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Explosive eruptions are often associated with these volcanoes. No examples of stratovolcanoes resembling Mount Fuji are found in Canada. ... The kimberlite pipes found in the Northwest Territories and in Alberta may soon make Canada one of the world's major producers of gem-quality diamonds.
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gsc.nrcan.gc.ca/volcanoes/type_e.php
gsc.nrcan.gc.ca/volcanoes/type_e.php
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As pipes are part of a maar–diatreme volcano and contain to a very large extent ..... In these bedded rocks carbonate is often the most common matrix .... The effect of alteration on the textures found in kimberlites is poorly ...
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linkinghub.elsevier.com/retrieve/pii/S0377027307004337
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(The word littoral means beach, which gives a clue to there these volcanoes are often found.) They are composed of basalt tephra that accumulates as ejected debris from the explosive interaction of moving lava and seawater.
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www.rockcollector.co.uk/volcano1.htm
www.rockcollector.co.uk/volcano1.htm
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often hard to see minerals unaided ... Some common rock forming minerals found in igneous rocks ... Often found as volcanoes from subduction zones...
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depts.clackamas.edu/science/physci/geology/g101/lecture...
depts.clackamas.edu/science/physci/geology/g101/lectures/igneous%20rx.htm
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A group name for framework alumosilicates with exchangeable cations. ... Green Mountain kimberlite ... Other minerals often found associated with zeolites include: Andradite, Apophyllite, Calcite, Cavansite, Prehnite, Epidote, Quartz, Pyrite, clay minerals etc.
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www.mindat.org/min-4395.html
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There is no mining for precious stones in Venezuela, notwithstanding the fact that precious stones are found. In the mountain chain of Perija, which is an outrunner of the Cordilleras, emeralds, topaz, and garnets are often found, but no one has taken any interest in the industry.
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jewelry.quickfound.net/where_gems_are_found_1904.html
jewelry.quickfound.net/where_gems_are_found_1904.html
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But peridot is often pronounced incorrectly so that it rhymes with dot. Peridot is the birthstone of August and is usually a very affordable colored gemstone. Unfortunately it is often compared to the rich dark green of emerald and in this comparison it is often found lacking.
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www.galleries.com/minerals/silicate/olivine/olivine.htm
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often for billions of years; kimberlite volcanoes tap the diamonds from these depths and carry them to the surface of the volcanic explosion. ... Nearly vertical, cylindrical body or opening in rock. Near surface the kimberlite pipes are found in clusters, at depth they coalesce and link up with dykes.
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www.new-millennium.com.au/glossary.php
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Crystallization temperatures (T) and oxygen fugacities (fO2) of kimberlite magma are estimated from oxides included in olivine phenocrysts from the Leslie, ... All oxide inclusions are located within the rims of olivine phenocrysts and can often be found in the same olivine grain (Fig. 3f). The oxides do not show...
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petrology.oxfordjournals.org/cgi/content/full/45/9/1725
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