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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Asia
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Central Asia
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Kazakhstan
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Primary terms
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Asia
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Mesozoic
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Cretaceous
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Washita Group (1)
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Upper Cretaceous
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Cenomanian (1)
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Gulfian
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Eagle Ford Formation (1)
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Turonian (1)
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metal ores
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antimony ores (1)
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metals
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United States
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Maine
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Sagadahoc County Maine (1)
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New England (1)
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Texas
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East Texas Basin (1)
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San Marcos Arch (1)
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sedimentary rocks
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sedimentary rocks
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Eaglebine play of the southwestern East Texas basin: Stratigraphic and depositional framework of the Upper Cretaceous (Cenomanian–Turonian) Woodbine and Eagle Ford Groups
Raman spectroscopic and microscopic criteria for the distinction of microdiamonds in ultrahigh-pressure metamorphic rocks from diamonds in sample preparation materials
Potassic-aluminotaramite from Sierra de los Filabres, Spain
Aluminotaramite, alumino-magnesiotaramite, and fluoro-alumino-magnesiotaramite: Mineral data and crystal chemistry
Earliest Steps of Diagenesis in Living Scleractinian Corals: Evidence from Ultrastructural Pattern and Raman Spectroscopy
A review of the non-destructive identification of diverse geomaterials in the cultural heritage using different configurations of Raman spectroscopy
Abstract Non-destructive Raman microscopy (RM) applied to geomaterials in the cultural heritage is reviewed by means of explaining selected examples representative of the different kinds of geomaterials that can be characterized and of the different kinds of analytical configuration that can be employed. To explain the versatility and considerable analytical potential of RM that result from its unique combination of capabilities, the first sections summarize the theory and practice of the method and its advantages and disadvantages. The most modern configurations (mobile RM (MRM) and ultra-mobile RM; micro-mapping and imaging; telescopy) are described. Applications in the new age of ‘don’t move it, don’t even touch it’ archaeometry have previously been classified into 10 domains, seven of which concern geomaterials: gems; rocks; ceramics; corroded metals; coloured vitreous materials; and mineral pigments on an inorganic or organic substrate. The representative examples here include all these domains and cover the time range from Prehistoric through Egyptian, Roman, Meso-American, Medieval, Chinese, Renaissance and Mogul cultures to modern colouring of glass and a contemporaneous simulation of submarine archaeology.
Abstract It is said that during a voyage to Europe in the summer of 1921, the Indian physicist Chandrasekhara Venkata Raman (1888–1970) looked at the wonderful blue opalescence of the Mediterranean Sea and questioned where the sea's blue colour came from and why it should be different from the sky's blue. Raman started a series of experiments to address these questions, and he found the blue colour of the sea was not merely due to simple reflection of the sky in water, as most people imagined, but was additionally affected by molecular scattering of light. This led to the discovery of a new inelastic scattering process that is the optical analogue of the “Compton effect”; it is nowadays known as the “Raman effect”. It describes a change in the wavelength of light that occurs when a light beam interacts with molecular vibrations. The possibility for such interaction between matter and light had already been predicted theoretically by Smekal (1923) . The first verification was obtained by Raman and Krishnan (1928) in light scattering experiments on liquids. Only two years later, Sir C.V. Raman (who was knighted in 1929) was the Nobel laureate in physics, honoured for his work on the scattering of light and the discovery of the effect named after him. In his Nobel lecture, given on 11 th December 1930, Sir C.V. Raman said “The frequency differences determined from the spectra, the width and character of the lines appearing in them, and the intensity and state of polarization of the scattered radiations enable us to obtain an insight into the ultimate structure of the scattering substance. […] It follows that the new field of spectroscopy has practically unrestricted scope in the study of problems related to the structure of matter” In 1948, he founded the Raman Research Institute in Bangalore, India, with funds from private sources.
Crystal chemistry of kimzeyite from Anguillara, Mts. Sabatini, Italy
K-feldspar-bearing coesite pseudomorphs in an eclogite from Lanshantou (Eastern China)
Sb-rich rutile in the manganese concentrations at St. Marcel-Praborna, Aosta Valley, Italy; petrology and crystal-chemistry
Nomenclature of amphiboles; Report of the Subcommittee on Amphiboles of the International Mineralogical Association, Commission on New Minerals and Mineral Names
Nomenclature of amphiboles; report of the subcommittee on amphiboles of the International Mineralogical Association, Commission on New Minerals and Mineral Names
Sb-rich titanite in the manganese concentrations at St. Marcel-Praborna, Aosta Valley, Italy; petrography and crystal-chemistry
Microdiamond in high-grade metamorphic rocks of the Western Gneiss region, Norway
The crystal structure of preiswerkite
The crystal-chemistry of high-aluminium titanites
Late Quaternary Sea-Level Changes in Maine
Abstract: On the Maine coast, evidence of local relative sea level 12.5 ka is now exposed 60-80 m above present sea level. At that time, eustatic sea level was at least 70 m below present in most parts of the world. The difference is due to isostatic depression of the Maine coast by the weight of glacial ice. During deglaciation, the sea advanced inland in contact with the retreating margin of the marine-based ice sheet. Due to isostatic rebound and the contours of the land, the ice sheet grounded as much as 150 km inland of the present coast, glaciomarine deltas formed, and the transgression reached a stillstand at what is termed the upper marine limit. Due to differential tilting during rebound, this marine limit is now over 132 m in elevation at its farthest inlet extent. As rebound became dominant, sea level reached to 65 m below present at about 9.5 ka. At that time rebound slowed to about the same rate as that of eustatic sea-level rise. Shorelines were cut and deltas were formed at this lower marine stillstand position. Subsequently, eustatic rise became the predominant mode. Radiocarbon dates on fossil marine mollusks provide timing for this onlap and offlap. From 7.0 ka to the present, radiocarbon dates on wood and salt marsh peats provide a relatively precise sea-level curve. During the period 4.2--1.5 ka, sea level rose at 1.22 m/1,000 yrs. Before that period, it may have risen more than twice as fast. After 1.5 ka, it slowed to half the mid-late Holocene rate. Recent tide-gauge records show an acceleration in rate to 2--3 mm/yr for the past 40 yrs. Releveling, tide gauges, and other evidence (Anderson and others, 1984) suggest that the coast is being warped downward to the east, possibly due to non-glacially induced neotectonics.