Stratigraphy and petrology of the Permian rocks of southwestern Montana / by Earle R. Cressman and Roger W. Swanson.
| Author/creator | Cressman, Earle Rupert, 1923- |
| Format | Book |
| Publication Info | Washington : U.S. Govt. Print. Off., 1964. |
| Description | vi, pages 275-569 : illustrations ; 29 cm. + 2 maps, 9 charts. |
| Subjects |
| Other author/creator | Swanson, Roger Warren, 1914- |
| Other author/creator | United States. Department of the Interior. |
| Other author/creator | Geological Survey (U.S.) |
| Other author/creator | U.S. Atomic Energy Commission. |
| Series | Geological Survey (U.S.). Professional paper, 313-C Geological Survey professional paper 313-C. ^A16492 Geology of Permian rocks in the Western phosphate field. UNAUTHORIZED |
| Contents | [v.1] Text -- [v.2] Plates. |
| Contents | Abstract -- Introduction -- Purpose of investigation -- Personnel and acknowledgments -- Geography -- Geologic setting -- Methods of study -- Field procedures -- Laboratory procedures -- Treatment of channel samples -- Chemical analyses -- P₂O₅ -- Acid insoluable -- Uranium -- Carbonaceous matter -- Spectrographic analyses -- Other analyses -- Petrographic methods -- Examination of hand specimens -- Thin sections -- Size analyses -- Heavy-mineral separation -- X-ray -- Terminology -- Explanation of illustrations -- Stratigraphy and petrography -- Stratigraphic nomenclature -- History of nomenclature -- Current nomenclature -- Park City Formation -- General character and distribution -- Lithology -- Carbonate rock -- Sandstone -- Mudstone -- Chert -- Stratigraphy -- Grandeur Member -- Franson Member -- Phosphoria Formation -- General character and distribution -- Lithology -- Frequency of rock types Occurrence of carbonaceous matter in the Retort Phosphatic Shale Member -- Phosphorite -- Mudstone -- Carbonate rock -- Chert -- Minor rock types -- Trace elements -- Contact metamorphism -- Stratigraphy -- Meade Park Phosphatic Shale Member -- Lower phosphorite -- Rex Chert Member -- Retort Phosphatic Shale Member -- Tosi Chert Member -- Cherty shale member -- Localization of exploitable phosphate deposits -- Shedhorn Sandstone -- General character and distribution -- Lithology -- Sandstone -- Chert -- Dolomite -- Stratigraphy -- Lower member -- Upper member -- Age of Permian rocks in southwestern Montana -- Relation of Permian strata to overlying beds -- Facies relations -- Genetic interpretations -- Origin of the rock types -- Well-sorted sandstone -- Lithologic character of source -- Location of source -- Environment of deposition -- Significance of glauconite -- Sily sandstone and tan and red mudstone -- Lithologic character of source -- Location of source -- Environment of deposition -- Chert -- Source of silica -- Environment of deposition -- Diagenesis -- Dark mudstone -- Source of detritus -- Source of carbonaceous matter -- Rate of production of carbonaceous matter -- Environment of deposition -- Phosphatic mudstone -- Solubility of apatite -- Source of phosphorus -- Manner of deposition -- Origin of pellets -- Bimodal frequency distribution of mudstone -- Summary -- Phosphorite -- Carbonate rock -- Park City Formation -- Phosphoria formation -- Paleogeography -- Tectonism -- Transgression and regression -- Summary of Permian events in southwestern Montana -- Stratigraphic sections -- Introduction -- References cited -- Index. |
| Local note | Joyner- FOR JOYNER LIBRARY HOLDINGS OF THE SERIES, GEOLOGICAL SURVEY PROFESSIONAL PAPER, SEARCH BY CALL NUMBER QE75 .P9. |
| General note | 2 maps, 9 charts in pocket. |
| General note | "Geology of Permian rocks in the western phosphate field."--T.p. |
| General note | "Prepared on behalf of the U.S. Atomic Energy Commission."--T.p. |
| Bibliography note | "References cited": pages 562-565. |
| Genre/form | Maps. |
| Genre/form | Maps. |
| GPO item number | 0624 |
| Govt. docs number | I 19.16:313-C |