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Page 2678, results 66926 - 66950

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Geochemical prospecting for ores; a progress report
Herbert Edwin Hawkes
1949, Economic Geology (44) 706-712
Methods of prospecting for mineral deposits by means of chemical studies of residual soil, alluvium, glacial moraine, vegetation, and natural water were first applied on a systematic scale in Scandinavia and Russia about 15 years ago. Since the war, work in this field has been undertaken by several independent groups...
Buried preglacial ground water channels in the Albany-Schenectady area in New York
Eugene S. Simpson
1949, Economic Geology (44) 713-720
A map is presented showing contours of the buried preglacial channel of the Mohawk River from Schenectady, New York, to its confluence with the Hudson River about 12 miles south of Albany and of associated buried preglacial channels. The Pleistocene history of a portion of the Mohawk and Hudson Rivers...
Geology and ground water of the Azapa valley, province of tarapaca, Chile
George C. Taylor
1949, Economic Geology (44) 40-62
In the Azapa valley, Chile, Pleistocene and Recent alluvial fill, composed of intercalated lenses of clay, silt, sand, and gravel, contains a zone of saturation that is sustained by infiltration from floods of the San Jose river, from December through March....
Artificial recharge of ground water by the city of Bountiful, Utah
1949, Eos, Transactions, American Geophysical Union (30) 539-542
The City of Bountiful, Utah, is situated just beyond the eastern edge of an area where alluvial gravel and sand of Pleistocene and probably Tertiary age yield water by artesian flow. Attempts to recharge these aquifers by diversion of surplus stream water into a spreading canal east of the city...
Discussion of “Runoff from rain and snow” by Arthur M. Piper
H.W. Sexton, Arthur M. Piper
1949, Eos, Transactions, American Geophysical Union (30) 606-607
As a basis to study the discharge characteristics of the Metolius River the John Day River was used. The Deschutes Basin of which the Metolius drainage area is a part was compared to the John Day Basin. There are several factors which must be considered when comparing the two basins....
Volcanic activity on Umnak and Great Sitkin Islands, 1946–1948
F.M. Byers Jr., W. W. Brannock
1949, Eos, Transactions, American Geophysical Union (30) 719-734
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...
Recovery of ground‐water supplies by pumping from watertable ponds
Henry N. Halberg, Claude M. Roberts
1949, Eos, Transactions, American Geophysical Union (30) 283-292
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...
Reservoir systems in Maine
Miner R. Stackpole
1949, Eos, Transactions, American Geophysical Union (30) 437-438
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...
The relation of geology to dry‐weather stream flow in Ohio
William Perry Cross
1949, Eos, Transactions, American Geophysical Union (30) 563-566
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...
Report of the Committee on Groundwater, 1946–1948
S. W. Lohman
1949, Eos, Transactions, American Geophysical Union (30) 598-600
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...
Sheet structure, a major factor in the occurrence of ground water in the granites of Georgia
Harry E. LeGrand
1949, Economic Geology (44) 110-118
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...
Field method for the determination of zinc in soils
Rollin Elbert Stevens, Hy Almond
1949, Economic Geology (44) 296-306
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...
Distribution of uranium in the Florida phosphate field
James B. Cathcart
1949, Trace Elements Investigations 85
Land-pebble phosphate, hard-rock phosphate, and river-pebble phosphate are the three types of phosphatic rock found in Florida. This report is concerned primarily with the land-pebble deposits, the only type which contains a significant amount of uranium. The most productive part of the land-pebble district is in Polk and Hillsborough Counties, in...
Fourth special report of the Hawaiian Volcano Observatory of the U.S. Geological Survey and the Hawaiian Volcano Research Association: Steam blast volcanic eruptions: A study of Mount Pelée in Martinique as type volcano
T. A. Jaggar
1949, Report
The investigation is concerned with the author's expedition to Martinique and St. Vincent in 1902 and comparison of the experience of investigators and sufferers with that of others in so-called "explosive" eruptions. The Hawaiian mechanism is reviewed with special reference to rifts, underground water, intrusion furnace, wedge rupture, and lowering...
Determination of color of turbid waters
W.L. Lamar
1949, Analytical Chemistry (21) 726-727
A convenient procedure for determining the color of turbid waters, using the principle of precipitation of turbidity by the electrolyte calcium chloride, is described. Because the stable turbidity of many surface waters cannot be completely precipitated by conventional centrifuging alone, this procedure presents a means of flocculating the turbidity without...
Age and growth of the lake whitefish, Coregonus clupeaformis (Mitchill), in Lake Erie
John Van Oosten, Ralph Hile
1949, Transactions of the American Fisheries Society (77) 178-249
Although the whitefish has by no means ranked first from the standpoint of production, it has always been an important commercial species in Lake Erie. Trends in the output of whitefish have differed in the United States and Canadian waters of the lake. The 1893–1946 average annual yield of 1,201,000...