Publications

As part of the United States Geological Survey's volcano program in the Aleutian volcanic arc during 1946–1948, the volcanoes and thermal areas on Umnak and Great Sitkin Islands were studied. In addition to observation of the volcanoes, temperatures of fumaroles were measured and some products of the volcanic activity were collected and analyzed.After an eruption in 1945, Cone A in Okmok Caldera o

This paper summarizes a study made to determine whether ground‐water storage in the glacial deposits in the vicinity of Fresh Pond, a water‐table pond used as part of the public supply of the City of Cambridge, Massachusetts, is available to augment the supply from surface‐water reservoirs.Test wells were drilled; water level, well and test boring, and quality of water data, and data on Inflow and

The numerous lakes and ponds that are found in almost every portion of the State of Maine are important resources of the state. There are 2222 bodies of fresh water that are classed as great ponds, that is, ponds whose areas are ten acres or more, and the total area of these lakes aid ponds is about 1500 sq mi. These are a result of glaciation of the region. Some of these ponds are very deep; dept

Because of the widely scattered locations of the membership, no assembled meeting of the Committee was held during the year, all discussions being held by correspondence. Consideration was given to three subjects during the year: (1) standardization of terminology as related to runoff (continued from previous year), (2) deficiencies in hydrologic research, and (3) current programs of hydrologic re

An attempt is made to outline the principal features which are to be considered in infiltration problems. The need for consideration of genetic and morphological relations is emphasized, especially the view that the latter is a boundary condition for the quantitative procedures usually derived from the former. Detailed development of infiltration relations are given for the more usual genetic prof

The regime of dry‐weather flow of several streams in Ohio is presented by flow‐duration curves. For comparison, the index of ground‐water flow for each basin is the discharge in cubic feet per second per square mile which is exceeded 90 per cent of the time. These indices are shown on a map of Ohio, and are discussed with respect to known geological conditions. It is concluded that stream‐flow rec

No report of the Committee was prepared for the fiscal year 1946–1947, so the present report covers the two‐year period July 1, 1946 through June 30, 1948. Because of space limitations, fits report covers only items of research that have come to the attention of the Chairman. Reports m Hydrology and physiography of limestone terranes, by A. C. Swinnerton, and on The relation between comsumptive us

Increasing demand for supplies of ground water in the Piedmont of Georgia has necessarily focused attention on granitic rocks, which have a considerable areal extent in this part of the state. These rocks have the property generally known as sheet structure. Major parting planes resulting from sheeting are usually sub-parallel to the rock surface on hills and in valleys and consequently control th

A series of samples of residual clay at the Friends Station zinc deposit, Tenn., was collected and analyzed for zinc. Results indicate that residuum containing 0.05 percent Zn and more is the product of weathering of limestone and dolomite containing zinc mineralization. Chemical analysis of residual clays for zinc shows promise as a method of prospecting for zinc in the limestone valleys of the s

A method is described for the field estimation of total zinc in soils. A small sample of soil is fused with potassium bisulfate, the fused mass dissolved in water, buffered at pH 4 to 5.5 with acetate buffer, and sodium thiosulfate added to form complex ions with metals that might cause interference. Measured increments of the sample solution are added to a carbon-tetrachloride-dithizone solution,

The varied applications of paleobotany to coal resource studies, coal technology, and to fundamental physical and chemical research on coal are briefly indicated. The usual conception of paleobotany is not as broad as this, and many of the studies of fossil plants have been conducted without reference to the part the plant materials assume in composing coal. The interrelationship of paleobotany wi

No abstract available.