. Geology and water resources of the Gila and San Carlos valleys in the San Carlos Indian reservation, . WASHINGTON GOVERNMENT PRINTING OFFICE1919 CXDNTENTS. Page. Introduction 1 Physiography and drainage 4 General features 4 Gila Basin 5 San Carlos Basin 5 Geology 6 Igneous rocks 6 Sedimentary rocks 6 . Pre-Quaternary rocks 6 Quaternary deposits 7 General character 7 Gila conglomerate 7 Lake beds 8 ,., 10 Quaternary history . 10 Classification of lands 10 Surface water supply 11 Present irrigation 16 Shallow ground water 18 Occurrence and quantity 18 Quality 19 Use for ir
. Geology and water resources of the Gila and San Carlos valleys in the San Carlos Indian reservation, . WASHINGTON GOVERNMENT PRINTING OFFICE1919 CXDNTENTS. Page. Introduction 1 Physiography and drainage 4 General features 4 Gila Basin 5 San Carlos Basin 5 Geology 6 Igneous rocks 6 Sedimentary rocks 6 . Pre-Quaternary rocks 6 Quaternary deposits 7 General character 7 Gila conglomerate 7 Lake beds 8 ,., 10 Quaternary history . 10 Classification of lands 10 Surface water supply 11 Present irrigation 16 Shallow ground water 18 Occurrence and quantity 18 Quality 19 Use for irrigation. 23 Artesian water 23 Summary and conclusions 26 ILLUSTRATIONS. Plate I. Map of Arizona showing areas covered by reports of the United States Geological Survey relating to ground water 2 II. Geologic map of Gila Basin and parts of San Carlos Basin, San Carlos Indian Reservation, Ariz 8 III. Map of a part of Gila Valley in San Carlos Indian Reservation, Ariz., above San Carlos reservoir site, showing classification of lands andlocation of wells and springs, with notes on topography and nativevegetatiogeologywaterreso00schw
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