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1. |
AGU advocacy for science |
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Eos, Transactions American Geophysical Union,
Volume 71,
Issue 15,
1990,
Page 385-385
H. Frank Eden,
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摘要:
The Gulf Coast province provides an array of scientific dilemmas ranging from the origin of the gulf itself to the causes and effects of long‐lasting circulation of hot, deep waters throughout the thick sedimentary section. The nature of the underlying crust and superjacent sediments and their contained waters; the precise timing of rifting; depositional history and diagenesis of the sedimentary sequence; fluid dynamics; geochemistry; hydrocarbon generation and migration; thermal history, including unusually high thermal gradient; and the fluid pressure regime in the deep sedimentary section are too poorly understood to permit quantitative analysis of processes that are of enormous scientific and practical importance. The area centered on DeWitt and Victoria counties, Texas, on the southeastern extension of the San Marcos arch, is probably the best location for a deep borehole to investigate these important phenomena and problems. The arch extends southeastward from exposed Grenville‐age basement rocks of the Llano uplift and separates the deep South Texas and Houston embayment salt basins. Seaward of the Llano uplift, highly deformed and slightly metamorphosed rocks of the Ouachita‐Marathon orogen have been intersected beneath Cretaceous sediments. The inferred edge of continental crust underlies an extensive Lower Cretaceous reef trend southeast of known Ouachita orogen rocks. Rapid thickening of Tertiary and possibly of Cretaceous sediments southeast of the shelf edge, together with geophysical indications of a relatively shallow Moho, suggests that “transitional continental crust” underlies sediments basinward of the inferred edge of continental crust. This transitional crust, the ultimate objective for a proposed deep well, could be rifted Grenville basement, buried rocks of the Ouachita trend, an island arc related to the Ouachita trend, or exotic continental basement related to a proto‐South American continent. To achieve optimum results to guarantee adequate basement penetration, a borehole should be designed to penetrate a relatively thin succession of lower Mesozoic synrift, graben‐fill sediments seaward of the shelf edge. Because of expected high temperatures and pressures, new technologies will need to be developed to successfully drill and
ISSN:0002-8606
DOI:10.1029/EO071i015p00385-01
年代:1990
数据来源: WILEY
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2. |
SuperWAGS Campaign |
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Eos, Transactions American Geophysical Union,
Volume 71,
Issue 15,
1990,
Page 386-386
Anonymous,
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PDF (130KB)
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摘要:
In the 30 years since the publication of the paper by Colin Hines on Atmospheric Gravity Waves (AGW) in the ionosphere, hundreds of papers describing theoretical and experimental investigations of AGW sources and propagation phenomena have been published (see reviews byYeh and Liu[1974],Francis[1975] andHunsucker[1982]). Several global campaigns called “Worldwide Atmospheric Gravitywave Studies (WAGS)” [Argo and Hunsucker, 1985] have been carried out, and results of the WAGS 1 campaign of October 14–19, 1985, were reported in a special issue ofRadio Science[Argo and Hunsucker, 1988] and in several other jou
ISSN:0002-8606
DOI:10.1029/EO071i015p00386
年代:1990
数据来源: WILEY
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3. |
Senate passes clean air bill |
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Eos, Transactions American Geophysical Union,
Volume 71,
Issue 15,
1990,
Page 387-387
Anonymous,
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PDF (142KB)
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摘要:
In an 89 to 11 vote the Senate passed a clean air bill aimed at reducing pollution by the turn of the century by imposing tougher controls on American industry. The bill is the first revision of the Clean Air Act of 1970 in 13 years and calls for new limits on auto pollution to clean up smog in most U.S. cities, decreasing by half emissions by power plants that cause acid rain to protect the ecology, and increasing technological controls on factories to protect against cancer‐causing and toxic substances. The bill will add about $20 billion per year to the estimated $33 billion cost of complying with current pollution law
ISSN:0002-8606
DOI:10.1029/EO071i015p00387-01
年代:1990
数据来源: WILEY
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4. |
Geothermal evidence of climatic change |
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Eos, Transactions American Geophysical Union,
Volume 71,
Issue 15,
1990,
Page 390-391
Anonymous,
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PDF (112KB)
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摘要:
Borehole temperature data from many geographic areas and new perspectives on the data, including the possibility of climatic change was the focus of the workshop Geothermal Evidence Revelant to Questions of Climatic Change, held in San Francisco, Calif., December 3, 1989, before the AGU Fall Meeting. About 30 people attended, representing many geothermal research laboratories in the United States and Canada.
ISSN:0002-8606
DOI:10.1029/EO071i015p00390
年代:1990
数据来源: WILEY
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5. |
Fencing position |
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Eos, Transactions American Geophysical Union,
Volume 71,
Issue 15,
1990,
Page 394-394
G. Shaw,
P. Eagleson,
A. Gordon,
S. Smith,
M. Settle,
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PDF (130KB)
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摘要:
It is clear that most actions taken by Congress have been the result of pressure by constituents. At the 1989 fall meeting of the AGU Council, a Union position on fencing was approved, which said such pressure by members of AGU did not meet professional standards. Fencing refers to the practice of protecting parts of agency budgets from reduction, denying agency administrators the latitude to adjust such parts in response to changing appropriations for the agency. Recent actions by members of Congress to counteract efforts to circumvent peer review clearly indicate that there is support in Congress for the scientific integrity of the research funding process by the federal government. AGU's fencing position (below) supports such actions and the continued need for scientific integrity in the funding of research. Your support of the position is requested.
ISSN:0002-8606
DOI:10.1029/EO071i015p00394-01
年代:1990
数据来源: WILEY
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