Mercury in oil shale from the mahogany zone of the Green River formation, eastern Utah and western Colorado
John R. Donnell, Van E. Shaw
1977, Journal of Research of the U.S. Geological Survey (5) 221-226
Mercury has been reported in concentrations as high as 4 parts per million from oil shale in the Green River Formation near the Federal oil-shale prototype lease-tracts U-a and U-b in eastern Utah. This high concentration of mercury if present throughout a minable zone, would be of concern in commercial...
Land use and land cover changes: A framework for monitoring
James R. Anderson
1977, Journal of Research of the U.S. Geological Survey (5) 143-153
Information on the rate and kind of change in the use of land resources is essential to-the proper planning, management, and regulation of the use of such resources. Starting in 1975, the U.S. Geological Survey has been engaged in mapping and inventory of land use and land cover at a...
Blades of olivine in ultramafic rock from northern Sierra Nevada, California
Anna Hietanen
1977, Journal of Research of the U.S. Geological Survey (5) 217-219
Blades of olivine in random arrangement crystallized in a small body of serpentine just north of the Grizzly pluton as a result of contact metamorphism. Interstitial minerals are talc, chlorite, and minor amount of cummingtonite....
Pleistocene fishes from Alameda County, California
Richard W. Casteel, David P. Adam
1977, Journal of Research of the U.S. Geological Survey (5) 209-215
Six types of freshwater fishes were recovered from an early Pleistocene (Irvingtonian) locality on the east side of San Francisco Bay, Alameda County, Calif. The fauna includes one centrarchid, one salmonid, three cyprinids, and one catostomid. The fauna indicates fluvial and slow-moving or lacustrine aquatic environments. One of the...
Electrical soundings near Yellow Creek, Rio Blanco County, Colorado
David L. Campbell
1977, Journal of Research of the U.S. Geological Survey (5) 193-205
Ten vertical electrical soundings were made in the Piceance Creek Basin in October 1974-5 along Yellow Creek, 2 in Big Duck Creek, and 1 each along Corral Gulch, on the hill in sec. 20, 1 kilometre northwest of 84 Ranch, and along the White River between the mouths of Yellow...
Geology and Rb-Sr age of Precambrian W Puritan Quartz Monzonite, northern Michigan
P.K. Sims, Zell E. Peterman, W. C. Prinz
1977, Journal of Research of the U.S. Geological Survey (5) 185-192
The Puritan Quartz Monzonite, in the western part of the Upper Peninsula of Michigan, composes a batholith at least 50 kilometres long and as much as 20 km wide on the south side of the Gogebic iron range. It is associated with subaqueous metavolcanic rocks assigned to the Precambrian W...
Metamorphic rocks of the Yakutat-St. Elias area, south-central Alaska
Travis Hudson, George Plafker, Donald L. Turner
1977, Journal of Research of the U.S. Geological Survey (5) 173-184
Metamorphic rocks in the Yakutat-St. Elias area range in grade from zeolite to amphibolite facies. Radiometric age determinations on selected metamorphic rocks have helped to identify two major metamorphic events, one in Late Cretaceous time that was characterized by penetrative deformation, and one in the Miocene Epoch that resulted in...
Intrusive rocks of the Yakutat-St. Elias area, south-central Alaska
Travis Hudson, George Plafker, Marvin A. Lanphere
1977, Journal of Research of the U.S. Geological Survey (5) 155-172
Twenty-three plutons, exposed over a total area of nearly 1200 km2, have been studied in the Alaska part of the St. Elias Mountains between long 138° and 141°W. Results of potassium-argon age determinations combined with field relations, petrography, and major- and trace-element chemistry suggest six major intrusive events: (1) late...
Delaware River: Evidence for its former extension to Wilmington Submarine Canyon
D.C. Twichell, H.J. Knebel, D. W. Folger
1977, Science (195) 483-485
Seismic-reflection profiles indicate that during the Pleistocene the Delaware River flowed across the continental shelf east of Delaware Bay and emptied into Wilmington Submarine Canyon. The ancestral valley (width, 3 to 8 kilometers; relief, 10 to 30 meters) is buried, is not reflected in the surface topography,...
High temperature heat content and heat capacity of silicate glasses: experimental determination and a model for calculation
Charles R. Bacon
1977, American Journal of Science (277) 109-135
Knowledge of the thermodynamic properties of silicate melts is fundamental to quantitative characterization of igneous systems. This paper presents new data on one of these properties, heat content, for silicate glasses and supercooled silicate liquids and derives partial molar heat contents for the glasses. The high temperature heat contents of...
Reflection and refraction of type-II S waves in elastic and anelastic media
Roger D. Borcherdt
1977, Bulletin of Seismological Society of America (67) 43-67
The general theory of viscoelasticity, which accounts for elastic as well as anelastic linear behavior of materials, predicts that two types of S waves propagate in anelastic earth materials. The particle motion for an inhomogeneous plane S wave of type I is elliptical in the plane defined by the directions of propagation and attenuation,...
A new host for Pleistophora ovariae (Microsporida)
M.L. Nagel, G. L. Hoffman
1977, Journal of Parasitology (63) 160-162
No abstract available. ...
Composition of Pacific Ocean ferromanganese nodules
David Z. Piper, M.E. Williamson
1977, Marine Geology (23) 285-303
Bulk composition of ferromanganese nodules from the pelagic environment of the Pacific Ocean is apparently related to nodule-growth rate, sediment-accumulation rate, and biologic productivity in the overlying seawater. Nodules with a high MnFe">MnFe ratio and high Ni and Cu concentrations tend to occur in areas where...
Composition and phase chemistry of sulfide globules in basalt from the Mid-Atlantic Ridge rift valley near 37°N lat
G. Czamanske, James G. Moore
1977, GSA Bulletin (88) 587-599
The electron microprobe was used to determine the bulk composition of immiscible sulfide globules trapped in the glass phase of 25 fresh submarine basalt samples from the Mid-Atlantic Ridge. Twenty-three samples represent a spectrum of primitive through differentiated tholeiites from the FAMOUS dive area; two are differentiated basalts from the...
Compositional variations of young basalts in the Mid-Atlantic Ridge rift valley near lat 36°49′N
W.B. Bryan, James G. Moore
1977, GSA Bulletin (88) 556-570
Fifty acoustically positioned samples of fresh basalt were collected by the submersible Alvin from the median valley of the Mid-Atlantic Ridge during the French American Mid-Ocean Undersea Study (FAMOUS) in the summer of 1974. The samples show regular compositional variations from the center of the rift valley (central lava flows) out to...
Sheeted dikes, gabbro, and pillow basalt in flysch of coastal southern Alaska
Russell G. Tysdal, J. E. Case, G. R. Winkler, S. H. B. Clark
1977, Geology (5) 377-383
A Paleocene to Eocene(?) mafic sequence of igneous rocks on Knight Island and a Cretaceous mafic and ultramafic sequence of the Resurrection Peninsula in coastal southern Alaska are characterized by pillow basalts, sheeted dikes, and gabbro intrusions. At both localities, pillow basalts are interbedded with flysch, and the gabbros intrude...
The effects of the α‐β phase transformation on the creep properties of hydrolytically‐weakened synthetic quartz
Stephen H. Kirby
1977, Geophysical Research Letters (4) 97-100
Nine rectangular prisms of hydro‐thermally‐grown synthetic quartz crystals with 900 atomic ppm H+ were loaded in compression at 1400 bars stress and temperatures between 403 and 764°C. The a and c directions were at 45° to the compression direction, and the slip system appears to operate over the entire range of temperatures....
Mechanical twinning in diopside Ca(Mg,Fe)Si2O6: Structural mechanism and associated crystal defects
Stephen H. Kirby, J.M. Christie
1977, Physics and Chemistry of Minerals (1) 137-163
iopside twins mechanically on two planes, (100) and (001), and the associated macroscopic twinning strains are identical (Raleigh and Talbot, 1967). An analysis based on crystal structural arguments predicts that both twin mechanisms involve shearing of the (100) octahedral layers (containing Ca2+, Mg2+ and Fe2+ ions) by a magnitude of c/2. Small adjustments...
Geology of the Waynesboro East and Waynesboro West Quadrangles, Virginia
Thomas M. Gathright II, William S. Henika, John L. Sullivan
1977, Book, Virginia Division of Mineral Resources Publication
The Waynesboro East and Waynesboro West Quadrangles comprise an area of approximately 117 square miles (304 sq km) in portions of Albemarle, Augusta, and Nelson counties in north-central Virginia. Included in the quadrangles are portions of the Piedmont, Blue Ridge, and Valley and Ridge physiographic provinces and two major regional...
The effect of the Faka Union Canal system on water levels in the Fakahatchee Strand, Collier County, Florida
Leo J. Swayze, Benjamin F. McPherson
1977, Water-Resources Investigations Report 77-61
The Faka Union Canal system, constructed in the western Big Cypress Swamp, Fla., in the early 1970's, lies about 3.5 miles west of the centerline of the Fakahatchee Strand, a forested water course which the State of Florida has designated as an Area of Critical State Concern in order to...
Saline-water intrusion related to well construction in Lee County, Florida
Durward Hoye Boggess, T.M. Missimer, T.H. O’Donnell
1977, Water-Resources Investigations Report 77-33
Ground water is the principle source of water supply in Lee County, Florida where an estimated 30,000 wells have been drilled since 1990. These wells ranges in depth from about 10 to 1,240 feet and tap the water table aquifer or one or more of the artesian water-bearing units or...
The U.S. Geological Survey's Central Region headquarters, Denver, Colorado
1977, Report
Geohydrology of Muscatine Island, Muscatine County, Iowa
R.E. Hansen, W. L. Steinhilber
1977, Water Supply Bulletin 11
Muscatine Island is a wide segment of the west bank of the Mississippi River flood plain that covers about 50 square miles in Muscatine and Louisa Counties; the project area encompasses the 30 square miles in Muscatine County. The flood plain is underlain by thick, permeable alluvial deposits that comprise...
Impact of strip-mine reclamation practices: a simulation study
James E. Ellis, William J. Parton
1977, Report
No abstract available....
Final report on a wildlife impact information system (WIIS)
1977, Report
No abstract available....
