Field and Laboratory Project - Volcanology and Petrology of Interbedded Andesitic Lava Flows and Volcaniclastic Rocks from Washburn Volcano, Yellowstone National Park
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This page first made public: Jul 29, 2008
Skills and concepts that students must have mastered
How the activity is situated in the course
Content/concepts goals for this activity
- To study intraflow characteristics of andesite lava flows and flow breccias;
- to study sedimentological characteristics of volcanic debris flows and related sedimentary deposits;
- to distinguish lava flows from dikes and sills;
- to interpret the volcanic feature represented by Mount Washburn; and
- to interpret the petrology and geochemistry of calc-alkaline volcanic rocks in order to discover their origins.
Higher order thinking skills goals for this activity
Other skills goals for this activity
Description of the activity/assignment
Determining whether students have met the goals
- Sketches, descriptions, and interpretations (e.g., lava flow, dike, sill, debris flow, stream flow, flow breccia) of features of rock units at stations listed below and illustrated on the accompanying map (Fig. 1). The descriptions should include thickness of individual units. In addition, for dense, nonfragmental units (e.g., lava flows and tabular intrusions), include features such as chilled zones, distributions of vesicles, and a hand specimen petrographic description. For volcaniclastic units include clast sizes and composition, matrix texture, depositional structures. Answers to specific questions for stations.
- Petrographic descriptions of rock units (note: we will complete this back in laboratory on thin sections cut from previously collected Washburn samples).
- Interpretation of geochemical data for lava flows from Washburn volcano (note: we will complete this as a class project back at the university).
Download teaching materials and tips
- Activity Description/Assignment (Acrobat (PDF) 1.5MB Dec18 07)