Добрый день, Коллеги. Важное сообщение, просьба принять участие. Музей Ферсмана ищет помощь для реставрационных работ в помещении. Подробности по ссылке
Geologists have long maintained that their discipline differs strikingly from chemistry and physics in being historical. There has been almost no explicit consideration by geologists, however, of the particular methodological problems imposed by the historical dimension. Historians and philosophers, on the other hand, have considered the problems of historical method at great length, and in recent years there has been, it seems, an increased interest in the methodology and philosophy of history. It is my purpose here to consider the extent to whieh the issues raised in recent discussions of explanation in human history are pertinent to the problem of explanation in historical geology. Because paleontology presents special methodological problems that I shall later discuss in detail (see pp. 148-70), Ihave omitted at this point any consideration of geological explanations containing paleontological concepts. <...>
The writer wishes to acknowledge the help of Dr. R. E. Grim of the Geology Department of the University of Illinois for supervising this work and for reading and criticizing this paper. Grateful acknowledgement is also made to Dr. W. F. Bradley of the Illinois Geological Survey and to Dr. G. W. Clark of the Chemistry Department of the University of Illinois for helpful suggestions in the theoretical and experimental X-ray work; to Dr. D. T. Englis of the Chemistry Department of the University of Illinois for allowing the use of the microphotometer; to Dr. M. M. Knechtel of the U. S. Geological Survey for making possible the field study of the Wyoming bentonite deposits; to the Baroid Sales Division of the National Lead Company for granting the fellowship under which this work was done and for supplying many of the samples which were used for study and to the geologists and chemists of that organization for allowing the use of their physical property determinations. <...>
After a general introduction to folding this session considers what special terms are required to describe the geometric features of folds: first those terms necessary to define features of a single folded surface, then those which describe the geometric relationships of adjacent folded layers. Special techniques to describe curvature variations based on harmonic—or Fourier—analyses are recommended and it is shown how this type of analysis is practical both for general descriptive purposes as well as for very exact analysis. The relationships of small wavelength folds in polyharmonic folds are described and practical ways of recording changing fold symmetry discussed.
The inflow performance of a well represents the ability of that well to give up fluids. A typical plot is noted in Figure 1.1 and shows how the shapes of the curves may differ. For example, flowing pressure vs rate may be essentially a straight line (water drive and/or pressure above saturation pressure) or it may curve (solution gas’ drive and flow below the bubble point). The ability of a well to give up fluids depends to a great extent upon the type of reservoir and drive mechanism, and such variables as reservoir pressure, permeability, etc. It is common practice to assume that inflow into a particular well with constant conditions is directionally proportional to (Pr). Note curve A in Fig. 1.1 which is a straight line. Normally this is true only for flowing pressures above the bubble point. <...>
The evolution of the global oceanic and atmospheric circulation systems has been affected by several forcing processes, with orbital variations being dominant on shorter geological time scales. Over longer periods of time (>10 Ma) the tectonic evolution of the solid Earth has been recognized as the major control on the development of the global climate system. Tectonic activity acts in one of two different ways to influence regional and global climate. The earliest solid Earthclimatic interaction recognized was the effect that the opening and closure of oceanic gateways had on the circulation patterns in the global ocean. Major effects on regional and sometimes global climate have been attributed to such changes, e.g. closure of the Isthmus of Panama (Driscoll & Haug 1998). Since the late 1980s a second form of climate-tectonic interaction has been recognized, involving the growth and erosion of orogenic belts. In this second category the Arabian Sea region must be considered the global type example. <...>
The Asian continent is the main part of the greatest continental plate—Eurasian plate, on the Earth. The Asian continent covers the tremendous area and has a very long geological history, complex intraplate deformations, a lot of mineral resources and the changeable ecologic environment. Researching the Asian tectonics, which plays a dominant role in the resources and environments, is an interesting subject. With the rapid development of society and economy, it is becoming more and more important, interesting and urgent to re-recognize and understand the relationship between the Asia tectonic evolution and giant ore deposit (including giant or supergiant ore fields and provinces) from the perspective of lithospheric plate tectonics.
Extensional tectonics in the Jeanne d'Arc Basin, offshore Newfoundland: Implications for the timing of break-up between Grand Banks and Iberia
Sequence stratigraphic response to Aptian-Albian rifting in conjugate margin basins: a comparison of the Jeanne d'Arc Basin, offshore Newfoundland, and the Porcupine Basin, offshore Ireland
Early Tertiary evolution and sequence stratigraphy of the Faeroe-Shetland Basin: implications for hydrocarbon prospectivity
1. The timing and location of major ore deposits in an evolving orogen: the geodynamic context
2. Global comparisons of volcanic-hosted massive sulphide districts
3. Tectonic controls on magmatic-hydro-thermal gold mineralization in the magmatic arcs of SE Asia
4. Timing and tectonic controls in the evolving orogen of SE Asia and the western Pacific and some implications for ore generation
5. Correlating magmatic-hydrothermal ore deposit formation over time with geodynamic processes in SE collision Europe
6. Contrasting Late Cretaceous with Neogene ore provinces in the Alpine-Balkan-Carpathian-Dinaride collision belt
7. Auriferous arsenopyritepyrite and stibnite mineralization from the Siflitz-Guginock Area (Austria): indications for hydrothermal activity during Tertiary oblique terrane accretion in the Eastern Alps
The Jurassic and Cretaceous of Sierra Catorce, which yielded the mol-luscan fauna for the first large paleontological monograph on Mexico (Castillo and Aguilera, 1895), comprises from the base: the Oxfordian Huizachal formation and Zuloaga Limestone and the Kimmeridgian to Tithonian La t aja Formation which is overlain by the Valanginian Taraises Formation. I he richly fossiliferous La Caja (— 53 m) is divided into two members. The I I Pastor Member, below, contains two condensed fossiliferous units, one near the base and one near the top; the El Verde Member, above, has sporadically distributed ammonite fauna. <...>
