parallel hole drilling
81explosive — explosively, adv. explosiveness, n. /ik sploh siv/, adj. 1. tending or serving to explode: an explosive temper; Nitroglycerin is an explosive substance. 2. pertaining to or of the nature of an explosion: explosive violence. 3. likely to lead to… …
82Diamond — This article is about the mineral. For the gemstone, see Diamond (gemstone). For other uses, including the shape ◊, see Diamond (disambiguation) …
83Grande Prairie, Alberta — Infobox Settlement nickname = Swan City official name = City of Grande Prairie image caption = 100 Street, looking south from 100 Avenue flag size = flag caption = image logo caption = image dot dot mapsize = 200px dot map caption = Location of… …
84Costa Rican Jade Tradition — Jadeite is presumed one of the most precious materials of [Pre Columbian] Costa Rica. It, along with other similar looking greenstones ( ex. chalcedony, serpentine, and green jasper) were cherished and worked upon for years. It was used to… …
85Costa Rican jade tradition — Jadeite is presumed one of the most precious materials of Pre Columbian Costa Rica. It, along with other similar looking greenstones ( ex. chalcedony, serpentine, and green jasper) were cherished and worked for years. Jadeite was used to decorate …
86Reflection seismology — (or seismic reflection) is a method of exploration geophysics that uses the principles of seismology to estimate the properties of the Earth s subsurface from reflected seismic waves. The method requires a controlled seismic source of energy,… …
87Reuleaux triangle — A Reuleaux polygon is a curve of constant width that is, a curve in which all diameters are the same length. The best known version is the Reuleaux triangle. Both are named after Franz Reuleaux, a 19th century German engineer who did pioneering… …
88bridge — bridge1 bridgeable, adj. bridgeless, adj. bridgelike, adj. /brij/, n., v., bridged, bridging, adj. n. 1. a structure spanning and providing passage over a river, chasm, road, or the like. 2. a connecting, transitional, or intermediate route or… …
89volcano — /vol kay noh/, n., pl. volcanoes, volcanos. 1. a vent in the earth s crust through which lava, steam, ashes, etc., are expelled, either continuously or at irregular intervals. 2. a mountain or hill, usually having a cuplike crater at the summit,… …
90Greenland Ice Sheet Project — The Greenland Ice Sheet Project (GISP) was a decade long project to drill ice cores in Greenland that involved scientists and funding agencies from Denmark, Switzerland and the United States. Besides the U.S. National Science Foundation, funding… …
