Figure 5. Same image of K-spar overgrowth as in Figure 5. Clicking on the center of the image has brought up a text box explaining that secondary porosity was developed by the dissolution of detrital plagioclase, which is stained pink. Notice that the term “secondary porosity” is colored and underlined, indicating the presence of a hyperlink. (In the tutorial, clicking on “secondary porosity” accesses the glossary entry for secondary porosity).