of Integrating Research and Education:EarthChem:Igneous Rocks and Tectonics
Allen Glazner and Kent Ratajeski Published July 28, 2005. Description In this exercise, students use whole-rock major- and trace-element compositions of igneous rocks from a variety of tectonic settings and ...

Compositional Diversity in Volcanic Suites part of Integrating Research and Education:EarthChem:Compositional Diversity in Volcanic Suites
Kent Ratajeski Published Oct. 26, 2004. Description In this exercise, students use whole-rock major- and trace-element compositions of volcanic rocks to explore the origins of compositional variation in igneous ...

Physical and Chemical Variations Along the Central American Volcanic Arc part of Integrating Research and Education:EarthChem:Central America Volcanoes
Kent Ratajeski Published June 13, 2007. Description The Central American volcanic arc displays large arc-parallel variations in chemical composition that yield important clues concerning the complex origin of ...

Global Geochemistry of Mid-Ocean Ridge Basalts part of Integrating Research and Education:EarthChem:Mid-Ocean Ridge Basalts
Kent Ratajeski Published Oct. 15, 2006. Description Geological processes at the mid-ocean ridges are responsible for the bulk of the Earth's heat loss and volcanic activity. The compositions of materials ...

Crystallization-Differentiation of the Kilauea Iki Lava Lake part of Integrating Research and Education:EarthChem:Kilauea Iki Lava Lake
Kent Ratajeski Published Oct. 26, 2004. Description In this exercise, students use major-element compositions of whole-rocks, volcanic glasses, and minerals in lavas and drill cores from the solidified Kilauea Iki ...

Part 2 - Volcano morphologies part of Integrating Research and Education:EarthChem:Central America Volcanoes
Now you'll make a series of plots using the data from the downloaded Excel file which focus on the heights and volumes of the volcanoes along the Central American arc, and their relation to variations in ...

Part 4 - Prepare the Data for Graphing part of Integrating Research and Education:EarthChem:Compositional Diversity in Volcanic Suites
Check for rows of anomalous data At this point, it is a good idea to check the data for rows that you do not want to include. Remember that GEOROC datasets include all data published, including partial analyses, ...

Part 7 - Analyze and Interpret Your Results part of Integrating Research and Education:EarthChem:Compositional Diversity in Volcanic Suites
Questions to answer You should now have a number of variation diagrams plotted. Its time to try to make some sense out of all of this! The following are just a few question to get you thinking about what these ...

Create a Variation Diagram part of Integrating Research and Education:EarthChem:Compositional Diversity in Volcanic Suites
In any step, click the 'Show me' link to reveal extra information. A sequence of 'Show me's indicates a series of steps. If you prefer a printout of the full set of instructions for this part, ...

Part 5 - Decide Which Variation Diagrams to Plot part of Integrating Research and Education:EarthChem:Compositional Diversity in Volcanic Suites
Background Obviously, variation diagrams are alot more useful than looking at tables of whole-rock data from a suite of samples. At the same time, the proper use of variation diagrams is definitely an acquired ...