Hot stones are used by people in Australia for a long time because these stones can be used for massage therapy and it will help in increasing metabolism in your body. The basalt stone is an igneous rock volcanic dark colored composition rich in silicates of magnesium and iron and silica – which constitutes one of the most abundant rocks in the Earth’s crust. The basalts usually have a porphyritic texture, with phenocrysts of olivine, augite, plagioclase, and a finely crystalline matrix. Basalt is the most common volcanic rock and surpasses any other igneous rock in terms of surface coverage of the Earth, even together: forms most of the ocean floor. There are also large extensions of basalt present which called traps on the continents. Oceanic islands and continental and insular volcanic arcs are the other places where basalt stones can be found.
Uses of Basalt Stones:
Basalt Stones are Used in Different Areas. for Example:
- Throughout history, basalt stones have been used as building material for various cultures, including the Olmecs of Mexico, Ancient Egypt, and the Rapanui people, to name a few. Nowadays, artificial basalt fibers are used to reinforce concrete structures.
- Despite being impermeable, its use is not advisable for certain hydraulic works due to its excessive fracturing. Another issue is that basalt surfaces tend to form small white spots where the mineral has been altered, possibly as a result of solar radiation.
- Basalt stone has a coefficient of thermal expansion lower than granite, limestone, sandstone, quartzite, marble, or slate, so it receives little damage in fires. Given the low albedo of the basalts, the surfaces of this rock tend to heat up more than others, as a result of solar radiation, reaching temperatures of almost 80 ° C in the Sahara. Massive basalt (without vesicles) has a density of 2.8 to 2.9 g /cm³ being denser than granite and marble but less than gabbro. On the Mohs hardness scale, it has been estimated that basalt has a hardness that can vary from approximately 4.8 to 6.5.
History of Basalt Stones:
- During the decades around the year 1800, a scientific controversy arose around the origin of basalt. Disciples and followers of the German geologist Abraham Gottlob Werner argued that basalt was a sedimentary rock that had its origin in precipitation in a great ancestral ocean. This theory is called “neptunism”. Two sides opposed this theory: the followers of James Hutton, later known as “Plutonists” who claimed that basalt was an intrusive rock, and the “vulcanists” who considered basalt volcanic rock. Some of the arguments of the Neptunists against the volcanic origin of basalt were their presence in places like the Causeway of the Giant and Saxony where there are no active volcanoes, in addition to presumed fossil finds in basalt.
- There is a dispute over whether the basalt in the magma state is primary (it would originate directly from the melting of rocks) or if it derives from another more mafic type of magma. In any case, there are several rocks that have the necessary elements so that, through their direct fusion or fusion and subsequent refinement, they produce basaltic magma. These are peridotite, pyroxenite, hornblendite, basalt itself and other rocks from metamorphosed basalts, such as amphibolite and eclogite. For a number of reasons, several of these rocks have been disqualified as a possible source of basaltic magma, with the thesis that peridotites give rise to basalts, but a minority of scientists is inclined to eclogites.
It can be concluded that Basalt stones are used in different areas and the use of it is being increased in different other aspects. for knowing more information about basalt stones, please visit here for further information.