WorldWide Drilling Resource

engagements f 90% of his busin tion, and motiva customer service sales, manageme in 25 countries o given over 4000 Speaking Profe Tim Connor, CS rom previous ess is repeat tional topics. communica- nt, leadership, n a variety of presentations ssional) has P (Certified Ti S k 4 @ 704-875 new client “G Call him and a clients. il -1230 uarantee”. sk about his TimConn m pea s u or.com gma .com 46 NOVEMBER 2017 WorldWide Drilling Resource ® Frequently-Used Geological Terms Part 66 Glossary Adapted from the Dictionary of Geological Terms P Pinacoid - An open crystal form consisting of two parallel faces. Pinnacle - A tall, slender pillar of rock, or a lofty peak. Also refers to a spire or col- umn of rock or coral either submerged or awash. Pisolite - A sedimentary rock, commonly a limestone made up chiefly of cemented pisoliths. Placer - A surficial mineral deposit formed by mechanical concentration of mineral particles from weathered debris. The common types are beach placers and alluvial placers. The mineral concentrated is usually a heavy mineral such as gold, cassi- terite, or rutile. Placer Mining - The extraction and concentration of heavy metals or minerals from placer deposits by various methods, generally using moving water. Plane of Symmetry - A plane dividing a crystal into halves, one of which is the mir- ror image of the other. The plane which bisects an organism or its shell symmetrically. Planetology - The study of the condensed matter of the solar system, including planets, satellites, aster- oids, meteorites, and interplanetary material. The term is frequently used as a synonym of astrogeology. Planimeter - An instrument for measuring the area of any plane figure by passing a tracer around the perimeter. Pluton - An igneous intrusion. Also refers to a body of rock formed by metasomatic replacement. The term originally signified only deep-seated or plutonic bodies of granitoid texture. Look for more terms next month!