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basalt
alkali basalt
alkali basalt A fine-grained, dark-coloured, volcanic rock characterized by
phenocrysts of
olivine, titanium-rich
augite,
plagioclase feldspar and iron oxides. For similar SiO
2 concentrations, alkali basalts have a higher content of Na
2O and K
2O than other
basalt types such as
tholeiites. They are also characterized by the development of
modal nepheline in their
groundmass (only seen with the highest powered lens on a petrological microscope) and normative nepheline (Ne) in their
CIPW norms. Alkali basalts are typically found on updomed and rifted
continental crust, and on oceanic islands such as Hawaii and Ascension Island.
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Use of basalt in asphalt concrete mixes.
Magazine article from: Construction and Building Materials; 1/1/2009; ; 700+ words
; ...rutting. Keywords: Basalt; Asphalt concrete mixes...deformation 1. Introduction Basalts are dark colored, fine...mineral grains of the basalt are so fine that they...there are some intrusive basalts, having cooled inside the Earth's interior. Basalt is low in silica content...
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Hightec Announces Details Of Las Vegas Basalt Fiber Manufacturing Plant.
News Wire article from: Canadian Corporate News; 2/1/2002; 700+ words
; ...HTEH), announced today that it's wholly owned subsidiary, Basalt Fiber Industries, Inc. has been formed to commercialize the development of basalt fiber products in America. Basalt Fiber Industries, Inc. will serve as a sister subsidiary...
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Structure and stratigraphy of the early Tertiary basalts of the Blosseville Kyst, east Greenland
Magazine article from: Journal of the Geological Society; 5/1/1997; ; 700+ words
; ...by widespread plateau basalts, locally with an angular...unconformity of 8 deg. The basalt stratigraphy established...region. The plateau basalts were erupted over a zone...largest coherent remnant of basalts preserved onshore (Fig...This East Greenland basalt plateau is more than...
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Crustal contribution to the genesis of Ethiopian plateau rhyolitic ignimbrites: Basalt and rhyolite geochemical provinciality
Magazine article from: Journal of the Geological Society; 1/1/2003; ; 700+ words
; ...high-TiO^sub 2^ basalts (e.g. Garland...This coincidence of basalt and rhyolite provinciality...are related to the basalts either by extensive...crystallization of the exposed basalt magma types and varying...TiO^sub 2^ flood basalts. As noted for other continental flood basalt ...
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BASALT TOWN COUNCIL ISSUES AGENDA FOR JAN. 23 MEETING
News Wire article from: US Fed News Service, Including US State News; 1/23/2007; 612 words
; The Basalt Town Council issued the agenda for their meeting: 5:45 P...ITEMS 6:13 4. Request for Transfer of 3.2 Liquor License: Basalt Center, LLC (formerly the Basalt Store), 136 Emma Road, Basalt Motion to Approve Staff Recommendation...
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[sup.40]Ar/[sup.39]Ar age of the Jurassic North Mountain Basalt, southwestern Nova Scotia.
Magazine article from: Atlantic Geology; 3/1/2003; ; 700+ words
; ...for the North Mountain Basalt, which are similar to...ages for correlative basalts of eastern North America...is a zeolite-bearing basalt from the middle flow...Ma for dyke rocks and basalt flows within parts of...and similar ages for basalts and dyke rocks of the...
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Ateliers of basalt. Basalt industries of Tafuna (AS-31-150) and Pava'ia'i (AS-31-170), Tutuila Island, American Samoa.(Research Reports)
Magazine article from: Archaeology in Oceania; 4/1/2007; ; 700+ words
; ...dimensional. Keywords: basalt adze, industry, technological...Adzes made from the fine basalt of Tutuila were widely...export-quality Tutuila basalts (Figure 2). Following...Archaeologically, basalts geochemically similar...unfinished adzes. However, basalt flakes--likely to...
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Emeishan Basalts (SW China) and the 'end-Guadalupian' crisis magnetobiostratigraphic constraints
Magazine article from: Journal of the Geological Society; 1/1/2002; ; 700+ words
; ...half of the Emeishan Basalt outcrop belt was erupted...data, the main Emei Basalts appear to be at least...however, that the Emei Basalt waning zone sequence...thickness of the main basalt pile (respectively, 175 m and 270 m). The basalts conformably overlie a...
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BASALT TOWN COUNCIL ISSUES AGENDA FOR NOV. 28 MEETING
News Wire article from: US Fed News Service, Including US State News; 11/28/2006; 700+ words
; The Basalt Town Council issued the agenda for their...Ordinance of the Town Council of the Town of Basalt, Colorado, Granting Approval of a Minor...the Costs of Government for the Town of Basalt, Colorado, for the 2007 Budget Year Council...
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 "Syrian Arab News Agency (SANA)")
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Basalt Stone ,C*A Raw Material for Important Qualitative Industries in Syria.
News Wire article from: Syrian Arab News Agency (SANA); 11/10/2009; 543 words
; Damascus,(SANA)-Basalt stone is used in many of the modern...materials demanded by the global markets. Basalt fiber industry is different from that...radial energy doesn't penetrate through basalt smelters and its products, said Engineer...
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basalt
Book article from: The Columbia Encyclopedia, Sixth Edition
...Mohole, Project ). Basalt contains a high percentage...and magnesium. Some basalts are porphyritic, i...pyroxene . Where molten basalt cools rapidly, as at...and great pressures, basalt is transformed into various...respects to terrestrial basalts. Fine-grained basaltic...
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Basalt
Book article from: World of Earth Science
Basalt Basalt is a mafic volcanic rock consisting primarily of plagioclase feldspar and...minerals can include other pyroxenes, olivine , quartz , and nepheline. Basalt is the volcanic equivalent of the plutonic rock gabbro, and as such has...
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within-plate basalt
Book article from: A Dictionary of Earth Sciences
within-plate basalt (WPB) Basalts which are generated within...western USA) and ocean island basalts are types of within plate basalts. Although each has its own...from the mid-ocean-ridge basalt (MORB), low-potassium...
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continental flood basalts
Book article from: The Oxford Companion to the Earth
continental flood basalts Continental flood basalts ( CFBs ) are the largest volumes of basalts that are found on the continents, having volumes of thousands of cubic kilometres; some flows, such as those of the Deccan in India and the Columbia...
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mid-ocean-ridge basalt
Book article from: A Dictionary of Earth Sciences
...MORB) A type of tholeiitic basalt (see THOLEIITE ), erupted...rare-earth element in the basalt is divided by its mean concentration...comparison), this type of basalt shows a progressive lowering...region in the mantle, these basalts, often termed low-potassium...
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