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Paleocene deposits of the San Juan Basin, New Mexico. Bulletin of the AMNH ; v. 33, article 22.

Show simple item record Sinclair, William John, 1877-1935. en_US Granger, Walter, 1872-1941. en_US 2005-10-06T14:29:26Z 2005-10-06T14:29:26Z 1914 en_US
dc.description p. 297-316, [10] leaves of plates (2 folded) : ill, map ; 24 cm. en_US
dc.description Includes bibliographical references. en_US
dc.description Itinerary -- Structural relationships; location of exposures -- Pre-Puerco formations. Conglomeratic sandstone with fossil logs. Shales with dinosaurs, upper horizon. Lower conglomerate. Shales with dinosaurs, lower horizon. Age of the Ojo Alamo beds -- The Puerco Formation. Basal uncomformity. The Puerco sediments. 1. Ojo Alamo section. 2. Kimbetoh Arroyo section. Thickness of the Puerco. Fossil levels; origin of the Puerco sediments -- The Torrjon Formation. The Torrjon sediments. Torrejon fossil levels. Thickness of the Torrejon. Torrejon-Wasatch relationships. Origin of the Torrejon sediments -- Age of the Puerco and Torrejon -- "Nacimiento" as a group name -- Summary -- Collecting localities. en_US
dc.description.abstract "The more important stratigraphic results may be summarized as follows: 1. Separation of the pre-Puerco beds into several members which are, in descending order, a heavy conglomeratic sandstone with much fossil wood, a series of clays with channel sandstones, a conglomerate and a series of dove-colored clays, red-banded near the top. The two conglomeratic members have disconformities at their bases. Dinosaurs occur, especially at two levels separated by the lower conglomerate. More or less of this series of beds may be correlateable with the Animas formation. 2. Complete confirmation of Barnum Brown's observation regarding the unconformable relationship of the Puerco with respect to the conglomeratic sandstone with fossil logs on which it rests. A topography in low relief was developed on the surface of this sandstone previous to the deposition of the Puerco clays, which cover up these hills and valleys. 3. Accurate location of the two Puerco fossil levels and demonstration of the fact that Polymastodon is confined to the uppermost of the two levels. For their position see sections A and B, Fig. 2. 4. Measurement of the thickness of the Puerco on continuous exposures from the unconformity at its base to the level of the first occurrence of Torrejon fossils. 5. Discovery of fossil plants in the Puerco. 6. Accumulation of data which seem to prove the fluviatile origin of the Puerco sediments. 7. Discovery of a new fossil horizon in the Torrejon, 100 feet below the horizon from which fossils had hitherto been obtained. 8. Finding of Torrejon fossils at still lower levels (see sections). 9. Location of the Torrejon levels with reference to those of the Puerco (see actions A and B, Fig. 2). 10. Correlation of the Rio Puerco and Arroyo Torrejon sections published by Dr. Gardner of the U.S. Geological Survey with the sections measured by the American Museum party. 11. Accumulation of data which seem to prove the fluviatile origin of the Torrejon sediments"--P. 314-315. en_US
dc.format.extent 13180708 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York : Published by order of the Trustees, American Museum of Natural History en_US
dc.relation.ispartofseries Bulletin of the American Museum of Natural History ; v. 33, article 22. en_US
dc.subject.lcc QH1 .A4 vol.33, art.22, 1914 en_US
dc.subject.lcsh Geology, Stratigraphic -- Paleocene -- San Juan Basin (N.M. and Colo.) en_US
dc.subject.lcsh Geology, Stratigraphic -- Paleocene -- New Mexico. en_US
dc.subject.lcsh Geology -- San Juan Basin (N.M. and Colo.) en_US
dc.subject.lcsh Geology -- New Mexico. en_US
dc.title Paleocene deposits of the San Juan Basin, New Mexico. Bulletin of the AMNH ; v. 33, article 22. en_US
dc.title.alternative Paleocene deposits, San Juan Basin, N. Mex. en_US
dc.type text en_US

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  • Bulletin of the American Museum of Natural History
    The Bulletin, published continuously since 1881, consists of longer monographic volumes in the field of natural sciences relating to zoology, paleontology, and geology. Current numbers are published at irregular intervals. The Bulletin was originally a place to publish short papers, while longer works appeared in the Memoirs. However, in the 1920s, the Memoirs ceased and the Bulletin series began publishing longer papers. A new series, the Novitates , published short papers describing new forms.

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