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The Livingston Formation is a series of pyroclastic rocks several thousand feet thick cropping out on the north side of the Beartooth Mountains. These pyroclastic rocks grade laterally into the Claggett, Judith River, Bearpaw, and Lennep formations of the Montana Group, according to Stone and Calvert [see 1 of references...

In addition to projects such as those reported in parts I and II above, the Section of Geophysics of the Federal Government has undertaken a considerable amount of fundamental research.Two such field‐projects may be mentioned, one a magnetometric study in the Comstock District of Nevada, and the other a resistivity‐study...

Those of you who attended the annual meeting of this Section on April 27, 1938, heard a paper entitled “A method for introducing a new standard of length” that was presented by Professor Philip Klssara, calling attention to the Bill then in Congress proposing to redefine the length of the...

The hydrologists who are concerned with the study of the water that occurs below the land‐surface feel strongly the need of better agreement among the different countries as to the fundamental concepts of this branch of hydrology and as to technical terms to designate these concepts. For this reason, the...

Early application of electricity to the ground was of interest particularly to telegraphy especially when it was first commercially applied. There was available at that time the Newtonian analysis of sources and sinks in a semi‐infinite medium which could be applied directly to ground‐contacts. Experiments conducted at that time showed...

As a consequence of the detailed investigation of the alunite and other mineral deposits of the Marysvale Region in southwest‐central Utah, opportunity was afforded to map and study the succession of volcanic rocks that underlie most of this area. The Marysvale Region is part of a large area of volcanic...

From the beginning of time, all ingenuity of mankind has been concentrated upon the methods of finding gold and unusual deposits in the earth. An illustration (Fig. 1) from the old treatise by Agricola, “De Re Metallica,” published in 1580, will serve to show the implicit faith of that generation...

In preparing the report of the Committee on Underground Waters of the Section of Hydrology for the final year of the triennium, it becomes evident that the collection of fundamental data relating to the hydrology of underground waters continues at a rate comparable to that maintained in the past few...

In the prediction of spring runoff from precipitation‐records or snow‐surveys, one of the factors which seems to require consideration is the amount of water held in ground‐storage. The determination of the quantity of water in ground‐storage is a difficult problem involving soil‐sampling, measurements of ground‐water wells, and measurements of the...

The membership of this Committee is as follows:C. S. Howard (Chairman), United States Geological Survey, Washington, D.C.I. A. Denison, National Bureau of Standards, Washington, D.C.W. P. Kelley, 119 Hilgard Hall, University of California, Berkeley, CaliforniaA. C. Lane, 22 Arlington Street, Cambridge, MassachusettsC. S. Scofield, Bureau of Plant Industry, United States...

The High Plains region has been passing through a prolonged low in the precipitation‐cycle during a large part of the last decade. The drought has continued longer and has been more severe than any that has been experienced since the region began to be farmed. It has caused untold distress....

The magnitude of flood‐runoff and the degree to which it concentrates in river‐channels with respect to time is known to vary within wide limits. To a considerable extent these variations relate to the physiographic and edaphlc features of the drainage‐basins as they have been developed by the geologic and climatic...

During 1938 and 1939, an extensive series of geophysical surveys, employing both resistivity and magnetic methods, have been carried on in the Hawaiian Islands by the Section of Geophysics of the United States Geological Survey in cooperation with the Division of Ground‐Water of the Survey and the Division of Hydrography...

The Committee on Glaciers at present is constituted as follows:Harry Fielding Reid—Professor‐Emeritus of Geology, Johns Hopkins University (former member of the International Glacier Commission), 608 Cathedral Street, Baltimore, MarylandWilliam H. Hobbs—Professor‐Emeritus of Geology, University of Michigan (until recently Vice‐ President of the International Glacier Commission, at present associate member), Ann...

The Geological Survey has been engaged for more than 50 years in measuring and publishing the discharge of streams of the United States. Measured discharges have ranged in quantity from a small fraction of a second‐foot measured volumetrically to more than 2,000,000 second‐feet measured by use of the current‐meter equipment...

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Sienna ("ocher") deposits in the Cartersville district, Georgia, occur in the contact zone between dolomitic limestone and underlying quartzite of Lower Cambrian age. These rocks, together with interbedded schists, were folded and recrystallized probably near the close of Paleozoic time. Simple fissures and transverse and oblique faults, formed during the...

The hot spring north of Delta, Utah, is of particular interest because it has yielded commercial manganese ore; 715 tons of manganese oxide ore that averaged 20% manganese and 0.26% sulphur is recorded. The deposits occur as a thin bed and as lenses and nodules in a dome about 1,600...

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