Barium in hybrid granitoid rocks of the southern Snake Range, Nevada
Donald E. Lee, Willis P. Doering
1974, Journal of Research of the U.S. Geological Survey (2) 671-675
In a magmatic environment, barium usually substitutes for potassium in the crystallizing silicates, and the two increase together in rocks late in the differentiation sequence. Results of this study show the opposite trend in an equivalent of a large part (63-76 percent SiO2) of the classic differentiation sequence that resulted...
Chemical weathering of serpentinite in the eastern Piedmont of Maryland
E.T. Cleaves, D. W. Fisher, O.P. Bricker
1974, Geological Society of America Bulletin (85) 437-444
Weathering processes in a small watershed (Soldiers Delight) underlain by Serpentinite in the Piedmont of Maryland were studied by means of a mass balance technique and were compared with the processes operative in a watershed uncertain by schist. The two terranes are downwasting at a rate of 2.4 m per...
Oxidation effect on the analysis of iron in the interstitial water of recent anoxic sediments
B.N. Troup, O.P. Bricker, J.T. Bray
1974, Nature (249) 237-239
Recent studies on the changes in composition of interstitial water during its separation from sediments1-3 prompted us to evaluate the effect of squeezing on the concentration of ferrous iron within the interstitial water. Sediment samples were taken in northern Chesapeake Bay (38°56′ N and 76°25′ W) with a Benthos gravity corer....
An experimental study of the partitioning of a rare earth element (Gd) in the system diopside—Aqueous vapour
Robert A. Zielinski, Frederick A. Frey
1974, Geochimica et Cosmochimica Acta (38) 545-565
The partitioning of Gd in the experimental system diopside-aqueous vapor as a function of temperature, pressure, composition of the phases, time, grain size, solid-liquid ratio and Gd concentration has been investigated. A radioactive tracer measurement was used to determine Gd concentration in the separated phases. Diposides were reacted with aqueous...
Geology and mineral resources of the Lehighton and Palmerton quadrangles, Carbon and Northampton Counties, Pennsylvania
Jack B. Epstein, W. D. Sevon, J. Douglas Glaeser
1974, Atlas 195cd
The Lehighton and Palmerton 73 1/2-minute quadrangles cover an area of about 112 square miles of diversified terrain in the folded Appalachian Mountain and Great Valley sections of the Valley and Ridge physiographic province in Carbon, Lehigh, and Northampton Counties, Pennsylvania. The Lehigh River and Blue Mountain are the prominent...
Contributions to the petrography and geochronology of volcanic rocks from the leeward Hawaiian Islands
G. B. Dalrymple, M. A. Lanphere, E. D. Jackson
1974, GSA Bulletin (85) 727-738
Petrographic and chemical analyses of basalt from Nihoa Island, Necker Island, French Frigate Shoals, and Midway Atoll, all in the leeward part of the Hawaiian chain, confirm that these islands are subaerial remnants of tholeiitic shield volcanoes similar to those that form the principal Hawaiian Islands. Chemistry suggests that Gardner...
Geologic framework of the Kuluncak-Sofular Area, East-Central Turkey, and K-Ar ages of igneous rocks
Gerhard W. Leo, Richard F. Marvin, Harald H. Mehnert
1974, Geological Society of America Bulletin (85) 1785-1788
The Kuluncak-Sofular area, located about midway between Sivas and Malatya in east-central Turkey is underlain by a variety of sedimentary, volcanic, and intrusive rocks. The sedimentary rocks have been deposited on a pre-Campanian serpentinite basement and include Cretaceous conglomerate, graywacke, tuff, and limestone; Eocene arkosic sandstone, conglomerate, and limestone; and...
Geologic sketch of the Klamath Mountains and Coast Ranges of northern California and southern Oregon
W. P. Irwin, E.W. Wolfe, M.C. Blake Jr., C.G. Cunningham
1974, Book chapter, Geologic guide to the southern Klamath Mountains: Geological Society of Sacramento, Annual Field Trip Guidebook
No abstract available....
Lunar basin formation and highland stratigraphy
Keith A. Howard, D.E. Wilhelms, D. H. Scott
1974, Reviews of Geophysics and Space Physics (12) 309-327
Multiring impact basins, formed after solidification of the lunar crust, account for most or all premare regional deposits and structures expressed in the lunar landscape and for major topographic and gravity variations. A fresh basin has two or more concentric mountain rings, a lineated ejecta blanket, and secondary impact craters....
Origin of Franciscan melanges in Northern California
M. Clark Blake Jr., D. L. Jones
1974, SEPM Special Publication 19
In northern California, chaotic Franciscan melange occurs beneath the overlying ophiolite and Great Valley Sequence. Identical melanges occur to the west, separating well-bedded, coherent Franciscan units that differ markedly in age. Detailed studies in several places indicate that these melanges mark the boundaries of imbricate thrust sheets, and they appear...
Earthquake mechanism and displacement fields close to fault zones: Report on the Sixth GEOP Research Conference
Craig R. Allen, Jon Berger, Ivan I. Mueller, James C. Savage, J. Weertman
1974, Eos, Transactions, American Geophysical Union (55) 836-840
The Sixth Geodesy/Solid Earth and Ocean Physics (GEOP) Research Conwas held on February 4–5, 1974, at the Institute of Geophysics and Planetary Physics, University of California, San Diego, in La Jolla, California. It was attended by about 100 persons.James N. Brune, program chairman, opened the conference and delivered the introductory...
Geodetic determination of strain at the Nevada Test Site following the Handley event
James C. Savage, W. T. Kinoshita, W.H. Prescott
1974, Bulletin of the Seismological Society of America (64) 115-129
Repeated surveys of a trilateration network (aperture greater than 20 km) centered on ground zero for the HANDLEY event, a nuclear explosion at the Nevada Test Site with yield in excess of 1 megaton, suggest that the explosion induced an east-west extension of the network by more than 50 mm....
Effects of the Bear Valley and San Juan Bautista earthquakes of 1972 on Geodimeter line lengths
W.H. Prescott, James C. Savage
1974, Bulletin of the Seismological Society of America (64) 65-72
Measurements of lines of the California Geodimeter network in the vicinity of the epicenters of four 1972 earthquakes (magnitudes 4.7, 4.7, 4.8, and 5.1) along the San Andreas fault system indicate that no significant anomalous changes in line length preceded or accompanied those earthquakes. Within the precision of measurement, the...
Tilt precursors before earthquakes on the San Andreas fault, California
M.J.S. Johnston, C.E. Mortensen
1974, Science (186) 1031-1034
An array of 14 biaxial shallow-borehole tiltmeters (at 10-7 radian sensitivity) has been installed along 85 kilometers of the San Andreas fault during the past year. Earthquake-related changes in tilt have been simultaneously observed on up to four independent instruments. At earthquake distances greater than 10 earthquake source dimensions, there...
Nature of the boulder batholith of Montana: Discussion
M. R. Klepper, G. D. Robinson, H.W. Smedes
1974, GSA Bulletin (85) 1953-1958
No abstract available. ...
Geophysical observations on northern part of Georges Bank and adjacent basins of Gulf of Maine
R. N. Oldale, J.C. Hathaway, William P. Dillon, J. D. Hendricks, James M. Robb
1974, AAPG Bulletin (58) 2411-2427
Continuous-seismic-reflection and magnetic-intensity profiles provide data for inferences about the geology of the northern part of Georges Bank and the basins of the Gulf of Maine adjacent to the bank.Basement is inferred to be mostly sedimentary and volcanic rocks of Paleozoic age that were metamorphosed and intruded locally by felsic...
Offset plutons and history of movement along the McKinley segment of the Denali Fault system, Alaska
Bruce L. Reed, Marvin A. Lanphere
1974, GSA Bulletin (85) 1883-1892
The Foraker and McGonagall plutons, bodies of granodiorite with nearly identical mineralogy and chemistry, are considered to be parts of a single igneous mass that has undergone right-lateral displacement of about 38 km along the McKinley segment of the Denali fault system since the igneous mass crystallized about 38 m.y....
Springs of Pennsylvania
Herbert N. Flippo Jr.
1974, Water Resources Bulletin 10
No abstract available....
An approximation of sediment yields from watersheds in Minnesota
C. R. Collier
1974, Conference Paper, Winter Meeting, Chicago, Illinois, December 10-13, 1974, Proceedings
No abstract available....
Leachate plumes in a highly permeable aquifer
Grant E. Kimmel, Olin C. Braids
1974, Groundwater (12) 388-392
Two landfills, 27 and 41 years old, were studied and found to have plumes of leachate-contaminated ground water extending 10,600 and 5,000 ft (3,200 and 1,500 m), respectively, from the site of deposition in the upper glacial aquifer on Long Island, New York. The plumes sink to the bottom of...
Spectrofluorimetric procedure using 2,3-napthalenediamine for determining selenium in rocks
Marian M. Schnepfe
1974, Journal of Research of the U.S. Geological Survey (2) 631-636
A spectrofluorimetric procedure using 2,3-naphthalenediamine is given for determining submicrogram and microgram quantities of selenium in mineralized rocks. Conditions for the satisfactory isolation and concentration of the selenium are investigated and tested on six USGS standard rocks of various types. Selenium contents of samples treated by an alkaline sinter and...
Molluscan phylogeny: The paleontological viewpoint
B. Runnegar, J. Pojeta Jr.
1974, Science (186) 311-317
Stasek theorized that the extant mollusks are the progeny of three separate lineages that separated before the phylum was well established. He wrote that no known intermediate forms, fossil or living, bridge the "enormous gaps between any two of the three lineages," and therefore treated each as a separate subphylum....
Improved nasal-saddle marker for mallards
Harold A. Doty, R. J. Greenwood
1974, Journal of Wildlife Management (38) 938-939
Abstract not available. ...
Radioactive waste storage in the arid zone
Isaac J. Winograd
1974, Eos Science News (55) 884-894
By the turn of the century, nuclear power may generate more than one-half of the electric energy, and about one-third of the total energy consumed in the United States [Thompson, 1971; Chapman et al., 1972]. By 2020, the total quantity of high-level radioactive wastes (HLW) generated as a byproduct of nuclear...
Trichomoniasis in the Hawaiian barred dove
R. M. Kocan, W. Banko
1974, Journal of Wildlife Diseases (10) 359-360
Two barred doves found in the south Kona district of the island of Hawaii were diagnosed as having trichomoniasis on the basis of gross and microscopic lesions. This brings the confirmed list of columbid species susceptible to natural trichomoniasis to four and is the first report of the disease...
