نتایج جستجو برای: extrusive rock
تعداد نتایج: 39038 فیلتر نتایج به سال:
Abstract The Quaternary Tarosero volcano is situated in the East African Rift of northern Tanzania and mainly consists trachyte lavas some trachytic tuffs. In addition, there are minor occurrences extrusive basalts, andesites latites, as well peralkaline trachytes, olivine trachytes phonolites. Some phonolites contain interstitial eudialyte, making one few known for agpaitic rocks. This study i...
1 A Case Study on Data Quality, Privacy, and Evaluating the Outcome of Entity Resolution Processes Pei Wang, University of Arkansas at Little Rock, Little Rock, AR, USA Daniel Pullen, University of Arkansas at Little Rock, Little Rock, AR, USA Fan Liu, University of Arkansas at Little Rock, Little Rock, AR, USA William C. Decker, University of Arkansas at Little Rock, Little Rock, AR, USA Ningn...
Abstract Mosonik, a 3.25 Ma extensively dissected stratovolcano located in the North Tanzanian Divergence of East African Rift, consists predominantly phonolite and three types phonolitic nephelinite distinguished by presence or absence amphibole garnet antecrysts differing populations complexly zoned antecrystal phenocrystal pyroxenes. The antecryst–phenocryst assemblage is typical hybrid lava...
The composition of the intrusive gabbroic lower oceanic crust remains poorly characterized in comparison to extrusive portion crust, especially for intermediate-fast spreading mid-ocean ridges. This is a consequence limited exposures extant or ophiolites similar ridge crust. One best analogues southern Samail ophiolite that formed during period rapid seafloor above nascent subduction zone. Here...
The upper continental crust is formed from chemically diverse granitic plutons. Active debate surrounds the range of physical conditions (P-T-X- f O 2 ) and differentiation processes which occur in mush bodies that solidify to form Transition metal stable isotopes are increasingly employed trace magmatic both extrusive lavas intrusive plutonic suites, with a focus on analysis whole rock powders...
We recently identified a novel human protein kinase, p160 ROCK, as a putative downstream target of the small GTPase Rho. Using the human ROCK cDNA as a probe, we isolated cDNA of two distinct, highly related sequences from mouse libraries. One encoded a mouse counterpart of human ROCK (ROCK-I), and the other encoded a novel ROCK-related kinase (ROCK-II). Like ROCK/ROCK-I, ROCK-II also bound to ...
For the last three decades, the position of the Triassic–Jurassic boundary (TJB) in nonmarine strata has largely been based on its palynostratigraphic placement just below the oldest basalts of the Central Atlantic magmatic province (CAMP) in the Newark Supergroup of eastern North America. This boundary, however, is demonstrably older than the TJB as it is defined in marine strata. Thus, the pa...
Drilling into a rock massif is energetically extremely consumptive process. Hence the optimization of drilling regime with objective of energy consumption minimization, is very important. Proposed article discusses partial problem of this problem. During the drilling process it is useful to know the drilled rock type, whereas to particular drilled rock needs convenient drilling regime, which is...
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