This guide provides illustrated descriptions of 46 common and important varieties of igneous, sedimentary, and metamorphic rock found in the San Francisco Bay region. Rock types are described in context of their...

This unit provides younger students with an introduction to rocks and minerals. Topics include the definition of a mineral, the physical properties of minerals and how they are measured, and a discussion of quartz, the...

This is a general structural geology page where some pictures and definitions of fault blocks can be found.