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.
What does 'Large Cap - Big Cap' mean. Large cap (sometimes big cap) refers to a company with a market capitalization value of more than $5 billion. Market capitalization is calculated by multiplying the number of a company's shares outstanding by its stock price per share.