The geology of the country around Heathfield,Sussex: With report of excursion to heathfield,brightling, netherfield and robertsbridge. Saturday,June 4th, 1921     

Henry B. Milner 《Proceedings of the Geologists' Association. Geologists' Association》1922,33(2):142-151

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The Petrography of rock-samples from the miocene deposits,etc., of the Bordeaux District     

Henry B. Milner 《Proceedings of the Geologists' Association. Geologists' Association》1929,40(3):299-306

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Correlation of atmospheric occurences over the United States with some physical and chemical parameters. Part I: Frequences of thunderstorms     

T. W. Zawidzki  Alberto C. Montefinale  Henry M. Papée 《Pure and Applied Geophysics》1963,54(1):196-201

Summary A multiple regression analysis has been carried out to obtain some approximate insight into conditions which might favour the occurence of thunderstorms, in terms of certain parameters measured on the ground. It is thought that annual thunderstorm frequencies may largely depend on local temperature parameters and deviations of precipitable water vapour from equilibrium values.Contribution of the «Centro Nucleazione Aerosoli» of the National Research Council of Italy, Via Vettore 4 (Monte Sacro),Roma.  相似文献   

A search for flow structure in columnar basalt using magnetic anisotropy measurements     

Henry C. Brown  M. Aftab Khan  Frank D. Stacey 《Pure and Applied Geophysics》1964,57(1):61-65

Summary Evidence for flow structure within hexagonal columns of basalt has been sought, using measurements of the anisotropy of magnetic susceptibility. The observed magnetic grain alignment indicates that the flow was essentially uniform and horizontal across the hexagons which were sampled. The flow probably occurred during emplacement of the lava; there is no evidence of convection within the hexagons, either from the degree of grain alignment or its orientation.  相似文献   

Composite magnetic fabric deciphered using heating treatment     

B. Henry  D. Jordanova  N. Jordanova  M. E. M. Derder  B. Bayou  M. Amenna  D. Dimov 《Studia Geophysica et Geodaetica》2007,51(2):293-314

In a number of AMS studies, the presence and deciphering of composite magnetic fabrics is of major importance for a correct interpretation of the data. On the basis of several examples from intrusive rocks (diorites and dolerites) we show that the use of laboratory heatings can help to extract at least one component of the composite magnetic fabrics usually present. The procedure includes comparison of the fabrics measured after stepwise laboratory heating with the fabrics determined by tensor difference and by linear regression analysis. In the diorite samples, the measured AMS results from the superimposition of different component fabrics and does not correspond exactly to any of these fabrics. In these dykes, isolated magnetic fabric during thermal treatment corresponds to that of the main magnetic mineral (Ti-poor titanomaghemite) and reveals an unknown structure. In volcanic flow or doleritic dykes, a “parasitic” fabric related to late or post-magmatic evolution superimposed to the flow fabric can produce important scattering of the AMS principal directions. Decomposition of magnetic fabric during thermal treatment allows isolation of the flow fabric.  相似文献   

Climate and cultural history in the Americas: An overview     

Henry F. Diaz  David W. Stahle 《Climatic change》2007,83(1-2):1-8

There is abundant historical evidence that climatic extremes in the past have led to significant and sometimes severe societal impacts. The severity of these impacts depends on the intensity and duration of the climatic event, social organization, and the prevailing socioeconomic conditions at the time of the climatic extreme. In this issue of Climatic Change we present the results from 12 studies, which document climatic extremes on different time scales and provide interesting evidence for direct and indirect social impacts of climatic changes in the Americas during the pre-Hispanic, colonial, and modern eras.  相似文献   

Incoherent SAR polarimetric analysis over point targets     

Inglada  J. Souyris  J.-C. Henry  C. Tison  C. 《Geoscience and Remote Sensing Letters, IEEE》2006,3(2):246-249

In this letter, we show that the polarimetric behavior of point targets is preserved even in the case of multipolarization incoherent acquisitions. Point targets are defined as targets embedded in one image pixel and presenting a very stable backscatter during the integration time. We discuss in particular how the polarimetric response restoration can be helpful for point target detection and analysis from such acquisitions (e.g., ASAR Alternate Polarization mode of ENVISAT), but also for permanent scatterers interferometry applications.  相似文献   

The Southern Region of Peru Earthquake of June 23rd, 2001     

Hernando Tavera  Efraín Fernández  Isabel Bernal  Yanet Antayhua  Consuelo Agüero  Henry Salas Simeón Rodríguez  Luis Vilcapoma  Yolanda Zamudio  David Portugal  Adolfo Inza  Julia Carpio  Freddy Ccallo  Igor Valdivia 《Journal of Seismology》2006,10(2):171-195

The western border of South America is one of the most important seismogenic regions in the world. In this region the most damaging earthquake ever recorded occurred. In June 23rd, 2001, another very strong earthquake (Mw = 8.1–8.2) occurred and produced death and damages in the whole southern region of Peru. This earthquake was originated by a friction process between Nazca and South American plates and affected an area of about 300 km × 120 km defined by the distribution of more than 220 aftershocks recorded by a local seismic network that operated 20 days. The epicenter of the main shock was localized in the northwestern extremity of the aftershock area, which suggests that the rupture propagated towards the SE direction. The modeling of P-wave for teleseismic distances permitted to define a focal mechanism of reverse type with NW-SE oriented nodal planes and a possible fault plane moving beneath almost horizontally in NE direction. The source time function (STF) suggests a complex process of rupture during 85 sec with 2 successive sources. The second one of greater size, and located approximately 100–120 km toward the SE direction was estimated to have a rupture velocity of about 2 km/sec on a 28°-dipping plane to the SE (N135°). A second event happened 45 sec after the first one with an epicenter 130km farther to the SE and a complex STF. This event and the second source of the main shock caused a Tsunami with waves from 7 to 8 meters that propagated almost orthogonally to the coast line, by affecting mainly the Camaná area.Three of all the aftershocks presented magnitudes greater or equal to Mw = 6.6, two of them occurred in front of the cities of Ilo and Mollendo (June 26th and July 7th) with focal mechanisms similar to the main seismic event. The aftershock of July 5th shows a normal mechanism at a depth of 75 km, and is therefore most likely located within the subducting Nazca plate and not in the coupling. The aftershocks of June 26th (Mw = 6.6) and July 5th (Mw = 6.6) show simple short duration STF. The aftershock of July 7th (Mw = 7.5) with 27-second duration suggests a complex process of energy release with the possible occurrence of a secondary shock with lower focal depth and focal mechanism of inverse type with a great lateral component. Simple and composed focal mechanisms were elaborated for the aftershocks and all have similar characteristics to the main earthquake.The earthquake of June 23rd caused major damages in the whole southern Peru. The damage in towns of Arequipa, Moquegua allow to consider maximum intensities from 6 to 7 (MSK79). In Alto de la Alianza and Ciudad Nueva zones from Tacna, the maximum intensity was of 7⁻ (MSK79).  相似文献   

Controls by saturation state on etch pit formation during calcite dissolution   总被引：1，自引：0，他引：1  

H.Henry Teng 《Geochimica et cosmochimica acta》2004,68(2):253-262

Dissolution experiments were conducted on {101?4} cleavage faces of calcite at various under-saturations to determine how the saturation state controls etch pit formation. Experimental observations were made by using in situ fluid cell Atomic Force Microscopy. Three dissolution modes were observed. When the saturation index Ω > 0.541, no etch pit formation was seen and dissolution primarily occurred at existing steps. When Ω decreased to Ω_c = 0.541-0.410, the first visible pits appeared and continuous reduction in saturation state slowly increased the pit density on terraces while dissolution simultaneously proceeded at step edges. Finally, when the saturation state fell below Ω_max = ∼0.007, a precipitous increase in pit density took place that sharply contrasted to the ordered fashion of pit formation observed at saturation conditions above this level. These observations are interpreted to be two-dimensional and unassisted pit formation at Ω < ∼0.007, defect- and step-assisted dissolution in between Ω = 0.541 and 0.007, and existing step-induced dissolution for Ω > 0.541.The values of Ω_c are in good agreement with the dislocation theory's predicted critical under-saturations for pit formation at line dislocations. The occurrence of Ω_max is not directly predicted but is a logical consequence of dissolution thermodynamics. These findings suggest that (1) dissolution near and far from equilibrium (i.e., Ω > Ω_c, Ω < Ω_max) is not controlled by dislocations, therefore (2) dislocation density should significantly impact dissolution rate only in the saturation range of Ω_max < Ω < Ω_c; (3) dissolution kinetics and chemical affinity of dissolution reactions should have a non-linear relationship: at sufficiently close to equilibrium, when dislocations cannot open up to form etch pits, the dissolution kinetics will be limited by the number of existing steps; at far from equilibrium, when pits are able to form in defect-free regions, the dissolution rate will be capped by the maximum number of achievable steps.These findings may provide explanations for several well-observed geochemical relationships, including the weak dependence of dissolution rate upon dislocation density in distilled water and the ‘plateau’ behavior of dissolution kinetics both near and far from equilibrium. The explosive occurrence of unassisted pit nucleation at Ω ∼ Ω_max is not predicted by the current dissolution rate equations. This suggests that an accurate ‘general’ rate law describing universal dissolution processes has yet to be developed.  相似文献   

Mono Lake or Laschamp geomagnetic event recorded from lava flows in Amsterdam Island (southeastern Indian Ocean)   总被引：1，自引：0，他引：1  

Claire Carvallo  Pierre Camps  Gilles Ruffet  Bernard Henry  T. Poidras 《Geophysical Journal International》2003,154(3):767-782

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