1 Aphanitic igneous rocks have a fine-grained texture and most of their crystals are too small to see with the naked eye. 2  You will need to use a magnifying glass to observe the crystals in aphanitic rocks. 3  Igneous rocks that form too quickly for crystals to form have what is called a glassy texture. An example of an intrusive rock is granite. 2  When magma is above the earth's crust, it is known as lava. 3  Extrusive rocks form through very fast cooling of lava above the Earth's surface. 4  Extrusive rocks have very small, almost microscopic crystals.
Market capitalization (or market cap) is a fairly common financial phrase. You may have seen stocks or mutual funds described as small-cap, mid-cap or large-cap on financial news websites. Or you may have read newspaper headlines referring to the market cap of a particular company, industry or region.
sensitive market. Definition. A market position that can easily be changed from one direction to another direction based on news. News that was reported during the previous session may influence the next session and cause stocks to advance or decline. During volatile sessions in a sensitive market, stocks are typically impacted by every piece of news whether good or bad.