The Carboniferous formations and faunas of Colorado

In the following pages the geology and paleontology of the Carboniferous rocks of Colorado are discussed from the viewpoint of the stratigraphic paleontologist. This viewpoint is also that of one not personally acquainted with the field in question, except in very small measure. I made or assisted in making a few collections of fossils, and enjoyed the privilege of being connected for a month with a field party under the charge of Mr. Whitman Cross during the season of 1900. Most of the extensive collections which I have studied are the work of others, and the strata, in their characters and mutual attitudes, have been viewed only through the pages of geologic reports. The tendencies of my work are almost exclusively toward the historical geology, for from the nature of the case, even had I wished, it would have been difficult to dear with the structural or economic phases of the subject.