Abstract
During 1964 and 1965, while I was doing work in the Department of Geochronology at the University of Arizona (with special application to paleobotany and palynology), we did a research project in the Petrified Forest of Arizona. We had especially good results with fine microphotographs of many species of Chinle formation conifers. Thus encouraged, Dr. Kremp next initiated some research in the Grand Canyon in palynology.