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,...
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 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...
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...
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 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...
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...
Natural gas movement by pipelines, 1974
Water Resources Division, U.S. Geological Survey
1977, Report, National atlas of the United States
No abstract available....
Winter bird populations in pine and pine-hardwood forest stands in East Texas
J.G. Dickson, C.A. Segelquist
1977, Report, Proceedings of the Annual Conference, Southeast Association of Fish and Wildlife Agencies
No abstract available....
Effects of coal strip mining on habitat use, activities, and movements of pronghorn antelope (Antilocapra americana)
1977, Report, 1976 Annual Progress Report
No abstract available....
Nuclear fuel materials movement by highways (BTU): 1975
Water Resources Division, U.S. Geological Survey
1977, Report, National energy transportation systems
No abstract available....
Lakes of Oregon, Volume 5: Marion County
Joseph F. Rinella
1977, Report
An inventory of lakes and reservoirs of Oregon is essential for a complete evaluation of the total surface-water supply of the State and to provide a basis for answering questions about Oregon's lakes. Much of the information on lakes and reservoirs previously collected by Federal and State agencies has never...
Table describing metalliferous mineral deposits in the western part of southern Alaska
Edward M. MacKevett
1977, Open-File Report 77-169-F
No abstract available....
Nuclear fuel materials movement by highways (truckloads), 1975
Water Resources Division, U.S. Geological Survey
1977, Report, National atlas of the United States
No abstract available....
Topographic mapping status and progress of operations: (7 1/2- and 15-minute series)
U.S. Geological Survey
1977, Report
Petroleum products movement by pipelines, 1974
Water Resources Division, U.S. Geological Survey
1977, Report, National atlas of the United States
No abstract available....
Petroleum products movement by water, 1974
Water Resources Division, U.S. Geological Survey
1977, Report, National atlas of the United States
No abstract available....
Tactical approach for determining impact of energy development on wildlife in Wyoming: special report number 1
Kent D. Keenlyne
1977, FWS/OBS 77/42
The U.S. Fish and Wildlife Service, within the Department of Interior, is responsible for providing national leadership in the management and protection of the nation's fish and wildlife resources, their habitat, and environment. Specifically, the Office of Biological Services obtains and assimilates biological and environmental data and identifies additional informational...
