. Carnegie Institution of Washington publication. NORTH AMERICA AND THEIR VERTEBRATE FAUNA. 59 probably not far from its correct faimal correlation as well. The paleontological comiDarisons are yet to be worked out. The unconformity above the Capitan lime- stone, and locally even in the Delaware VIountain formation, the Capitan having been carried away, is not taken into account in making these ; It is probable that it diminishes rapidly to the northward, where it is of less consequence. "One of the most interesting features of the Guadalupian fauna is its isolation. As h
. Carnegie Institution of Washington publication. NORTH AMERICA AND THEIR VERTEBRATE FAUNA. 59 probably not far from its correct faimal correlation as well. The paleontological comiDarisons are yet to be worked out. The unconformity above the Capitan lime- stone, and locally even in the Delaware VIountain formation, the Capitan having been carried away, is not taken into account in making these ; It is probable that it diminishes rapidly to the northward, where it is of less consequence. "One of the most interesting features of the Guadalupian fauna is its isolation. As has been stated by Girty, the fauna is a unique one, and, as a unit, is now known from no other part of the western hemisphere. At first thought it seems peculiar. Fig. II.—Map showing Beedc's idea of the Palcogcography of the Red Beds in the southern part of the Plain Province. (After Beede.) that more of its members were not distributed over the adjacent regions where con- temporaneous strata occur. Their absence in such rocks has been a serious difficulty in any attempt to correlate them with other American faunas. "In the first place, the lower Red Beds lying to the eastward, with which the Guadalupian limestones are probably contemporaneous, are believed by some to be to a considerable extent of subaerial origin, while the temporary seas that occupied portions of it from time to time were too concentrated in salt content for normal " Richardson, University Mineral Survey Texas, Bull. 9, pp. 43, 44, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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