Probability of moraine survival in a succession of glacial advances
A. B. Gibbons, J.D. Megeath, K. L. Pierce
1984, Geology (12) 327-330
Emplacement of glacial moraines normally results in obliteration of any older moraines deposited by less extensive glacial advances, a process we call “obliterative overlap.” A probability analysis of the likely impact of obliterative overlap on the completeness of the glacial record assumes that...
Crassulacean acid metabolism in submerged aquatic plants
Jon E. Keeley
C. Sybesme, editor(s)
1984, Book chapter, Advances in Photosynthesis Research: Proceedings of the VIth International Congress on Photosynthesis (Volume IV)
CO2-fixation in the dark is known to occur in various organs of many plants. However, only in species possessing crassulacean acid metabolism (CAM) does dark CO2-fixation contribute substantially to the carbon economy of the plant. Until very recently CAM was known only from terrestrial...
NONFUEL MINERAL RESOURCES OF THE PACIFIC EXCLUSIVE ECONOMIC ZONE.
David Clague, James Bischoff, David Howell
1984, Conference Paper, Oceans Conference Record (IEEE)
The Pacific Exclusive Economic Zone contains a variety of hard mineral resources. Sand and gravel and their associated placer deposits of heavy minerals are the most likely to be developed in the near future, but offshore and deep water deposits of phosphorite, abyssal manganese nodules, ferromanganese crusts enriched in cobalt,...
The “anomalous cedar trees” of Lake Ashi, Hakone Volcano, Japan
Y. Oki
1984, Earthquake Information Bulletin (USGS) (16) 24-27
On the bottom of Lake Ashi at Hakone, Japan, there stand great trees that, since ancient times, have been widely known as the "Anomalous Cedar Trees" of Ashi. It is not known why these trees grow on the bottom of the lake, and it remains one of the mysteries of...
Ground-water-quality data from the Powder River structural basin and adjacent areas, northeastern Wyoming
L. R. Larson, R. L. Daddow
1984, Open-File Report 83-939
Water-quality data for wells and springs in the Powder River basin in northeastern Wyoming are presented in three tables. The first table lists results of analyses of common constituents for 748 ground-water sites. The second table presents dissolved-trace-metal data for 220 ground-water sites. Radiochemical data are listed in the third...
First record of marsupials (Metatheria: Polyprotodonta) from the Oligocene in Africa
T. M. Bown, E.L. Simons
1984, Nature (308) 447-449
Metatherian (marsupial) and eutherian (placental) mammals are end members of a complex, possibly common North American1-4 or, less likely, a South American5 stock that diverged before the early late Cretaceous and underwent separate adaptive radiations establishing them as the two dominant mammalian groups (subclass Theria). By the later Cretaceous, marsupials...
Biochemical indicators of stress in fishes: An overview
Dora R. M. Passino
V. W. Cairns, P. V. Hodson, J. O. Nriagu, editor(s)
1984, Book chapter, Contaminant effects on fisheries
No abstract available....
Lithostratigraphy of Upper Ordovician strata exposed in Kentucky, with a section on biostratigraphy
Gordon Whitney Weir, Warren Lee Peterson, W. C. Swadley, John Pojeta Jr.
1984, Professional Paper 1151-E
Ordovician formations above the Lexington Limestone crop out in the Blue Grass region of Kentucky and along the Cumberland River and its tributaries. The formations are all conformable and in places intertongue and intergrade. The major Ordovician units above the Lexington Limestone in the Blue Grass region are: The Clays...
Applicability of La-Ce systematics to planetary samples
Noboru Nakamura, Mitsunobu Tatsumoto, Kenneth R. Ludwig
1984, Journal of Geophysical Research Solid Earth (89) B438-B444
Ce isotopic compositions in several terrestrial and extraterrestrial materials were determined in order to investigate the applicability of using Ce as an isotopic tracer to geological processes. Owing to the low abundances of 138La and 138Ce in nature, our measurements of 138Ce/ 140Ce ratios of natural samples have relatively large (>0.02%) errors, and the...
Magnetic properties of the Bay of Islands ophiolite suite and implications for the magnetization of oceanic crust
B. Ann Swift, H. Paul Johnson
1984, Journal of Geophysical Research B: Solid Earth (89) 3291-3308
Rock magnetic properties, opaque mineralogy, and degree of metamorphism were determined for 101 unoriented samples from the North Arm and Blow-Me-Down massifs of the Bay of Islands ophiolite complex, Newfoundland. The weathered and metamorphosed extrusive basalt samples have a weak, secondary magnetization arising from oxidation and exsolution of ilmenite of...
Slope-stability analysis and creep susceptibility of Quaternary sediments on the northeastern United States continental slope
James S. Booth, Armand J. Silva, Stephen A. Jordan
1984, Conference Paper, Seabed mechanics: IUTAM symposium
The continental slope off the northeastern United States is a relatively steep, morphologically complex surface which shows abundant evidence of submarine slides and related processes. Because this area may be developed by the petroleum industry, questions arise concerning the potential for further slope failures or unacceptable deformations and the conditions...
Insects may develop immunity to pesticides--not to being eaten
E.O. Garton, L.A. Langelier, John Y. Takekawa
1984, Focus on Renewable Resources (9) 7
No abstract available at this time...
Meeting migratory bird management needs by integrated disease control
M. Friend
1984, Transactions of the North American Wildlife and Natural Resources Conference (49) 480-488
No abstract available....
The frogs of Tulare
M.R. Jennings, M.P. Hayes
1984, Outdoor California (45) 17-19
No abstract available at this time...
Origin and distribution of carbon dioxide in the unsaturated zone of the southern High Plains of Texas
Warren W. Wood, Michael J. Petraitis
1984, Water Resources Research (20) 1193-1208
Partial pressures of CO2, O2, N2, and Ar were monitored at two locations in the Ogallala aquifer system on the Southern High Plains of Texas. Samples were collected monthly during parts of 1980–1981 from nine depths ranging from 0.6 to 36 meters below land surface. PCO2 was observed to be greater at...
RECOMMENDATIONS FROM THE DEPARTMENT OF THE INTERIOR - EEZ SYMPOSIUM.
Robert W. Rowland, Bonnie A. McGregor
1984, Conference Paper, Oceans Conference Record (IEEE)
The Presidential proclamation on March 10, 1983, of a 200-nautical-mile-wide Exclusive Economic Zone (EEZ) focuses attention on the mineral resources of a vast submarine area. The hard-mineral resources in the EEZ include shallow-water placer deposits, polymetallic sulfide deposits, and cobalt-enriched manganese crusts in deeper water. The petroleum resource potential of...
HOT WATER DRILL FOR TEMPERATE ICE.
Philip L. Taylor
1984, Conference Paper, CRREL Special Report (US Army Cold Regions Research and Engineering Laboratory)
The development of a high-pressure hot-water drill is described, which has been used reliably in temperate ice to depths of 400 meters with an average drill rate of about 1. 5 meters per minute. One arrangement of the equipment weighs about 500 kilograms, and can be contained on two sleds,...
Composition and energy contents of mature inshore spawning capelin (Mallotus villosus): Implications for seabird predators
W.A. Montevecchi, John F. Piatt
1984, Comparative Biochemistry and Physiology, Part A: Molecular & Integrative Physiology (78) 15-20
1. Lipid levels of capelin are highest in late fall and lowest during the summer spawning season; protein levels are constant at 13–14% body wt throughout the year.2. Ovid females contained significantly more lipid and protein and less water and had higher energy densities than males and spent...
Life cycle of a mayfly Hexagenia limbata in the St. Marys River between Lakes Superior and Huron
Donald W. Schloesser, Jarl K. Hiltunen
1984, Journal of Great Lakes Research (10) 435-439
Length-frequency distribution curves of Hexagenia limbata nymphs collected in May, August, and October 1974 and May 1975 in the St. Marys River between Lakes Superior and Huron were bimodal for each sampling period. These curves, combined with interpretation of nymphal emergence period and mean surface water temperatures, indicate that the population of Hexagenia nymphs...
Applied cartographic communication: map symbolization for atlases.
J. L. Morrison
1984, Cartographica: The International Journal for Geographic Information and Geovisualization (21) 44-84
A detailed investigation of the symbolization used on general-purpose atlas reference maps. It indicates how theories of cartographic communication can be put into practice. Two major points emerge. First, that a logical scheme can be constructed from existing cartographic research and applied to an analysis of the choice of symbolization...
Accelerator radiocarbon dating of evidence for prehistoric horticulture in Illinois
N. Conard, D.L. Asch, N.B. Asch, D. Elmore, H. Gove, M. Rubin, J.A. Brown, M.D. Wiant, K.B. Farnsworth, T.G. Cook
1984, Nature (308) 443-446
With the development of direct detection radiocarbon dating, which uses an accelerator as part of a highly selective mass spectrometer, it is now possible to determine the age of milligram samples of organic materials1-5. One application of accelerator dating is in evaluating scanty, sometimes controversial evidence for early horticulture throughout...
A Model of Regional Ground-Water Flow in Secondary-Permeability Terrane
J. M. Gerhart
1984, Groundwater (22) 168-175
The ground-water flow system in the Lower Susquehanna River Basin in Pennsylvania and Maryland can be considered as one complex unconfined aquifer in which secondary porosity and permeability are the dominant influences on the occurrence and flow of ground water. The degree of development of...
U. S. GEOLOGICAL SURVEY ALASKAN GOLD PROJECT.
John C. Antweiler, John Cathrall, Richard Tripp
1984, Conference Paper, University of Alaska, Mineral Industry Research Laboratory, MIRL Report
The United States Geological Survey has begun a state-wide study of Alaskan gold deposits. The immediate goals are to determine the relationship of gold in placer deposits to possible primary sources, to determine how nuggets form, to contribute to existing knowledge of principles for prospecting for placer deposits, and determine...
Spilled oil and infaunal activity - Modification of burrowing behavior and redistribution of oil
H.E. Clifton, K.A. Kvenvolden, J. B. Rapp
1984, Marine Environmental Research (11) 111-136
A series of experiments in Willapa Bay, Washington, indicates the degree to which the presence of spilled oil modifies the burrowing behavior of infauna and the extent to which the animals redistribute oil into intertidal sediment. Small amounts of North Slope crude oil introduced at low tide directly into burrow...
Determination of carrier yields for neutron activation analysis using energy dispersive X-ray spectrometry
R. G. Johnson, G.A. Wandless
1984, Journal of Radioanalytical and Nuclear Chemistry Articles (81) 21-28
A new method is described for determining carrier yield in the radiochemical neutron activation analysis of rare-earth elements in silicate rocks by group separation. The method involves the determination of the rare-earth elements present in the carrier by means of energy-dispersive X-ray fluorescence analysis, eliminating the need to re-irradiate samples...
