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The index lists the steam-flow and reservoir stations in the Lower Mississippi River Basin for which records have been or are to be published for periods prior to September 30, 1950. The stations are listed in downstream order. Tributary streams are indicated by indention. Station names are given in their...

The ground-water conditions of the area covered by the Paintrock irrigation project, in north-central Wyoming, were investigated during the summer of 1947. The purpose of the study was to obtain a general evaluation of ground-water recharge, discharge, and storage in the area now irrigated and in the adjacent areas where...

The observation well network in Alabama was started in 1940. Unpublished water-level data collected periodically at 254 observation wells are listed in this report with the location, description, and general information on construction of the observation wells. Publications containing water-level data from selected observation wells are also listed. (USGS)...

This is the fourth of a series of interpretive reports on the water resources of the major valleys of Santa Barbara County, Calif., prepared by the Geological Survey, United States Department of the Interior, in cooperation with Santa Barbara County. The first three reports described the other major valleys in...

A large volume of pumice is widely distributed over the Klamath Indian Reservation in 'flow' and 'fall' deposits. The flow material on the Reservation is restricted to the area west of Klamath Marsh, and the fall material is thickest immediately southeast of the Marsh. Tests of the chemical and physical...

This report summarizes the research work of the Trace Elements Section, Geochemistry and Petrology Branch, from the organization of the Section in April 1948 to December 31, 1950. The research undertaken thus far consists of laboratory and related field studies in the following fields: 1. Mineralogic and petrologic investigations of radioactive...

The use of electrical networks to describe heat‐ and mass‐transfer problems is an interesting concept and undoubtedly will be of considerable value in future water‐loss investigations, provided the processes involved can be represented, electrically, with sufficient accuracy.Although it is true that errors in measurement of water‐surface temperature may arise when...

This summary lists the Geological Survey's current and future investigations of uranium and other elements of related interest. The titles of the investigations are grouped under the headings listed in the table of contents. Entries in each category are listed alphabetically, according to author or project leader, and numbered consecutively....

The Cedar Hills, an area of about 320 square miles in central Utah between the northern end of the Wasatch Plateau and the southern end of the Wasatch Mountains, form the boundary zone between the Colorado plateaus and the Great Basin. The oldest exposed rocks are Carboniferous, but most of...

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During the 1951 field season, U. S. Geological Survey Navy Oil Unit party 1 conducted stratigraphic and structural studies of the rocks in the area between the westernmost fork of the Shaviovik River and the East Kuparuk River. This area is drained by the Sagavanirktok River and its major tributaries;...

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This report describes the geologic features that can be used to appraise the favorability of ground in guiding diamond-drill exploration for carnotite deposits in the Upper Jurassic Morrison formation on the Colorado Plateau. It is based on a statistical study of the geologic logs of about 2,500 holes drilled...

The older Precambrian rocks of Arizona include the Vishnu, Yavapai, and Pinal schists, all overlain unconformably by nonmetamorphosed younger Precambrian rocks. The older Precambrian schists, unnamed gneisses, and associated granitic masses crop out in many of the mountain ranges southwest of the Colorado plateau. The stratigraphy and structure of the schists can be unraveled to some extent by detailed mapping, and work now in progress by...

Paleontology and biochemistry together may yield fairly definite information, eventually, about the paleochemistry of sea water and atmosphere. Several less conclusive lines of evidence now available suggest that the composition of both sea water and atmosphere may have varied somewhat during the past; but the geologic record indicates that these...

The present report concludes the duties of the above Committee, and the Chairman takes this opportunity to thank the members and others for their splendid cooperation during the triennium ended June 30, 1950. Another in the series of reports on hydrology and physiography of limestone terranes, by A. C. Swinnerton, is given as...