Open Textbooks

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Earth Science Texts from NAPEcosystems, Conservation, Ocean Studies, GIS, Hydrology - you can download free digital textbooks on all this and more from the Earth Science section of National Academies Press. Price listed is for delivery of paperback copies.
Virtual Course Materials
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MIT Open CoursewareMIT's Earth, Atmospheric, and Planetary Sciences department offers an extensive series of online courses. Courses generally include lecture videos, assignments, exams, and more.
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Virtual Geology LabsStudents can get certificates in virtual labs covering Earthquakes and Geological Dating.
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Animated Lessons on Plate TectonicsAn animated, video, html, lesson about plate tectonics that includes Wegner's hypothesis, the Theory, the driving forces, the three plate boundaries, convection curreents, hot spots, and plate tectonic reconstruction.
Local Geology
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KQED Geology ResourcesBlogs, images and videos highlighting local geological news, history and places of interest. Constantly updated.
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California Geology MagazineThe entire run of Calfornia Geology Magazine is available online from the California Department of Conservation. Great information for those teaching or studying local geology.
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California Geology Information WarehouseHosts over 3,100 maps, 1,400 reports and 600 Geographic Information System (GIS) datasets representing over 150+ years of history. Digital copies (in pdf format) are available for free download.