GEOLOGICAL SURVEY OF IRAN | WWW.GSI.IR
 
فارسی  |     
Home |  Contact Us |  Help 
    Member Login
Username
Password
 

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Result search of : W
Title Description
 Washbox Air Cycle   The valve-timing cycle determining the periods of air admission and exhaust. 
 Warping   The slight flexing or bending of the Earth’s crust on a broad or regional scale, either upward (upwarping) or downward (downwarping); the formation of a warp.  
 Wash Pipe   The pipe that ejects the jet of water through the bit, used in wash boring.  
 Wave Diffraction   The cooperative scattering of any electromagnetic radiation where it
encounters an obstacle, esp. the edge of an obstacle, resulting in
constructive and destructive interference. Also, a single event resulting
from constructive interference. 
 White Sand   Sand that is usually quartzitic and pure enough to resist heat and slags; used for the final layer in Siemen’s steel furnaces. 
 Wacken   Rocklike clay, formed by the decomposition of basalts in situ 
 Wash Gold   placer gold 
 White Mica   Muscovite 
 Wet Gold-silver Ore   Lead ore with high silver content. During smelting, the lead trickles through the mass and collects gold and/or silver, which are later recovered.  
 Wave Front   In seismology, the surface of equal time elapse from the source point to the position of the resulting outgoing signal at any given time after the source charge has been activated. In a more restricted sense, the surface along which phase is constant at a given instant.  
1 2 3 4 5
Related links