DDE thins eggshells of captive American kestrels
Stanley N. Wiemeyer, Richard D. Porter
1970, Nature (227) 737-738
EGGSHELL thinning in several species of raptorial and fish-eating birds, whose populations and/or reproductive success have declined dramatically in recent years, has been correlated with residues of DDE [1,1-dichloro-2,2-bis (p-chlorophenyl) ethylene] in their eggs1–3. DDE, a common metabolite of DDT [1,1,1-trichloro-2,2-bis(p-chlorophenyl) ethane] and a nearly universal contaminant in the food of...
Geochronology of Tertiary igneous rocks in central Nevada
Edwin H. McKee, Miles L. Silberman
1970, Bulletin of the Geological Society of America (81) 2317-2327
Potassium-argon dating of Tertiary igneous rocks in Lander County, central Nevada, indicates that igneous activity was episodic and can be separated into three periods. Igneous activity started abruptly about 37 m.y. ago with local extrusion of andesitic to quartz-latitic lava flows and intrusion of hypabyssal rocks of similar composition. This...
Latitude dependence of the angular dispersion of the geomagnetic field
Allan Cox
1970, Geophysical Journal International (20) 253-269
Changes in the direction of the Earth's magnetic field at a given site are produced in part by wobble of the main geomagnetic dipole, in part by fluctuations in the intensity and direction of the non-dipole field, and in part by changes in the intensity of the main dipole...
Treasure Hill reinterpreted
Roscoe M. Smith
1970, Economic Geology (65) 538-540
No abstract available....
Computer ray tracing through complex geological models for ground motion studies
Nazieh K. Yacoub, James H. Scott, F. A. McKeown
1970, Geophysics (35) 586-602
No abstract available....
Apollo 11: Exposure of lower animals to lunar material
C.A. Benschoter, T.C. Allison, J.F. Boyd, M.A. Brooks, J.W. Campbell, R.O. Groves, A.M. Heimpel, H.E. Mills, S.M. Ray, J.W. Warren
1970, Science (169) 470-472
Lunar material returned from the first manned landing on the moon was assayed for the presence of replicating agents possibly harmful to life on earth. Ten species of lower animals were exposed to lunar material for 28 days. No pathological effects attributable to contact with lunar material were detected....
Deuterium content of snow cores from Sierra Nevada area
I. Friedman, G.I. Smith
1970, Science (169) 467-470
The relative deuterium content was measured on 37 snow cores collected in April 1969 in the Sierra Nevada. The deuterium content varies inversely with altitude of collection (approximately 40 per mil per 1000 meters) but is unrelated to latitude. The altitude relationship is particularly well defined west of the crest...
Arctic paleo-oceanography in late Cenozoic time
Y. Herman
1970, Science (169) 474-477
Sediment cores from the Arctic Ocean yield significant faunal and lithologic evidence of alternating cold and milder periods for the last 6 million years. Although high-latitude continental glaciation commenced prior to 6 million years ago, the Arctic Ocean remained free of permanent pack ice up to approximately 0.7 million years...
Petrified peat from a Permian coal bed in Antarctica
J. M. Schopf
1970, Science (169) 274-277
Petrified plant remains that composed a Permian peat deposit occur at a coal horizon in a local area of Mount Augusta near the Beardmore Glacier in Antarctica. This discovery is the first in the entire Gondwana area that yields plant materials as exquisitely preserved as the materials of the well-known...
Nuclear explosions and distant earthquakes: A search for correlations
J. H. Healy, P.A. Marshall
1970, Science (169) 176-177
An apparent correlation between nuclear explosions and earthquakes has been reported for the events between September 1961 and September 1966. When data from the events between September 1966 and December 1968 are examined, this correlation disappears. No relationship between the size of the nuclear explosions and the number of distant...
Deformation twins in Hornblende
T.P. Rooney, R.E. Riecker, M. Ross
1970, Science (169) 173-175
Hornblende deformation twins with twin planes parallel to (¯101) are produced experimentally in single crystals by compression parallel to the c axis. Twinning occurs at...
Radiogenic heat production of contrasting magma series: Bearing on interpretation of heat flow
Robert I. Tilling, David Gottfried, F. C. W. Dodge
1970, GSA Bulletin (81) 1447-1462
Variation in radiogenic heat production of rocks of diverse magma series (representative of calcic, calc-alkalic, alkali-calcic, and alkalic petrographic provinces on a worldwide basis) is better correlated with some form of magmatic differentiation index, rather than simply with potassium content alone as commonly supposed. The “lime-alkali” (Peacock) index generally gives...
Propagation of captive American kestrels
Richard D. Porter, Stanley N. Wiemeyer
1970, Journal of Wildlife Management (34) 594-604
A colony of kestrels (Palco sparverius) was established at the Patuxent Wildlife Research Center in 1964 in connection with work on pesticides. The kestrels were acquired from the wild, both as nestlings and as full-grown birds, and were housed in several rows of outdoor pens. Each 50 x 20 ft...
Summary of regional evidence for right-lateral displacement in the western Great Basin: Reply
John H. Stewart, John P. Albers, Forrest G. Poole
1970, Bulletin of the Geological Society of America (81) 2175-2179
No abstract available....
4 Earthquake: Major offshore earthquakes recall the Aztec myth
United States Department of Commerce
1970, Earthquake Information Bulletin (USGS) (2) 4-7
Long before the sun clears the eastern mountains of April 29, 1970, the savanna highlands of Chiapas tremble from a magnitude 6.7 earthquake centered off the Pacific coast near Mexico’s southern border. Then, for a few hours, he Isthmus of Tehuantepec is quiet....
Boulder Creek batholith, Colorado part I: Allanite and its bearing upon age patterns
Nelson L. Hickling, George Phair, Roosevelt Moore, Harry J. Rose Jr.
1970, Bulletin of the Geological Society of America (81) 1973-1993
Allanite is abundant and commonly attains unusually large size as a late-replacement mineral in: (1) the comagnatic rocks of the Precambrian Boulder Creek batholith; (2) associated amphibolite xenoliths and related hybrid rocks; and (3) distinctly younger intrusions of Silver Plume Granite that cut the complex. Allanite porphyroblasts develop by replacement...
The Bluebell Mine, British Columbia: I. Mineralogy, paragenesis, fluid inclusions, and the isotopes of hydrogen, oxygen, and carbon
Hiroshi Ohmoto, Robert O. Rye
1970, Economic Geology (65) 417-437
No abstract available....
Content of zinc and copper in some fluid inclusions from the Cave-in-Rock district, southern Illinois
Darrell M. Pinckney, Joseph Haffty
1970, Economic Geology (65) 451-458
No abstract available....
An outbreak of fowl cholera in waterfowl on the Chesapeake Bay
L. N. Locke, V. Stotts, G. Wolfhard
1970, Journal of Wildlife Diseases (6) 404-407
An outbreak of fowl cholera (Pasteurella multocida infection) occurred in waterfowl wintering on the Chesapeake Bay during February to March 1970. Losses were primarily confined to sea ducks: oldsquaws (Clangula hyemalis), white-winged scoters (Melanitta deglandi), golden-eyes (Bucephala clangula), and buffleheads (Bucephala albeola)....
A microsporidan (Protozoa: Cnidospora) in channel catfish (Ictalurus punctatus)
R. L. Herman, R.E. Putz
1970, Journal of Wildlife Diseases (6) 173-173
No abstract available. ...
Saline ground-water resources of the Tularosa Basin, New Mexico
J. S. McLean
1970, Research and Development Progress Report 561
This report describes the location, extent, and quality of saline ground water in the Tularosa Basin, a north-trending elongated, intermontane, desert basin in south-central New Mexico. There are no through-flowing streams; runoff from the bordering mountains flows to ephemeral lakes in the center of the basin. Fresh-water supplies in the Tularosa...
California earthquakes: Why only shallow focus?
W.F. Brace, J.D. Byerlee
1970, Science (168) 1573-1575
Frictional sliding on sawcuts and faults in laboratory samples of granite and gabbro is markedly temperature-dependent. At pressures from 1 to 5 kilobars, stick-slip gave way to stable sliding as temperature was increased from 200 to 500 degrees Celsius. Increased temperature with depth could thus cause the abrupt disappearance of...
Geological history of the western North Pacific
A.G. Fischer, B.C. Heezen, R.E. Boyce, D. Bukry, R.G. Douglas, R.E. Garrison, S.A. Kling, V. Krasheninnikov, A.P. Lisitzin, A.C. Pimm
1970, Science (168) 1210-1214
A considerable portion of the abyssal floor of the western North Pacific was already receiving pelagic sediment in late Jurassic time. Carbonate sediments were later replaced by abyssal clays as the basin deepened and bottom waters became more aggressive. The resulting facies boundary, which can be recognized on seismic profiles,...
Residues of O,P'-DDD and O,P'-DDT in brown pelican eggs and mallard ducks
T. G. Lamont, George E. Bagley, W. L. Reichel
1970, Bulletin of Environmental Contamination and Toxicology (5) 231-236
No abstract available....
Identification of polychlorinated biphenyls in two bald eagles by combined gas-liquid chromatography-mass spectrometry
George E. Bagley, W. L. Reichel, E. Cromartie
1970, Journal of the Association of Official Analytical Chemists (53) 251-261
Polychlorinated biphenyls are widely used industrial compounds marketed in the United States under the trade name Aroclor. They have appeared in fish and wildlife tissues in this country and Europe. They are known to be toxic, but more importantly, their presence in samples along with the commonly occurring organochlorine pesticides...
