The rate of cooling is proportional to the difference in temperature between the bodies in contact with heat flowing from the warmer body to the cooler body. Start studying igneous rocks. 16. Compositions range from rocks rich in the framework silicates quartz and potasium feldspar, to those rich in minerals containing magnesium and iron (olivines and pyroxines). Diorite is plutonic and andesite is volcanic. — One forms from cooling magma, and one forms from cooling lava. • Cooling Rate: rapid, extrusive • Intrusive Equivalent: diorite or gabbro • Other Characteristics: vesicular, but denser and darker with larger vesicles Explanation: Hope it helps. Crystals in magma grow in a similar way as the melt cools. Diorite produced coarse grain sizes from slow cooling. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The same magma on Andesite and Diorite rapidly crystallizes on the Earth's surface and forms Andesite. — One is extrusive and one is intrusive. The higher the rate of cooling the smaller the size of the crystals. — They cooled at different rates. Tectonic Environment: Divergent Boundary or Intra-oceanic hot spots What are the top 10 accidents in the world? The video below is a clip of crystals forming in solution. As magma cools, it begins to crystallise and form solid rock. The differences between Andesite and Diorite are in their grain size and their cooling rate. What is the origin and rate of formation of this rock? Intrusive Equivalent: diorite or gabbro. Cooling rate and gas content create other textures (see Figure below for examples of different textures). Rate of cooling depends on where magma cools. Lavas that cool extremely rapidly may have a glassy texture. (1) plutonic with slow cooling (2) plutonic with rapid cooling (3) volcanic with slow cooling (4) volcanic with rapid cooling . Igneous rocks that solidify within the crust are called "intrusive rocks" or "plutonic rocks" (named for Pluto, the Roman God of the Underworld). Other Characteristics: vesicular like pumice, but denser and darker with larger vesicles. melting point of lotionpleasee help 1. Phaneritic: coarse grain, individual crystals are visible - slow cooling. In the simplest terms, … Cooling Rate: rapid, extrusive. Which rock is sedimentary in origin and formed as a result of chemical processes? Which type of muscle is voluntary the substance that will disolves what are male reproductive system? GABBRO BASALT DIORITE ANDESITE (PORPHYRY) GRANITE RHYOLITE PUMICE OBS ID AN Cooling History/Texture Slow Cooling and Coarse Grained Fast Cooling and Fine Grained Very Fast Cooling and Glassy/Cellular Mafic and Dark Color Felsic Mineral Composition: Predominantly Glass. Igneous rocks are classified on two axies: Composition and cooling rate. 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