GeoWikiThe Geosciences Library is a principal hub of the LibreTexts project covering all areas of geoscience. There are three principle collections in each subject area, Bookshelves, Campus Bookstore, and Learning Objects. The Bookshelves area holds texts two classes of texts: "Textbooks" and "Textmaps". Textbooks are the essentially online textbooks whereas “Textmaps” are specialized remixes that are constructed to follow the organization of existing commercial textbooks. The Campus Bookshelves area holds campus-specific and faculty-specific course shells. Each shell is customized to address the needs of faculty and their students and typically contains text remixes. Learning objects are content items, practice items, and assessment items. These resources are self-contained, digital or non-digital resources that can be used for learning, education or training. Learning objects can be organized to easily form collections of themed content, including traditionally designed courses.