W. D. Matthew, Fossil Vertebrates and Geological Time
William Diller Matthew (1871-1930) was one of the leading vertebrate paleontologists of the early twentieth century. His taxonomic and phylogenetic researches significantly changed the understanding of evolution of many families and orders of mammals. In addition, Matthew was much concerned with geological questions. His biostratigraphic studies considerably refined understanding of the localities and ranges of Tertiary vertebrate fauna in the western United States, and he extended those interpretations to define correlations between American stratigraphic units and those in other areas of the world. On the basis of that work, Matthew made notable contributions to the understanding and improvement of the geological time scale.