摘要:

Data collected at the Topaz Relocation Center provide an excellent record of the development and subsequent disappearance of a cone of depression caused by pumping. This Center occupied temporarily an area of natural ground‐water discharge on the floor of the Sevier Desert in west‐central Utah. Water for a population of 6500 was pumped from artesian wells which tapped aquifers of sand. Overlying these sand beds are lake‐bed sediments too impermeable to yield water to wells, but apparently permeable enough to permit slow upward movement of water from the artesian aquifers. The water table is near the surface, and there is natural discharge by evapotranspiration, accumulation of “alkali” in the soil, and a need for drainage of irrigated lands. The wells were abandoned when the Relocation Center was closed, apparently because these handicaps were so great that the ground water could not be used profitably for i

ISSN:0002-8606    

DOI:10.1029/TR034i001p00074

年代:1953

数据来源: WILEY

摘要:

The results of tests and a description of the behavior of a tipping‐bucket gage for use in flow measurements are given. Procedures for the use of these devices to obtain as reliable flow data as possible are indicated. It is concluded that, because of the large head room required and the low capacity in addition to the poor hydraulic characteristics, this type of instrument is unsuitable for adoption for general use in the measurement of soil and water runoff from experimental area

ISSN:0002-8606    

DOI:10.1029/TR034i001p00085

年代:1953

数据来源: WILEY

摘要:

The predominant background disturbance on a long‐period vertical seismograph is removed by providing compensation for atmospheric pressure fluctuations. A seismically‐compensated, long‐period microbarovariograph for study of pressure oscillations in the range 20–2000 sec is described. Comparison of records from the pressure‐compensated seismograph and the seismically‐compensated microbarovariograph indicates that no significant ground motion is caused by direct coupling of atmospheric pressure fluctuations to the Earth. Sample record

ISSN:0002-8606    

DOI:10.1029/TR034i001p00095

年代:1953

数据来源: WILEY

摘要:

Specimens of marbles, limestones, and travertine, heated at one atmosphere and at 5000 and 10,000 lb/in2confining pressures, all showed permanent expansion, and of the same order of magnitude even at the highest pressure. Permeability of samples to water solutions (red and blue inks) increased markedly with heating. The mechanism may explain apparent high permeability of carbonate rocks to ore‐bearing solutions when these same rocks have very low permeabilities at room temperature

ISSN:0002-8606    

DOI:10.1029/TR034i001p00101

年代:1953

数据来源: WILEY

摘要:

Considerations of strain energy suggest that either the Gutenberg‐Richter magnitude formula gives the energy of large earthquakes too great by a factor rather greater than ten, or that the fracture‐resisting strength of the material in the focal region of the greatest deep earthquakes is at least of order 500/kg/cm2. It is suggested further that SR½, where S denotes the breaking strength and R the volume of the strained material just prior to an earthquake, has for the greatest deep earthquakes a value at least half that for the greatest shallow earthqu

ISSN:0002-8606    

DOI:10.1029/TR034i001p00107

年代:1953

数据来源: WILEY

摘要:

Remarkably often faults in the Earth's crust are accompanied by volcanoes and lava flows, and that on the uplifted flank. Thus, extensive lava flows follow the east side of the great Syrian‐African depression. I may be permitted to suggest an explanation of this fact.The matter in the Earth's crust behaves like a rigid body; the temperature and the pressure both rise towards the interior, but are so adjusted that no melting occurs except in special cases. It happens that part of the matter passes into a liquid state, called magma, and this again may rise to the surface, pouring out lava flows. Obviously, the actual temperature down in the Earth's crust cannot be far from the melting point; if the pressure is reduced in some way or other, the solid matter may mel

ISSN:0002-8606    

DOI:10.1029/TR034i001p00110

年代:1953

数据来源: WILEY

摘要:

During the year 1950, measurement of the arc along the 101st meridian between latitudes 20° and 30°N was completed. The following geodetic stations were established on this arc during this period: Frailes, Reposa, Salto Colorado, Cerro Grande, Ojito de las Vacas, San Nicolas, Cerritos, Mesa Redonda, Camisa, and Nieves.The Wild T‐3 theodolite was used for observations with 16 circle settings in both positions of the telesc

ISSN:0002-8606    

DOI:10.1029/TR034i001p00111

年代:1953

数据来源: WILEY

摘要:

Special attention has been given to the completion of the observations connected with the tieing‐in of Mexican‐Central America triangulation across the frontier between this country and Guatemala. Figure 1 shows the progress of the operations up to the first days of April, 1952. The unbroken lines represent sides already determined, and the dotted lines are sides in progress in April, 1952. This triangulation starts from the Yucuyacua‐Gavilán side of the triangulation along the 98° meridian and extends to the Tacaná‐Monte Limar side of the Guatemalan triangulation. It consists of 17 figures and 48 stations, of which 37 have been completed and 11 are bein

ISSN:0002-8606    

DOI:10.1029/TR034i001p00112

年代:1953

数据来源: WILEY

摘要:

The year 1951–1952 has been a significant one in the history of upper‐atmosphere research, not because of any single revelation but because a large number of important research projects started shortly after the end of World War II are reaching fruition and being reported. The great activity in this broad field makes it impossible to record all the events of the past year, so this report must merely serve as a brief and very general review. The extensive list of references will make it possible for anyone interested to obtain more deta

ISSN:0002-8606    

DOI:10.1029/TR034i001p00115

年代:1953

数据来源: WILEY

摘要:

The formation of a Division of Oceanography in the Hydrographic Office was announced by Glover [1946], and its early progress was described by Bates and Fleming [1947]. Work in many phases of oceanography has continued.The two oceanographic survey vessels, USSSan PabloandRehoboth, were commissioned late in 1948 [Austin, 1951]. Since that time they have made ten cruises, principally in the Atlantic, carrying out a wide variety of measurement programs [Abel, 1951]. Some of the statistics of the ten cruises are impressive: 206,661 miles steamed; 720 stations occupied; 12,776 bathythermograph slides obtained; 82 cores recovered; 864 days spent at sea.

ISSN:0002-8606    

DOI:10.1029/TR034i001p00122

年代:1953

数据来源: WILEY