Myxosoma cerebralis: Comparative sensitivity of spore detection methods
M.E. Markiw, K. Wolf
1974, Journal of the Fisheries Research Board of Canada (31) 1597-1600
Physical and biophysical methods of detecting spores of Myxosoma cerebralis were used in sequence on 87 individual fingerling rainbow trout (Salmo gairdneri) from two populations with a low incidence of infection. Physical methods of releasing spores from the organs of equilibrium, gill arches, or the axial skeleton gave an estimated rate of...
Hydrologic Data for Urban Studies in the Austin, Texas Metropolitan Area, 1972
E.E. Wehmeyer
1974, Report
The purpose of this report is to present rainfall and runoff data for the Waller Creek and Wilbarger Creek study areas for the 1972 water year (October 1, 1971 to September 30, 1972)....
Some helminth parasites of the American bald eagle
A.A. Kocan, L. N. Locke
1974, Journal of Wildlife Diseases (10) 8-10
Bald eagles (Haliaeetus leucocephalus) found dead or moribund in the United States and Canada and submitted to Patuxent Wildlife Research Center were examined for helminth parasites. Nine genera of helminths were reported which include new host records for Clinostomum complanatum, Neogogatea pandionis, Centrorhynchus sp., Serratospiculum amaculata, Capillaria contorta, and Habronema americanum....
The design earthquake and earthquake response spectra
W. W. Hays
1974, Earthquake Information Bulletin (USGS) (6) 18-22
Dieldrin and DDT: accumulation from water and food by lake trout (Salvelinus namaycush) in the laboratory
Robert E. Reinert, Linda J. Stone, Harold L. Bergman
1974, Proceedings of the Conference on Great Lakes Research (17) 52-58
In the laboratory we measured the amounts of dieldrin and p,p'DDT accumulated by fish from contaminated water and food to determine how fish from Lake Michigan accumulate high concentrations of these insecticides from an environment where the concentrations in water are generally less than 0.01 ppb. Eight groups of yearling...
Appraising volcanic hazards of the Cascade Range of the northwestern United States
D. R. Crandell, D. R. Mullineaux
1974, Earthquake Information Bulletin (USGS) (6) 3-10
The Mississippi Valley earthquakes of 1811 and 1812
O.W. Nuttli
1974, Earthquake Information Bulletin (USGS) (6) 8-13
Shortly after 2 o'clock on the morning of December 16, 1811, the Mississippi River valley was convulsed by an earthquake so severe that it awakened people in cities as distant as Pittsburgh, Pennsylvania, and Norfolk, Virginia. This shock inaugurated what must have been the most frightening sequence of earthquakes ever...
Residues of DDT in lake trout (Salvelinus namaycush) and coho salmon (Oncorhynchus kisutch) from the Great Lakes
Robert E. Reinert, Harold L. Bergman
1974, Journal of the Fisheries Research Board of Canada (31) 191-199
Concentrations of DDT residues were higher in lake trout (Salvelinus namaycush) from southern Lake Michigan in 1966–70 (average 18.1 ppm in fish 558–684 mm long) than in lake trout of the same size-class from Lake Superior in 1968–69 (4.4 ppm), and higher in adult coho salmon (Oncorhynchus kisutch) from Lake Michigan in 1968–71...
Earthquake history of Nebraska
C. A. von Hake
1974, Earthquake Information Bulletin (USGS) (6) 32-33
Nebraska is in a region of moderate seismicity occasionally punctuated by rather strong earthquakes. Most of the State is seismic risk zone 1, with a small part in the southeast corner in risk zone 2. the first significant earthquake felt in Nebraska occurred in 1867, the year that statehood was...
Earthquake history of Nevada
C. A. von Hake
1974, Earthquake Information Bulletin (USGS) (6) 26-29
Since 1852, more than 30 shocks of intensity VI or greater (Modified Mercalli scale) have occurred in western Nevada. At least three of these were classified as intensity X. In addition, seven earthquakes (intensity VI or greater) were centered in the eastern part of the State. Almost 2,000 other shocks...
New seismic study begins in Puerto Rico
Arthur C. Tarr
1974, Earthquake Information Bulletin (USGS) (6) 23-26
A new seismological project is now underway in Puerto Rico to provide information needed for accurate assessment of the island's seismic hazard. The project should also help to increase understanding of the tectonics and geologic evolution of the Caribbean region. The Puerto Rico Seismic Program is being conducted by the...
Teleseismic studies indicate existence of deep magma chamber below Yellowstone National Park
H. M. Iyer
1974, Earthquake Information Bulletin (USGS) (6) 3-7
The secrets of Yellowstone National Park's spectacular geysers and other hot water and steam phenomena are being explored by the U.S Geological Survey with the aid of distant earthquakes (teleseisms). For some time geologists have known that the remarkable array of steam and hot water displays, for which the park...
Geologic map of the United States (exclusive of Alaska and Hawaii)
Philip Burke King, Helen M. Beikman, Gertrude J. Edmonston
1974, Report
No abstract available....
An attempt to age mallards using eye lens proteins
Charles J. Henny, J. Larry Ludke
1974, Journal of Wildlife Management (38) 138-141
An analysis of insoluble protein content of eye lenses from 59 known-age mallards (Anas platyrhynchos) indicated a slight increase between 8-9 months and 7 years of age. Nearly a complete overlapping of the insoluble protein content of individuals of different ages was apparent showing that the technique cannot be used...
An improved chemical delivery apparatus for use in intermittent-flow bioassays
J. H. Chandler Jr., H.O. Sanders, D. F. Walsh
1974, Bulletin of Environmental Contamination and Toxicology (12) 123-128
No abstract available....
Gas-liquid chromatographic determination of 3-trifluoromethyl-4-nitrophenol residues in fish
J. L. Allen, J.B. Sills
1974, Journal of the Association of Official Analytical Chemists (57) 387-388
A procedure for the determination of 3-trifluormethyl-4-nitrophenol (TFM) in fish tissues is described. Homogenized tissues are extracted with hexane-ethyl ether; the extract is cleaned up by partitioning the TFM from the extracting solvent into 0.1N NaOH, acidifying the aqueous solution, and partitioning again with hexaneethyl ether. The TFM is methylated with...
Argillization by descending acid at Steamboat Springs, Nevada
Robert Schoen, Donald E. White, J.J. Hemley
1974, Clays and Clay Minerals (22) 1-22
Steamboat Springs, Nevada, an area of present-day hot springs, clearly illustrates the genetic dependence of some kaolin deposits on hot-spring activity. Andesite, granodiorite and arkosic sediments are locally altered at the land surface to siliceous residues consisting of primary quartz and anatase, plus opal from primary silicates. These siliceous residues...
Comparison of elemental accumulation rates between ferromanganese deposits and sediments in the South Pacific Ocean
T. Kraemer, J.C. Schornick
1974, Chemical Geology (13) 187-196
Rates of accumulation of Fe and Mn, as well as Cu, Ni, Co, Pb, Zn, Hg, U and Th have been determined for five ferromanganese deposits from four localities in the South Pacific Ocean.Manganese is accumulating in nodules and crusts at a rate roughly equivalent to that found...
Spectrophotometric determination of molybdenum in rocks with thiocyanate
E.G. Lillie, L. P. Greenland
1974, Analytica Chimica Acta (69) 313-320
A rapid procedure for the determination of microgram amounts of molybdenum in rocks is described. After acid decomposition, molybdenum is extracted from a hydrochloric acid solution into xylene with tributyl phosphate. After back-extraction with water, molybdenum is extracted as the α-benzoinoximate into chloroform, stripped into...
Earthquake history of Montana
C. A. von Hake
1974, Earthquake Information Bulletin (USGS) (6) 30-35
Montana is one of the most seismically active States in the Union. Since 1925, the State has experienced five shocks that reached intensity VIII or greater (Modified Mercalli Scale). During the same interval hundreds of less severe tremors were felt within the State. Montana's earthquake activity is concentrated mostly in...
The California geodimeter network; measuring movement along the San Andreas Fault
J.C. Savage
1974, Earthquake Information Bulletin (USGS) (6) 3-7
Following the great California earthquake of 1906 H. F. Reid, a contemporary seismologist, proposed the elastic rebound theory which in effect says that earthquake potential arises from the accumulation of elastic strain within the Earth's crust, just as the stretching of a rubberband creates the potential for violent rebound upon...
Seismicity and earthquake hazards of the Wasatch Front, Utah
H. Spall
1974, Earthquake Information Bulletin (USGS) (6) 12-17
The impressive topographic break at the base of the Wasatch Range immediately east of Salt Lake City, Utah, marks the location where Mormon colonizer Brigham Young said in 1847. "This is the place" Actually, "the place" is termed the Wasatch Front because the Wasatch Range to the east, which rises...
Earthquake history of Missouri
C. A. von Hake
1974, Earthquake Information Bulletin (USGS) (6) 24-26
Most of Missouri's earthquake activity has been concentrated in the southeast corner of the State, which lies within the New Madrid seismic zone. As recently as Merch 29, 1972, the region was jolted by a magnitude 3.7 shock that was felt over a 168,000 square kilometre area including parts of...
Earthquake history of Mississippi
C. A. von Hake
1974, Earthquake Information Bulletin (USGS) (6) 20-21
Since its admission into the Union in 1817, Mississippi has had only four earthquakes of intensity V or greater within its borders. Although the number of earthquakes known to have been centered within Mississippi's boundaries is small, the State has been affected by numerous shocks located in neighboring States. In...
Earthquake history of Minnesota
C. A. von Hake
1974, Earthquake Information Bulletin (USGS) (6) 28-29
French traders and missionaries were active in the region that is now Minnesota as early as the 1650's; however, settlement proceeded slowly and the area was not organized as a territory until 1849. Minnesota was admitted to the Union as the 32nd State on May 11, 1858. the earthquake history...
