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Sep 26, 2006· Granite. Granite is one of the most common rocks on our planet. It is an igneous rock that was formed from hot, melted rock called magma. The hot, liquid rock is called magma while it remains underground and is called lava when it comes out of the earth''s crust during a volcanic eruption. The hot magma cools underground and hardens into solid rock.
Jan 12, 2013· Is basalt harder than granite? – Yahoo! Answers. May 06, 2007 · Both basalt and granite are types of rock, and a rock is composed of multiple minerals . So the hardness of a rock is determined by the minerals, . »More detailed
Nov 06, 2010· if the volcano is explosive, you could find large boulders thrown hundreds of feet from the actual eruption. then there could be a large "river"of ash, melted rock, gasses call pyroclastic. in all volcanos the rocks will cary from fine crystlised and glassy tp pophoritic large crystals. smaller cristal rocks cool faster than larger crystal rocks so it is suggested that larger crystals were ...
Sep 30, 2009· Basalt is mafic and being a mafic rock means it has more Iron and Magnesium components than felsic rocks (like granite.) Felsic rocks on the other hand have higher silicate compositions. Now examining the atomic mass of the component elements isn''t the only thing that goes into the density of a mineral or a rock, but it''s an assumption one can ...
Dec 07, 2011· So, Obsidian, with no visible crystals and a glassy texture must have cooled quickly, and a Granite with feldspar phenocrysts that measure ~3cm long must have cooled very slowly. Source(s.
Feb 07, 2011· The metamorphic stuff is much harder to spot than say the hexagonal basalt on the north west coast of Ireland, that''s because it has been changed by vulcanic heat from whatever it was when it was a depositional rock. And that''s why your question is a spoton good query; these things need a lot of experience.
Dec 09, 2010· For crush strength Basalt, Diabase, Dolerite, Gabro and Quartzite all rate very high. They are even harder than Granite Gneiss and Marble. Source(s): Table page 35: Practical Handbook of Rock Mass Classification Systems and Modes of Ground Failure (): Andy Afrouz:
Mar 14, 2010· granite, basalt and andesite? if all these three rocks occurs in the same area of the earth''s surface, what is the most likely tectonic location in which this suite of related rocks originally formed and also please describe to me how the original magma from which those rocks crystallised was formed and how the rocks were related
Feb 16, 2006· the two are volcanic rocks (this makes granite an igneous rock, no longer a sedimentary.). Granite has a tendency to be in continental crust, while basalt has a tendency to be found on islands and the seafloor. the two forms of rocks even have crystals, yet they are extra good to locate in basalt.
Yahoo Answers. Mar 15, 2011 Basalt, Granite, Obsidian, and Pumice? Best Answer: Granite is not a volcanic rock, for starters. It has a coarse, visiblycrystalline texture because it cools much more slowly in a socalled plutonic environment, beneath the surface. Therefore there is time for crystals to grow. Basalt the volcanic rock is ...
Jan 28, 2008· For the best answers, search on this site https:///awhuz. Diorite cannot have any more than 5% quartz while granite must contain (about) 25 to 60% quartz. Also, diorite contains mostly plagioclase feldspars (oligoclase to andesine in composition), with little to no potassium feldspar.
Nov 13, 2009· The Granite Railway, America''s first railroad, was built to haul granite from the quarries in Quincy, Massachusetts, to the Neponset River in the 1820s. With increasing amounts of acid rain in parts of the world, granite has begun to supplant marble as a .
Jun 07, 2008· Granite is formed high deep in the earth''s with extremely high temperatures, and is a very much hard, resistant stone made of crystallized minerals. Marble is less durable than Granite. Granite is generally Scratch resistant, but Marble is not. United Granite
Apr 09, 2009· Basalt plagioclase, olivine, pyroxene, magnetite, augite. Pumice is volcanic glass of rhyolitic composition and does not contain any minerals. Granite feldspar, quartz, hornblende, mica. Open up your petrology book, these answers should be easy to find. Learning is not a spectator sport.
Sep 12, 2012· Because of the above granite will be found on the continental crust (mostly at least). The crust consists of lighter minerals than deeper parts of the earth, and that is why the minerals you will find in granite will be lighter, less dense and richer in SiO2 than those found in basalt (granite is therefore a much more felsic rock).
Mar 02, 2018· Depends on the cementation of the sand grains in the sandstone. A quartzite, a highly silicified and wellcemented sandstone would be harder and more durable than a feldsparrich granite. As a general rule, though, an igneous rock will tend to be better welded together than a sedimentary rock and thus "harder" in the sense of more durable.
Moh''s Hardness Scale: How Hard Is Flemington . Granite crystals are listed between 79 on Mohs'' Scale of Hardness, while other minerals that may be included, such as mica, may show as a 5. The veining and marbling of granite also adds to the hardness of the countertop. Research is Necessary. Because one s of granite may have a higher rating ...
is basalt harder than granite? | Yahoo Answers May 6, 2007, Best Answer: Both basalt and granite are types of rock, and a rock is composed, On Moh''s hardness . How hard is granite .
Jan 02, 2008· At first sight this unique and enigmatic site appears smaller than imagined, but the tallest upright stone is (22ft) high, with another (8ft) below ground. The outermost element of the site is the Avenue that runs straight down a gentle slope for 530m (560yds) into Stonehenge Bottom.
Apr 22, 2012· They are both rich in hard minerals . somebody else mentioned marble. Marble is neither hard nor an igneous rock. It is a metamorphic rock comprised largely of calcium carbonate (calcite) there is a metamorphic rock that is harder than granite, and that is quartzite, which is comprised almost entirely of interlocking quartz crystals
Jan 29, 2008· Vesicle is a frozen air bubble, simple as that. The term ''basic'' is an old geology term, it does not mean ''simple'' or ''common'' to geologists. Basic refers to what we would now call a mafic igneous rock, an igneous rock with high amounts of mafic or darf minerals, rich in Fe and Mg.
Feb 06, 2006· GRANITE: Granite is an igneous rock which is formed by slowly cooling pockets of magma trapped beneath the earth''s surface. Granite is used for monuments and for trim and decoration on buildings and in homes. SCORIA: Scoria is an igneous rock which was formed when lava cooled quickly above ground. You can see where the pockets of air had been.
Nov 21, 2009· No, I would assume granite to be harder than basalt. Granitic magma cools inside the earth (intrusive), so its crystals are larger and more pronounced. Basalt cools rapidly and is extrusive, so it has smaller crystals. Additionally, granite has more silica than basalt, and silica is a hard .
Oct 24, 2017· The physical appearance of granite is very different from that of has a variety of speckled colors resulting from the melded stones Marble is typically a solid grayishwhite or cream color and has dark veins running through is a stronger and harder stone than marble is, which lends it a shiny, glossy appearance compared to marble''s dull smoothnessAs both granite and ...
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