WorldWide Drilling Resource

65 WorldWide Drilling Resource ® FEBRUARY 2014 Frequently-Used Geological Terms Part 27 Glossary Adapted from the Dictionary of Geological Terms H - Continued Hydrometer - An instrument for deter- mining the specific gravity of a liquid, and hence its strength. Hydrophone - A pressure-sensitive detector which responds to sound trans- mitted through water. Hydrosphere - The waters of the earth, as distinguished from the rocks (lithos- phere), living things (biosphere), and air (atmosphere). Hydrothermal - Of or pertaining to hot water; the action of hot water; or the products of this action. It is generally used to describe any hot water, but has been restricted by some to water of magmatic origin. Hydrous - Describes a mineral com- pound containing water. Hygrometer - An instrument for meas- uring humidity of the air. Hygroscopic - Having the property of readily absorbing moisture from the atmosphere. Hyperpycnal Inflow - Flowing water which is denser than the body of water it enters, resulting in the formation of a turbidity current. Hypersaline - Excessive saline; hav- ing a salinity substantially greater than normal seawater. Hypogene - Formed, crystallized, or lying at depths below the earth’s sur- face. Hypolimnion - The lowest layer of water in a lake characterized by an essentially uniform temperature. Hypopycnal Inflow - Flowing water which is less dense than the body of water it enters, e.g. a river entering the ocean. Hypothermal - Of, relating to, or being mineral deposits formed at great depths and high temperatures. I Ice Age - The latest of the glacial epochs, also known as the Pleistocene Epoch. Ice Cap - A dome-shaped or platelike cover of perennial ice and snow cover- ing the summit area of a mountain mass so no peaks emerge through it; or cov- Groundwater Expo 2013 Dealmakers Rich (L) and Darren (R-behind) with SIMCO ® Drilling Equipment, Inc. of Osceola, Iowa, congratulate the AAA Well Drilling team on their new rig headed to Lexington, South Carol ina. SIMCO ® Drilling Equipment, Inc. Son Philip and father Philip Layman of B.W. Layman & Sons of White Lake, Michigan, with Jim LaPorte of Mudslayer Mfg. of Sequim, Washington. Mudslayer Manufacturing The Department of Public Works, County of Los Angeles, California, purchased this rig from Gus Pech Mfg. Co., Inc. of Le Mars, Iowa. Gus Pech Mfg. Co., Inc. This VERSA-DRILL ® rig from Laibe Corporation of Indianapolis, Indiana, is on its way to Hanson Well Drilling & Repair of Nassau, New York. Laibe Corporation Northwest Flattanks of Choteau, Montana, was pleased to dis- play this water truck whose new owner is RichesonWell Service/ Gothenburg Irrigation based in Gothenburg, Nebraska. Northwest Flattanks Wayne (C) and Matt (R) with Acker Drill Company of Scranton, Pennsylvania, stand with Pat from L.R. Kimball of Ebensburg, Pennsylvania. Acker Drill Company These photos by WWWWDDRR . Send your deals to: promotions@ worldwidedrillingresource.com ering a flat landmass such as an Arctic island; spreading outward in all direc- tions due to its own weight. Ice Sheet - A glacier of considerable thickness covering a large area form- ing a continuous cover of ice and snow over a land surface and not confined by the underlying topography. Ice Shelf - A thick mass of ice perma- nently attached to the land but project- ing into and floating on the sea. More terms to come next month!