WorldWide Drilling Resource

Northern Plains Chapter of the ISEE President: Billy Obermire Tel: 307-689-0050 www.npcisee.org 29 WorldWide Drilling Resource ® OCTOBER 2014 Black Hills Chapter of the ISEE President: Doug Hoy www.npcisee.org Frequently-Used Geological Terms Part 34 Glossary Adapted from the Dictionary of Geological Terms K - Continued Kimberlite - An alkalic peridotite con- taining olivine. The name is derived from Kimberley, South Africa, where the rock contains diamonds. Kinetic Metamorphism - The defor- mation of rocks without chemical recon- stitution or recrystallization to form new minerals. Klintite - Biohermal limestone, particu- larly the massive core. Knob - A rounded hill or mountain, espe- cially an isolated one. Knob-and-Kettle Topography - A land surface with several kettle holes sepa- rated by round hills of glacial till. Knoll - A small, rounded hill. KREEP - Acronym for a basaltic lunar rock type first discovered in Apollo 12 breccas containing an unusually high amount of potassium (K) rare earth elements (REE), and phosphorus (P). Kyanite - A blue or light green triclinic mineral. It occurs in long-bladed crystals and crystalline aggregates in schists, gneisses, and granite pegmatites. It is used to manufacture refractories (heat- resistant materials). L Labile - Rocks and minerals which are easily decomposed. Labradorite -Afeldspar mineral of the pla- gioclase series which has equal amounts The Upsata Lake Waterfowl Production Area is located in the knob-and-kettle topography of the Blackfoot River watershed in Montana. Photo courtesy of fws.gov of sodium and calcium. It is common in igneous rocks with low silica content. Ladder Vein - Short, regularly spaced, roughly parallel fractures traversing dikes from wall to wall. Their width is restricted to the width of the dike, but may extend great distances along it. Lahar - A landslide or mudflow of pyro- clastic material on the flank of a volcano. Lamina - The thinnest recognizable layer in a sediment or sedimentary rock, differ- ing from other layers in either color, com- position, or particle size. Laminated Quartz - Vein quartz contain- ing slabs, blades, or laminar films of other material. Lamprophyre - Dark gray to black intru- sive igneous rocks generally occurring as dikes (tabular bodies inserted in fissures). These rocks are characterized by a porphyritic (fine-grained) texture in which large crystals of dark, iron-magnesium minerals are enclosed in a fine-grained to dense groundmass. More terms to come next month! ' , 2$(".)( 3 .. " ( 3 ). & ( 2$(".)( (. , )(! , ( $( &/ - - --$)(- 1$.# -* % ,- *, - (.$(" .)*$ - , & . .) && -* .- )! .# & -.$(" $( /-.,3 ( 1),%-#)*- )( $'*),. (. & -.$(" .)*$ - -/ # - & -. -$"( - $-')", *# /- ( /( ,",)/( & -.$(" (./ %3 & -. , ( ) . $( #$- #)/,- )! , +/$, ., $($(" $( -$("& 3 &/- ., -#)1 1$.# )0 , 2#$ $. )).#- ), '), $(!),' .$)( && ), 0$-$. )/, -$. %3 & -.$(" )(! , ( )' Win a prize! Send your completed puzzle to: WWDR PO Box 660 Bonifay, FL 32425 or fax to: 850-547-0329 Congratulat ions to: Conner Lor ick AAA Wel l Dr i l l ing A Lexi ngton,, SC Winner for September! Time for a Little Fun! September Puzzle Solution: Match the three-letter words on the right to complete the seven-letter “October” words on the left. ACRO_ _ _ IRE ANTH_ _ _ END CAUT_ _ _ ILL EYEB_ _ _ BAT PRET_ _ _ ION VAMP_ _ _ ALL