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...
Fresh lunar impact craters: Review of variations in size
Keith A. Howard
1974, Geochimica et Cosmochimica Acta (1) 61-69
Thirty-three morphologic characteristics are reviewed for fresh lunar impact craters wide than1 km. Bar graphs express the way each characteristic varies with crater size. The features are grouped as crater structure, ejecta, and downhill flow features. Major structural transition occur at diameters of about 15 and 200 km. Details of...
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....
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....
Report on Circum-Pacific Energy and Mineral Resources Conferences
M.T. Halbouty, J.F. Mason, E. E. Brabb
1974, Geotimes (19) 18-22
No abstract available....
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...
Eggshell thinning and residues in mallards one year after DDE exposure
M. A. Haegele, Rick H. Hudson
1974, Archives of Environmental Contamination and Toxicology (2) 356-363
A group of 16 mallard hens (Anas platyrhynchos), that had been given feed containing 40 ppm ofp,p'-DDE for 96 days, laid eggs with shells averaging about 15%–20% thinner than those of ten control birds during and up to 42 days after treatment. In eight of the treated birds killed at...
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....
Commentary: Geology, asbestos, and health
Malcolm Ross
1974, Environmental Health Perspectives (9) 123-124
A brief discussion of three types of geologic occurences of asbestos-like minerals is given. The problem of mining ore free of asbestos is considered....
Oil spills in the Arctic Ocean: Extent of spreading and possibility of large-scale thermal effects
R.C. Ayers Jr., H.O. Jahns, J.L. Glaeser
1974, Science (186) 843-846
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....
C. L. McGuinness — Hydrogeologist, writer, teacher
Gerald Meyer
1974, Groundwater (12) 332-334
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....
Development of the Circum-Antarctic Current
J.P. Kennett, R.E. Houtz, P.B. Andrews, A.R. Edwards, V.A. Gostin, M. Hajos, M. A. Hampton, D.G. Jenkins, S.V. Margolis, A.T. Ovenshine, K. Perch-Nielsen
1974, Science (186) 144-147
Deep-sea drilling in the Southern Ocean south of Australia and New Zealand shows that the Circum-Antarctic Current developed about 30 million years ago in the middle to late Oligocene when final separation occurred between Antarctica and the continental South Tasman Rise. Australia had commenced drifting northward from Antarctica 20 million...
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...
A respirometer with controllable oxygen levels
Dewey L. Tackett, J.J. Giudice, R.W. Raible
1974, Transactions of the American Fisheries Society (103) 825-828
Construction details and operation of a respirometer with capabilities for controlling the oxygen level at preselected levels is described. The interaction of an oxygen sensor and electronic switch energizes an electrolysis cell which replenishes oxygen used by a test organism. Respiration rate of any aquatic or semiaquatic organism may be...
