Course Materials for GE129:

Numerous volcanic cones dot the surface of Bartolome Island in the Galapagos.
The background image is of a natural sea arch in the basalt (lava) flows on Santiago Island, also in the Galapagos.
Geology of Islands
Autumn, 2010

These presentations (in Microsoft PowerPoint) are made available solely for the use of students in GE129: Geology of Islands, at Colby College. These are the actual presentations made in class, sometimes augmented slightly to enhance the materials. However, nothing of substance will be added to materials once they have been presented in class without notifying the entire class that such a change has been made.
In order to view these, you will need to download them onto a computer capable of running Microsoft PowerPoint. Colby users not having this software may download it from the general server.

PLEASE NOTE that these materials will DOWNLOAD to your selected download folder. They will not automatically open in your browser or on the desk-top. These also cannot be downloaded on library computers or other college machines with restricted write access.
Course syllabus (as a pdf file)
Geography Homework Assignment (as a pdf file)
Island Project Handout (as a pdf file)
First day's lecture materials
Plate Tectonics I
Plate Tectonics II
Islands Produced by Tectonic Rifting
Islands Produced by Spreading Centers & Mantle Plumes
The Galapagos Islands, Part 1
The Galapagos Islands, Part 2
Volcanism in Island Arc Systems
Deltas, Mudlumps and Salt Domes: Sedimentary Islands I
Coastal Barrier Islands: Sedimentary Islands II
Tropical Carbonate Islands
Glacially Formed Islands


The Colby Geology web pages are maintained by R. E. Nelson. Please e-mail any questions, comments
or suggestions you may have, especially if you encounter difficulties.




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[ This page last modified on 23 November, 2010. ]