6 ~ ~ DEPARTMENT OF THE INTERIOR UNITED STATES GEOLOGICAL SURVEY GEOLOGIC MAP OF THE TANKS PEAK QUADRANGLE, MOFFAT COUNTY, COLORADO By Wallace R. Hansen and Paul E. Carrara GEOLOGIC QUADRANGLE MAP Published by the U.S. Geological Survey, 1980 G 3!: >"'0 CJ 0 -I GEOLOGIC MAP SYMBOLS COMMONLY USED ON MAPS OF THE UNITED STATES GEOLOGICAL SURVEY (Special symbols are shown in explanation) Contact-Dashed where approximately Strike ,and dip of beds-Ball indicates located; short dashed where inferred; top 9f beds known from sedimentary dotted where concealed structures ..!!:.... Inclined e Horizontal Contact-Showing dip; well exposed at --+-Vertical Overturned triangle -:f. Strike and dip of foliation Fault-Dashed where approximately located; short dashed where inferred; !L Inclined -+-Vertical +Horizontal dotted where concealed Strike and dip of cleavage 1.20 _ ___..! __....,~, ___ Fault, showing dip-Ball and bar on ....!.1.., Inclined 1--i Vertical + Horizontal downthrown side Bearing and plunge of lineation ~r--...,........,..~r--...,.... __ Normal fault-Hachured on down­ '~Inclined • Vertical- Horizontal thrown side Strike and dip of joints Fault-Showing relative horizontal ~ Inclined -+-Vertical + Horizontal movement Note: Planar symbols (strike and dip • + + + + + Thrust fault-Sawteeth on upper plate of beds, foliation or schistosity, and cleav­ age) may be combined with linear symbols to record data observed at ~ Anticline-Showing direction of plunge; same locality by superimposed symbols dashed where approximately located; at point of observation. Coexisting dotted where concealed planar symbols are shown intersecting at point of observation. Asymmetric anticline-Short arrow indicates steeper limb Shafts Overturned anticline-Showing direction of dip of limbs ~ Vertical ~ Inclined Syncline-Showing direction of plunge; Adit, tunnel, or slope dashed where approximately located; >-Accessible >+--Inaccessible dotted where concealed X Prospect Asymmetric syncline-Short arrow indicates steeper limb Quarry 'X' Active ')('Abandoned Overturned syncline-Showing direction of dip of limbs Gravel pit X Active X Abandoned 4~f-----+----- Monocline-Showing direction of plunge of axis · Oil wells o Drilling Q Shut-in -<>- Dry hole, Minor anticline-Showing plunge of axis ~Gas ~Show of gaB abandoned Minor syncline-Showing plUnge of axis • Oil ~ Show of oil .