Intrusive rocks and plutonic belts of southeastern Alaska, U.S.A
David A. Brew, Robert P. Morrell
1983, GSA Memoirs (159) 171-194
About 30 percent of the 175,000-km2 area of southeastern Alaska is underlain by intrusive igneous rocks. Compilation of available information on the distribution, composition, and ages of these rocks indicates the presence of six major and six minor plutonic belts.From west to east, the major belts are: the Fairweather-Baranof belt of...
Crassulacean acid metabolism in Isoetes bolanderi in high elevation oligotrophic lakes
Jon E. Keeley, C.M. Walker, R.P. Mathews
1983, Oecologia (58) 63-69
Isoetes bolanderi dominates the littoral flora of Siesta (elevation 2,440 m) and Ellery (2,905 m) lakes in the Sierra Nevada Range of California, USA. Both lakes are sparsely vegetated and I. bolanderi maintained aboveground oven dry weight of 30–50 m−22 through most of the 1981 summer growing season. Plants at the higher elevation Ellery...
Body shot in Atlantic brant
Ronald E. Kirby, Holliday H. Obrecht III, Matthew C. Perry
1983, Journal of Wildlife Management (47) 527-530
No abstract available. ...
The relationship between harvest and survival rates of mallards: A straightforward approach with partitioned data sets
James D. Nichols, James E. Hines
1983, Journal of Wildlife Management (47) 334-348
We randomly partitioned mallard (Anas platyrhynchos) bandings and recoveries from each of a number of selected reference areas into 2 groups and estimated survival and harvest rates for each area and group. This procedure produced independent vectors of survival- and harvest-rate estimates, which were used to test the general hypothesis...
Crassulacean acid metabolism in the seasonally submerged aquatic Isoetes howellii
Jon E. Keeley
1983, Oecologia (58) 57-62
Evidence to date is consistent with the hypothesis that the submerged aquatic Isoetes howellii Engelmann possesses crassulacean acid metabolism. Quantitative 14C uptake studies indicate that CO2 assimilation in both the light and dark are functions of pH and total inorganic carbon level. In both the light and dark, maximum uptake rates in 0.6 mM...
Latest Oligocene through early middle Miocene diatom biostratigraphy of the eastern tropical Pacific
John A. Barron
1983, Marine Micropaleontology (7) 487-515
Study of DSDP Sites 71, 77, and 495 has allowed the development of a refined diatom biostratigraphy for the latest Oligocene through early middle Miocene of the eastern tropical Pacific which is well correlated to the low-latitude zonations for planktonic foraminifers, coccoliths, and radiolarians. Six zones and 7 subzones are...
Comparison of stable isotope reference samples
Tyler B. Coplen, Carol Kendall, Jessica A. Hopple
1983, Nature (302) 236-238
Use of light stable isotope ratio measurements has proliferated in the past decade. The need for procuring additional stable isotope reference materials was recognized at an International Atomic Energy Agency (IAEA) consultants' meeting convened in 19761. This group recommended acquisition of two carbonates, two carbon dioxide samples, a biotite, a...
Correlation of changes in gravity, elevation, and strain in southern California
R.C. Jachens, W. Thatcher, C. W. Roberts, R.S. Stein
1983, Science (219) 1215-1217
Measurements made once or twice a year from 1977 through 1982 show large correlated changes in gravity, elevation, and strain in several southern California networks. Precise gravity surveys indicate changes of as much as 25 microgals between surveys 6 months apart. Repeated surveys show that annual elevation...
Comment and Reply on ‘Mid-Paleozoic age of the Roberts thrust unsettled by new data from northern Nevada’: REPLY
Keith B. Ketner
1983, Geology (11) 618-618
No abstract available....
Comment and Reply on ‘Mid-Paleozoic age of the Roberts thrust unsettled by new data from northern Nevada’: REPLY
Keith B. Ketner
1983, Geology (11) 61-62
No abstract available....
The Giles County, Virginia, seismic zone
G. A. Bollinger, R. L. Wheeler
1983, Science (219) 1063-1065
A well-defined seismic zone recently detected in Virginia has an orientation that is not related to the surrounding geologic structures. The orientation of the zone appears to be related to features below the Appalachian overthrust belt. A damaging earthquake that is important in evaluating seismic hazard in the southeastern United...
Temporal accumulation of organochlorine pesticides in shorebirds wintering on the south Texas coast, 1979-80
Donald H. White, Christine A. Mitchell, T. Earl Kaiser
1983, Archives of Environmental Contamination and Toxicology (12) 241-245
Organochlorine pesticide residues were determined in 168 shorebirds of three species collected at approximate bimonthly intervals during the fall and winter months of 1979–80 near Port Mansfield on the south Texas coast. The study was conducted to determine if shorebirds wintering on mudflats at the outlets of agricultural drains in...
Platte River Forum for the Future: workshop model documentation
1983, Report
The Platte River Forum for the Future (PRFF) is an effort by the Nebraska Natural Resources Commission (NNRC) to bring together representatives of interests and agencies concerned with management of the Platte River and, assisted by various computer technologies, to reach some degree of agreement on the “best uses” of...
Evaluating environmental and economic consequences of alternative pest management strategies: results of modeling workshops
Richard L. Johnson, Austin K. Andrews, Gregor T.L. Auble, Richard A. Ellison, David B. Hamilton, James E. Roelle, Peter J. McNamee
1983, Report
The U.S. Environmental Protection Agency (EPA) needs a comprehensive method to evaluate the human health and environmental effects of alternative agricultural pest management strategies. This project explored the utility of Adaptive Environmental Assessment (AEA) techniques for meeting this need. The project objectives were to produce models for environmental...
Groundwater observation network design for the Kansas groundwater management districts, U.S.A.
M. Sophocleous
1983, Journal of Hydrology (61) 371-389
Concerns about the efficiency and economic soundness of the Kansas groundwater monitoring program led to a systematic redesign of this network, a tentative phase of which is presented in this study. The objectives of this paper include monitoring of major aquifers within each groundwater management district at a spatially more...
Distribution of larval fishes related to potential navigation impacts on the upper Mississippi River, pool 7
L. E. Holland, J.R. Sylvester
1983, Transactions of the American Fisheries Society (112) 293-301
Ichthyoplankton samples were collected twice monthly during spring and summer 1981 from a variety of habitats in Navigation Pool 7 of the upper Mississippi River. Larval‐fish distributions in the pool and variations in those distributions were analyzed relative to potential impacts of increased commercial navigation. Although as...
Upper Cenozoic silicoflagellates from offshore Ecuador, Deep Sea Drilling Project Site 504
David Bukry
1983, Initial Reports of the D.S.D.P. (69) 321-342
Diverse and abundant late Miocene to Pleistocene silicoflagellates at DSDP Site 504 can be correlated by tropical biostratigraphic zones and relative paleotemperature values to eastern tropical Pacific reference site DSDP 503A farther to the west. Early Pliocene assemblages, which were poorly known until now, are present and can be correlated...
Pressure core barrel; application to the study of gas hydrates, Deep Sea Drilling Project Site 533, Leg 76
Keith A. Kvenvolden, D. Cameron
1983, Initial Reports of the D.S.D.P. (76) 367-375
A pressure core barrel (PCB), developed by the Deep Sea Drilling Project, was used successfully to recover, at in situ pressure, sediments of the Blake Outer Ridge, offshore the southeastern United States. The PCB is a unique, wire-line tool, 10.4 m long, capable of recovering 5.8 m of core (5.8...
Concentrations and carbon isotopic compositions of CH4 and CO2 in gas from sediments of the Blake Outer Ridge, Deep Sea Drilling Project Leg 76
E.M. Galimov, Keith A. Kvenvolden
1983, Initial Reports of the D.S.D.P. (76) 403-407
The principal gaseous carbon-containing components identified in the first 400 m of sediment at Deep Sea Drilling Project Site 533, Leg 76, are methane (CH4 ) and carbon dioxide (CO2 ). Below a sub-bottom depth of about 25 m, sedi ment cores commonly contained pockets caused by the expansion of...
Wildlife guilds in Arizona desert habitats
Henry L. Short
1983, Report
This report summarizes information produced from Interagency Agreement No. AA-851-IA1-27 between the Bureau of Land Management (BLM), USDI, and the Fish and Wildlife Service (FWS), USDI. The contract was instrumental in the final development of wildlife guilds for the Hualapai-Aquarius planning area of the BLM in westcentral Arizona, reported...
Discussion of 'Conflict between establishment of instream flows and other water uses on western streams' by Raymond L. Anderson
Michael A. Collins
1983, Journal of the American Water Resources Association (19) 137-138
No abstract available....
Hydrostratigraphic subdivisions and fault barriers of the Edwards aquifer, south-central Texas, U.S.A.
R.W. Maclay, T. A. Small
1983, Journal of Hydrology (61) 127-146
The karstic Edwards Limestone within the Balcones Fault Zone of south-central Texas forms a productive confined aquifer that consists predominately of dense carbonate rocks and contains several layers of highly permeable and porous honeycombed rocks that have been produced by the leaching of evaporitic, tidal flat or reefal deposits. Fractures...
A system for measuring bottom profile, waves and currents in the high-energy nearshore environment
Asbury H. Sallenger Jr., P.C. Howard, C.H. Fletcher III, P.A. Howd
1983, Marine Geology (51) 63-76
A new data-acquisition system capable of measuring waves, currents and the nearshore profile in breaking waves as high as 5 m has been developed and successfully field-tested. Components of the mechanical system are a sled carrying a vertical mast, a double-drum winch placed landward of the beach, and a line...
Relation of concealed faults to water quality and the formation of solution features in the Floridan aquifer, northeastern Florida, U.S.A.
G.W. Leve
1983, Journal of Hydrology (61) 251-264
Geological and hydrological information on the Floridan aquifer in northeastern Florida indicates that isolated occurrences of water having relatively high chloride concentration in the upper part of the aquifer may be associated with buried faults. Water having chloride concentrations of more than 700 mg l−1 occurs in the deeper zone of...
Late Wisconsin mountain glaciation in the western United States
S.C. Porter, K. L. Pierce, T. D. Hamilton
1983, Book chapter
No abstract available....
