There are literally dozens of good project management software applications out there, with Microsoft Project being one of the most popular mid-range project management packages, and the likes of Primavera being popular at the higher end. 1  IT leadership & CW500.  IT architecture.
Intrusive Igneous Rocks. Many kilometers below the Earthâs surface, molten rock called magma flows into cracks or underground chambers. There, the magma sits, cooling very slowly over thousands to millions of years. As it cools, elements combine to form common silicate minerals, the building blocks of igneous rocks. These mineral crystals can grow quite large if space allows. Rocks that form in this way are called intrusive igneous or plutonic rocks. The mineral crystals within them are large enough to see without a microscope. There are many different types of intrusive igneous rocks but granite is the most common type. Last modified June 17, 2003 by Lisa Gardiner.
When magma cools and hardens below the Earth's surface, an intrusive igneous rock forms. Because the process of the formation of intrusive igneous rock occurs slowly, these rocks tend to have a grainy texture.Examples of intrusive igneous rock include granite and gabbro.ocks are classified by the way they form. Igneous rocks are those that form when magma cools and hardens. This process can occur on the Earth's surface or underground. The exact location of the formation of the rock determines the type of igneous rock it is. Interesting Igneous Rocks Facts: