This website is the product of a lifetime of studying and teaching about igneous and metamorphic rocks. There are many people who helped along the way and others who contributed directly to the creation of the book itself.

Clémentine Hamelin has been an invaluable partner in the development of the Rock Library, designing and executing procedures to map and present thin section data. Clémentine also helped with the preparation of several phase diagrams. Liza Mulder provided important page design and programming assistance in the initial stages of development. Olivia Leadbetter, Clara Brill-Carlat, Ann Pufall, Anne Lepow, Jordan Straub, and Isabel Ahlstrom helped assemble lots of geological information and data, compiled web links, took many photographs, and drafted many diagrams. Josephine Gollin collected data for several Rock Library compositional maps. Jiamin Li helped conquer the subtlties of d3.js and with many other programming details. Joan Kahini worked on server programming with PHP and SQL. Tianyun Xu and Mingxuan Chia helped with programming and editing tasks.

Frank Spear created the svg files for the AFM diagrams that are used to animate the Spear and Cheney (1997) petrogenetic grid. His Gibbs software was used to calculate the mineral assemblage diagrams and modal mineral proportions for the same petrogenetic grid. Frank helped in countless other ways, including calculating data when needed for diagrams and providing important feedback on drafts of diagrams and text.

Smith College has generously supported this project through Committee on Faculty Compensation and Development Grants, Committee on Educational Technology Grants, and by providing server space. Colleagues at Smith have provided important advice and helped facilitate this work in many ways. Especially notable in their aid are Tony Caldanaro, Jordan Crouser, Tom Laughner, Bill Peterson, Suzanne Palmer, and Keith Streeter.

Chemical maps were created with EDAX TEAM software using an Apollo XP detector on an FEI Quanta 450 scanning electron microscope. Thin section images were captured with an Olympus DP70 camera on Olympus BH and BX microscopes, or with a Nikon Eclipse Ti-S Light Microscope with an automated stage and software.