0-9 a b c d e f g h i j k l m n o p q r s t u v w y z search

TeachMeFinance.com - explain Rhyolite　 Rhyolite　 The term 'Rhyolite　' as it applies to the area of volcanos can be defined as 'Volcanic rock (or lava) that characteristically is light in color, contains 69 percent silica or more, and is rich in potassium and sodium. 　　 Rhyolite is a light-colored rock with silica (SiO2) content greater than about 68 weight percent. Sodium and potassium oxides both can reach about 5 weight percent. Common mineral types include quartz, feldspar and biotite and are often found in a glassy matrix. Rhyolite is erupted at temperatures of 700 to 850° C. (USGS/VHP)'. Previous 5 Terms: rhomboid rhombus rhonchial RHS Rhyolite Next 5 Terms: rhythmometer RIA Ribbon Lightning Ribbon silicon Ribose About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.