Shocked quartz in the Cretaceous-Tertiary boundary clays: Evidence for a global distribution
Bruce F. Bohor, P.J. Modreski, Eugene E. Foord
1987, Science (236) 705-709
Shocked quartz grains displaying planar features were isolated from Cretaceous- Tertiary boundary clays at five sites in Europe, a core from the north-central Pacific Ocean, and a site in New Zealand. At all of these sites, the planar features in the shocked quartz can be indexed to rational crystallographic planes...
The Martian surface
M. H. Carr
1987, Reviews of Geophysics (25) 285-292
The past four years have been particularly fruitful for Martian research as the enormous volumes of data collected during the Viking mission became readily available to the general science community, and as reformatting of the remote sensing data into cartographic products made the data more useable. The 1:5,000,000‐scale map series...
Quantitative studies of biodegradation of petroleum and some model hydrocarbons in ground water and sediment environments: Chapter 20
Fu-Hsian Chang, M. F. Hult, N.N. Noben
Deborah M. Fairchild, editor(s)
1987, Book chapter, Ground-water quality and agricultural practices
No abstract available....
Applications of spatial postclassification models
Eugene A. Fosnight
1987, Conference Paper, Proceedings of the 21st International Symposium on Remote Sensing of Environment
No abstract available....
Sino-American cooperative studies on applications of remote sensing to surveying and mapping
D. T. Lauer, C. Liangcai
1987, Conference Paper, Proceedings of the 21st International Symposium on Remote Sensing of Environment
No abstract available....
Delayed maturation, neoteny, and social system differences in two manakins of the genus Chiroxiphia
Mercedes S. Foster
1987, Evolution (41) 547-558
Long‐tailed manakins (Chiroxiphia linearis) and swallow‐tailed manakins (C. caudata) are closely related, sexually dichromatic, lek‐breeding species in which male mating success is highly skewed. Males of both species delay plumage maturation. Before reaching the definitive state, they wear a sequence of feather coats less conspicuous than that of the adult....
Book review of The Stability of Slopes, by E.N. Bromhead, Chapman and Hall, New York, 373. p.
Richard M. Iverson
1987, Geology (15) 477
No abstract available....
Overview of geomagnetism and paleomagnetism, 1983–1986
Richard J. Blakely
1987, Reviews of Geophysics (25) 895-899
Michael Fuller, author of a similar overview four years ago, concluded that “...the next quadrennium promises to be a most interesting one, with plenty to keep us busy.” The 11 review papers that follow support his prediction; research in geomagnetism and paleomagnetism indeed has flourished over the last four years....
Geology of the Mount St. Helens area: Record of discontinuous volcanic and plutonic activity in the Cascade Arc of southern Washington
Russell C. Evarts, Roger P. Ashley, J.G. Smith
1987, Journal of Geophysical Research B: Solid Earth (92) 10155-10169
The Quaternary edifice of Mount St. Helens volcano was built upon a deeply eroded terrane of gently folded and altered volcanic and plutonic rocks that represent the core of the Tertiary Cascade magmatic arc. These rocks constitute an east dipping homoclinal sequence, several kilometers thick, of subaerially erupted mafic to...
Remote sensing of the Fram Strait marginal ice zone
R.A. Shuchman, B.A. Burns, O.M. Johannessen, E.G. Josberger, W. J. Campbell, T.O. Manley, N. Lannelongue
1987, Science (236) 429-431
Sequential remote sensing images of the Fram Strait marginal ice zone played a key role in elucidating the complex interactions of the atmosphere, ocean, and sea ice. Analysis of a subset of these images covering a 1-week period provided quantitative data on the mesoscale ice morphology, including ice edge positions,...
Increased solubility of quartz in water due to complexing by organic compounds
P. Bennett, D. I. Siegel
1987, Nature (326) 684-686
Quartz is the most stable natural solid phase of silica. It weathers extremely slowly at the Earth's surface1, and often resists weathering even after all other silicate minerals have been degraded. However, there is ample evidence from both ancient and modern environments indicating enhanced dissolution and mobility of silica under...
Comparative efficacy of 16 anesthetic chemicals on rainbow trout
P.A. Gilderhus, L. L. Marking
1987, North American Journal of Fisheries Management (7) 288-292
Presently there are no legally registered fish anesthetics that allow for the release of fish or use of the fish for food soon after they have been anesthetized. MS-222 (tricaine), the only anesthetic registered for use on fish in the United States, cannot be used within 21 d of harvesting...
Arabian Shield ophiolites and Late Proterozoic microplate accretion
John S. Pallister, J. S. Stacey, L. B. Fischer, Wayne R. Premo
1987, Geology (15) 20-323
Fragments of Late Proterozoic ocean crust and mantle (ophiolites) occur within six major fault zones that mark sutures between crustal blocks (microplates) that were accreted between about 630 and 715 Ma to form the Arabian Shield. We report new U-Pb zircon ages for ophiolitic gabbro, diorite, and plagiogranite that range...
Transponders as permanent identification markers for domestic ferrets, black-footed ferrets, and other wildlife
Kathleen A. Fagerstone, Brad E. Johns
1987, Journal of Wildlife Management (51) 294-297
A 0.05-g transponder implanted subcutaneously was tested to see if it provided a reliable identification method. In laboratory tests 20 domestic ferrets (Mustela putorius furo) received transponders and were monitored for a minimum of 6 months. None showed signs of inflammation, and necropsies conducted at the end of...
A transect across the Mesozoic accretionary margin of central California
Carl M. Wentworth, Mark D. Zoback, Andrew Griscom, Robert C. Jachens, Walter D. Mooney
1987, Geophysical Journal International (89) 105-110
No abstract available....
Crustal structure beneath exposed accreted terranes of Southern Alaska
Gary S. Fuis, E. L. Ambos, Walter D. Mooney, R.A. Page, Michael A. Fisher, Thomas M. Brocher, J.J. Taber
1987, Geophysical Journal International (89) 73-78
The crustal structure beneath the exposed terranes of southern Alaska has been explored using coincident seismic refraction and reflection profiling. A wide-angle reflector at 8-9 km depth, at the base of an inferred low-velocity zone, underlies the Peninsular and Chugach terranes, appears to truncate their boundary, and may represent...
Role of fire in the seed germination of woody taxa in California chaparral
Jon E. Keeley
1987, Ecology (68) 434-443
No abstract available....
Fall and winter foods of northern pintails in the Sacramento Valley, California
Michael R. Miller
1987, Journal of Wildlife Management (51) 405-415
Food habits of northern pintails (Anas acuta) were investigated on 3 national wildlife refuges in the western portion of the Sacramento Valley, California, from August to March 1979-82. Pintails consumed >97% (aggregate % dry wt) plant food during diurnal foraging on national wildlife refuge rice, summer- irrigated, and summer-dry habitats...
Habitat selection and management of the Hawaiian crow
Jon G. Giffen, J. Michael Scott, Stephen Mountainspring
1987, Journal of Wildlife Management (51) 485-494
The abundance and range of the Hawaiian crow, or alala, (Corvus hawaiiensis) have decreased drastically since the 1890's. Fewer than 10 breeding pairs remained in the wild in 1985. A sample of 82 nests during 1970-82 were used to determine habitat associations. Two hundred firty-nine alala observations were used to...
Migration of mid-ocean-ridge volcanic segments
Hans Schouten, H.J.B. Dick, Kim D. Klitgord
1987, Nature (326) 835-839
The propagation of small-offset volcanic spreading-centre segments along mid-ocean ridge crests may reflect absolute motion of the plate boundary relative to the underlying mesospheric frame. Such a relationship could be caused by a purely vertical flow of the mantle under spreading centres and would have value in constraining past plate...
Spatial relations between sympatric coyotes and red foxes in North Dakota
Alan B. Sargeant, Stephen H. Allen, James O. Hastings
1987, Journal of Wildlife Management (51) 285-293
Spatial relations between coyotes (Canis latrans) and red foxes (Vulpes vulpes) on a 360-km2 area in North Dakota were studied during 1977-78. Coyote families occupied large (mean = 61.2 km2), relatively exclusive territories that encompassed about one-half of the study area. Fox families occupied much smaller (mean = 11.9 km2),...
Water-quality trends in the nation's rivers
Richard A. Smith, Richard B. Alexander, M. G. Wolman
1987, Science (235) 1607-1615
Water-quality records from two nationwide sampling networks now permit nationally consistent analysis of long-term water-quality trends at more than 300 locations on major U.S. rivers. Observed trends in 24 measures of water quality for the period from 1974 to 1981 provide new insight into changes in stream quality that occurred...
Is courtship intensity a signal of male parental care in Red-winged Blackbirds (Agelaius phoeniceus)?
Ken Yasukawa, Richard L. Knight, Susan Knight Skagen
1987, The Auk (104) 628-636
We studied Red-winged Blackbird (Agelaius phoeniceus) behavior in marsh and prairie habitats to determine whether courting males provide cues of their nest defense, whether females prefer males that defend nests vigorously, and whether male nest defense affects nest success. We found no evidence that courtship behavior provides cues of male...
Cumulative impacts assessment: an application to Chesapeake Bay
1987, Book, Cumulative impacts assessment: an application to Chesapeake Bay
No abstract available....
Late Eocene impact microspherules: Stratigraphy, age and geochemistry
G. Keller, Steven L. D’Hondt, C. J. Orth, J. S. Gilmore, P. Q. Oliver, Eugene Merle Shoemaker, E. Molina
1987, Meteoritics (22) 25-60
Recent discoveries of microtektite and related crystal bearing microspherule layers in deep-sea sediments of the west equatorial Pacific DSDP Sites 292, 315A and 462, off-shore New Jersey in Site 612 and in southern Spain have confirmed the presence of at least three microspherule layers in Late Eocene sediments. Moreover, these...
