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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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West Africa
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Ghana
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Bosumtwi Crater (2)
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Altiplano (1)
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Australasia
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Canada
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Western Canada
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Caribbean region
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Oligocene
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upper Tertiary (1)
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Mesozoic
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Cretaceous
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igneous rocks
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opal
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opal-A (2)
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alpha quartz (2)
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tridymite (32)
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sodalite (1)
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analcime (2)
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hyalite (1)
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orthosilicates
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kyanite (2)
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mullite (6)
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olivine group
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sillimanite (1)
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zircon group
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zircon (1)
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ring silicates
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cordierite (3)
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sheet silicates
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chlorite group
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clay minerals
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sulfosalts
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Primary terms
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absolute age (1)
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Africa
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Ghana
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Asia
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Far East
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China (1)
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Japan
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Middle East
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Sakhalin Russian Federation
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Atlantic Ocean
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Mid-Atlantic Ridge (1)
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Faeroe-Shetland Basin (1)
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Viking Graben (1)
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Northeast Atlantic (1)
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-
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Australasia
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Canada
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Nunavut
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Queen Elizabeth Islands
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Western Canada
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Manitoba
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carbon
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C-13/C-12 (1)
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Caribbean region
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West Indies
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Antilles
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Soufriere (1)
-
-
-
-
-
Cenozoic
-
Quaternary
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Pleistocene
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Bishop Tuff (1)
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upper Quaternary (1)
-
-
Tertiary
-
Muddy Creek Formation (1)
-
Neogene
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Miocene
-
upper Miocene (1)
-
-
Pliocene (2)
-
-
Paleogene
-
Eocene
-
upper Eocene
-
Twiggs Clay (1)
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-
-
Oligocene
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Fontainebleau Sandstone (1)
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upper Tertiary (1)
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ceramic materials (3)
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chemical analysis (1)
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Fennoscandian Shield (1)
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Murmansk Russian Federation
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-
-
Southern Europe
-
Bulgaria
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Bulgarian Rhodope Mountains (1)
-
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Greece
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Greek Aegean Islands
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Cyclades
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Thera (1)
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-
-
-
Iberian Peninsula
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Portugal (1)
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Italy (1)
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Transcaucasia (1)
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syenites
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albitite (1)
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-
-
volcanic rocks
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andesites (1)
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basalts
-
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glasses
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obsidian (2)
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pyroclastics
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-
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rhyolites (3)
-
-
-
inclusions
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fluid inclusions (2)
-
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Indian Ocean
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-
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isotopes
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O-18/O-16 (3)
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magmas (1)
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mantle (1)
-
Mediterranean region
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Cyclades
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Thera (1)
-
-
-
-
-
Mediterranean Sea
-
West Mediterranean
-
Tyrrhenian Sea (1)
-
-
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous
-
Cenomanian (2)
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Senonian (1)
-
Turonian (2)
-
-
-
-
metal ores
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lithium ores (1)
-
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metals
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alkali metals
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potassium (1)
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sodium (1)
-
-
aluminum (1)
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copper (1)
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iron
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-
ferrous iron (1)
-
-
manganese (1)
-
nickel (2)
-
vanadium (2)
-
-
metamorphic rocks
-
eclogite (1)
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fulgurite (1)
-
impactites
-
impact breccia
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suevite (3)
-
-
-
metasedimentary rocks (1)
-
-
metamorphism (7)
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metasomatism (6)
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meteorites
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iron meteorites (1)
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stony meteorites
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achondrites
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lunar meteorites (1)
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Martian meteorites
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shergottite
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Shergotty Meteorite (2)
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Zagami Meteorite (1)
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-
-
chondrites
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ordinary chondrites
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L chondrites (1)
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Mexico
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mineral deposits, genesis (1)
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Moon (3)
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ocean floors (1)
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O-18/O-16 (3)
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Pacific Ocean
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North Pacific
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Gulf of California (1)
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Northwest Pacific
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Okhotsk Sea (1)
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West Pacific
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Northwest Pacific
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paleoecology (1)
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paragenesis (1)
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petrology (4)
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phase equilibria (15)
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Plantae
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Coccolithophoraceae (1)
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Navicula (1)
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pollution (2)
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sedimentary petrology (5)
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clastic rocks
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cristobalite
Significance of tridymite distribution during cooling and vapor-phase alteration of ignimbrites
Spodumene from rare-metal pegmatites of the Kolmozero lithium world-class deposit on the Fennoscandian shield: trace elements and crystal-rich fluid inclusions
Volcanic SiO 2 -cristobalite: A natural product of chemical vapor deposition
Microthermometric behavior of crystal-rich inclusions in spodumene under confining pressure
Precipitates of α-cristobalite and silicate glass in UHP clinopyroxene from a Bohemian Massif eclogite
Abstract The hydrological budget of the three major Asian rivers, namely the Indus, the Ganga and the Brahmaputra, is controlled by the Indian monsoon and Westerlies but their contribution in these basins are highly variable. Widely varying average annual precipitation has been reported within these basins. A poor network of in situ rain gauges, particularly in mountainous regions, inaccessible terrain, high variations in altitude and the significantly large size of basins forces adaption of satellite-based average annual precipitation. We investigate precipitation patterns for these three basins by using satellite-based Tropical Rainfall Measuring Mission (TRMM-3B42) data and compare and validate it with Asian Precipitation Highly Resolved Data Integration Towards Evaluation (APHRODITE) and India Meteorological Department (IMD) interpolated gridded precipitation data. The entire basins as well as basinal areas within the geographic limits of India have been considered. Our study shows that the precipitation broadly follows an east–west and north–south gradient control. The easternmost Brahmaputra Basin has the highest amount of precipitation followed by the Ganga Basin, and the westernmost Indus Basin has the least precipitation; precipitation is highest on the higher elevations than compared to lower elevations of the basins. A seasonal- and elevation-based approach is adapted to estimate snow precipitation and is discussed in terms of overall precipitation.
Secondary minerals associated with Lassen fumaroles and hot springs: Implications for martian hydrothermal deposits
Thin-section petrography and SR-µXRD for the identification of micro-crystallites in the brown decorations of ceramic lead glazes
Mineral substitution: Separating the effects of fluids, minerals, and microstructure on P- and S-wave velocities
MODIFIED MINERAL PHASES DURING CLAY CERAMIC FIRING
Silica polymorphs in lunar granite: Implications for granite petrogenesis on the Moon
Discovery of stishovite in Apollo 15299 sample
Crystal structures and stabilities of cristobalite-helium phases at high pressures
HEAT TRANSPORT PROPERTIES OF CRISTOBALITE AND DISCUSSION OF “SNOWFLAKE” FORMATION
Occurrence of silica polymorphs nanocrystals in tuffaceous rocks, Province of the Mesa Central, Mexico, and their formation from subcritical Si-rich fluids
Characterization and genesis of horizontal banding in Brazilian agate: an X-ray diffraction, thermogravimetric and electron microprobe study
Pressure-induced structural transformations in the low-cristobalite form of AlPO 4
Browneite, MnS, a new sphalerite-group mineral from the Zakłodzie meteorite
Monoclinic tridymite in clast-rich impact melt rock from the Chesapeake Bay impact structure
A petrographic and geochemical comparison of suevites from the LB-07A and LB-08A cores recovered during 2004 by the International Continental Scientific Drilling Program with suevites from outside of the crater rim of the Bosumtwi impact structure indicates contrasting mechanisms of formation for these respective impact breccias. The within-crater suevites form only a small part of the lithic impact breccia–dominated impactite crater fill, in contrast to the impactites from outside of the crater, which consist solely of suevite. The clasts of suevites from within the crater display relatively low levels of shock (for most material <45 GPa). The numbers of shocked quartz grains, as well as fragments of diaplectic glass of quartz and feldspar in suevites decrease with depth through the LB-07A core (maximum three sets of planar deformation features [PDFs]). In contrast, the out-of-crater suevites sampled north and south of the crater contain up to four PDF sets in quartz clasts, ballen cristobalite, and higher proportions of diaplectic glass than the within-crater suevites. In addition, the suevites from outside of the crater contain significantly more melt particles (18–37 vol%) than the within-crater suevites (<5 vol%). Melt fragment sizes in suevites from outside the crater are much larger than those from suevites within the crater (maximum 40 cm versus 1 cm). The currently known distribution of impactites outside of the crater would be consistent with a low-angle impact from the east. We propose that the within-crater suevites and polymict lithic breccias were emplaced either via slumping off the crater walls or lateral movement of some melted and much displaced target rock within the crater. Limited admixture of fallback material from the ejecta plume is evident in the uppermost impactite deposit encountered in core LB-05B. In contrast, the out-of-crater suevites formed by fallout from a laterally differentiated ejecta plume, which resulted in different clast populations to the north and south of the crater.