Abstract
IN NATURE for December 27, 1900, we noticed the first and sixth parts of the Twentieth Annual Report of the United States Geological Survey. We have now received the remaining volumes. Part ii., comprising “General Geology and Palaeontology,” consists of 953 pages with 193 plates. It includes a brief article on the geology of the Philippine Islands, by Mr. G. F. Becker; but as we have since received the full report (noticed further on), we may pass on to the next paper by Mr. J. Nelson Dale, a study of Bird Mountain, Vermont. This mountain, the summit of which is 2200 feet high, lies in the Taconic Range, and consists of about 500 feet of Ordovician grit and conglomerate interbedded with muscoviteschist, and underlain by similar schist with beds of quartzite. The author discusses the origin of the mountain, the features of which have been largely sculptured by glacial action. The Devonian fossils from south-western Colorado, constituting the fauna of the Ouray Limestone, are described by Mr. George H. Girty. Although by some authorities regarded as Carboniferous, Mr. Girty con siders that the fauna indicates late Middle or early Upper Devonian. Varieties of Spirifer disjunclus occur, together with numerous other fossils.
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The Geological Survey of the United States . Nature 65, 176–178 (1901). https://doi.org/10.1038/065176a0
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DOI: https://doi.org/10.1038/065176a0