With a Geological Twist Volcanic Petrology
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Current SelectionTeaching Volcanic Petrology

Mount Shasta, California

The Danube River and Castle, Budapest

Budapest, Hungary

The Power Point presentation was delivered at an International Mineralogical Association meeting in August, 2010, in Budapest Hungary. The photograph shows the Royal Castle, also called Buda Castle, from the Pest side (north side) of the Danube River.

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Mount Shasta, California

Mount Shasta, California is the largest of the volcanoes in the Cascade Range. Over 4000 m high, it has the shape of the classic volcano. The rocks making the mountain are felsic and intermediate fragmental falls, fragmental flows, and lava flows. Activity began some 590,000 years ago and has erupted intermittently ever since. An account by an early European explorer and sailor suggests the last eruption was in 1786. See Christiansen, R.L (1990) Shasta. In Wood, C.A. and Kienle, J. Volcanoes of North America, p. 214-216, for more details.

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 Teaching Volcanic Petrology

This page provides access to a document that characterizes volcanic rocks in terms of their geologic context, texture, and mineralogy. The document is almost free of rock names and names for rock textures. Rather, rocks labeled by the mineral assemblages they contain and by descriptions of rock textures written in ordinary English.

Many geoscientists graduate from university without the systematic petrology that was part of the background of geologists educated in the last century. The tract tries to furnish the information needed to answer the question, "What is the stuff that came from the volcano that just erupted?" If the person being interrogated doesn't know the answer, they at least know what they have to learn.

The Portable Document Format (*.pdf) files can be read on the screen or printed. To read and print the documents, your computer will have to have Adobe's Acrobat Reader. Adobe Acrobat Reader is furnished free of charge and you can obtain it by clicking on the following button:
Adobe Reader Link

The electronic documents can be downloaded to your computer by clicking the links:
Apologia.pdf
NatureVocanicRocks.pdf
The first file explains why I wrote the second one.

A Power Point presentation that summarizes the important points of the program described in the *.pdf files that can be downloaded by clicking on one of the following links:
Budapest.pptx, Budapest.ppt
If you view the pptx or ppt file using 'Presenters Tools' you can read the notes and view the slides. It's the 2nd item under the'Slide Show' menu.