A science homwork question. could you please explain it simply? Thank you so much!
Hi there I really do not understand this question...a quartz is not a rock, it is a mineral. Now, if you were talking of an intrusive or extrusive mineral, then that would be a different story. If you dig deeper into geology, you will see that minerals like quartz are commonly mistaken for rocks due to their intrusive organizations when they grow. Therefore, if you must answer, it would be intrusive. However, I believe this question to be a trick one - neither would be the correct answer. Go to google books and check a geology textbook - maybe that will help :) good luck!
Quartz isn't a rock, its a mineral. Given a choice between describing quartz as intrusive or extrusive, I would go with the former, as it as it tends to form in veins and cavities underground, rather than on the surface.
Quartz is a mineral, not a rock. It can be either intrusive or extrusive. The size of quartz crystals in extrusive rock (such as cooled magma, or lava at the surface of the earth) tend to be very small. The size of quartz crystals in intrusive rock (like granite) tend to be larger. If I had to pick an answer, I would say intrusive, but that's not a very good answer.
Quartz is the most common mineral found on the surface of the Earth. A significant component of many igneous, metamorphic and sedimentary rocks
Quartz is a mineral. It is a major component of felsic to intermediate igneous rocks, including both intrusive and extrusive types, and is very common in granite and rhyolite. Quartz is also very common as veins associated with some igneous rocks, and particularly with deformed metamorphic terranes. Quartz is also very common in sedimentary and metamorphic rocks. Many sandstones and conglomerates are composed to some degree of quartz grains, and metamorphic rocks such as quartzite are almost wholly quartz. And many beaches throughout the world are composed of quartz sand. So quartz is not an intrusive or extrusive rock - but it does occur as a major component of both, plus in many other forms in rocks and sediments.
