Lecture 7 3/2/15 Chemeketa Community College GEO 142 Lecture 7 Web Site Lecture Here is the powerpoint in pptx format. 450 MB Here is the powerpoint in pdf format. 30 MB Lab Here is lab 4 in pdf format. Here are the maps for lab 4 in pdf format. Videos Volcanoes Around the World Columbia River Basalts Mt. St. Helens Extra Credit Video 285 MB mp4 file