The Pioneers of Appalachian Geology are back! With much help from the IAT/SIA geology committee, the new and improved pioneers page now honors over 30 geologists who have made key contributions to the understanding of Appalachian/Caledonian terranes and to geologic principals in general. Particular thanks to Walter Anderson who spearheaded the latest round of geologist biographies and contributed many himself, and to Jim Hibbard, who, in addition to writing several new biographies, helped with editing and organization. Thanks also to Bob Marvinney and others for research and tracking down pioneer photos.