Geologic map of the Grand Junction quadrangle, Mesa County, Colorado

Online link https://geo-nsdi.er.usgs.gov/metadata/map-mf/2363/metadata.faq.html
Description This 1:24,000-scale geologic map of the Grand Junction 7.5' quadrangle, in support of the USGS Western Colorado I-70 Corridor Cooperative Geologic Mapping Project, provides new interpretations of the stratigraphy, structure, and geologic hazards in the ar
Originators Scott, Robert B.; Carrara, Paul E.; Hood, William C.; and Murray, Kyle E.

Related topics

States or counties

Overview of attributes

>---------------------------------------------------------------
>COVERAGE NAME: gj24k
>---------------------------------------------------------------
>
>USER-DEFINED ITEMS IN GJ24K.PAT:
>------------------------------------
>
>ATTRIBUTE NAME: UNIT
>DATABASE ITEM STRUCTURE: 4,4,I,0
>DESCRIPTION: unique numeric identifier for each geologic unit
>ITEM VALUES FOR 'UNIT':
>integer value in the range 1 - 38
>
>ATTRIBUTE NAME: LABEL
>DATABASE ITEM STRUCTURE: 10,10,C,0
>DESCRIPTION: geologic unit label
>ITEM VALUES FOR 'LABEL':
>(see table below)
>
>ATTRIBUTE NAME: DESC
>DATABASE ITEM STRUCTURE: 100,100,C,0
>DESCRIPTION: text description of geologic unit
>ITEM VALUES FOR 'DESC':
>(see table below)
>
>ATTRIBUTE NAME: SYMBOL
>DATABASE ITEM STRUCTURE: 3,3,I,0
>DESCRIPTION: shade symbol used to color geology polygons
>ITEM VALUES FOR 'SYMBOL':
>integer value in the range 12 - 930
>
>RELATIONSHIP OF ITEMS 'UNIT', 'LABEL', 'SYMBOL', and 'DESC':
>UNIT    LABEL   SYMBOL   DESC
>   1       af       20   Artificial fill
>  32      Jeb      330   Board beds unit of the Entrada Formation
>  33      Jes      591   Slickrock Member of the Entrada Formation
>  34       Jk      530   Kayenta Formation
>  28      Jmb      580   Brushy Basin Member of the Morrison Formation
>  38      Jmb      580   Bentonite quarry located in Jmb
>  29      Jms      693   Salt Wash Member of the Morrison Formation
>  30      Jmt      560   Tidwell Member of the Morrison Formation
>  31       Jw      890   Wanakah Formation
>  35      Jwg      785   Wingate Sandstone
>  27       Kb      880   Burro Canyon Formation
>  26       Kd      590   Dakota Formation
>  25       Km      480   Mancos Shale
>   4       Qa       60   Alluvium deposited by tributary streams
>  15      Qac      271   Alluvium and colluvium, undivided
>   2    Qalc1       40   Youngest alluvium deposited by the Colorado
>                          River
>  36    Qalc1       40   Gravel pit
>   5    Qalc2       80   Oldest alluvium deposited by the Colorado River
>   3     Qalg      375   Youngest alluvium deposited by the Gunnison
>                           River
>  17     Qaso      393   Old alluvial-slope deposit
>  23       Qc       30   Colluvium
>  14      Qfy       51   Young fan-alluvium and debris-flow deposits
>  18      Qlg      484   Local gravel deposits
>  19 Qlg/Qt30      284   Local gravel deposits over terrace alluvium 30
>                           of the Colorado River
>  24     Qlso      190   Older landslide deposits
>  22     Qlsy      899   Younger landslide deposits
>  16     Qpwf       12   Pediment deposit of Walker Field
>  20      Qse      151   Eolian sand and sheetwash deposits
>  21 Qse/Qt30      163   Eolian sand and sheetwash deposits over terrace
>                           alluvium 30 of the Colorado River
>  12    Qt100       42   Terrace alluvium 100 of the Colorado River
>  13    Qt170       74   Terrace alluvium 170 of the Colorado River
>   8     Qt30       70   Terrace alluvium 30 of the Colorado River
>   9    Qt60c       93   Terrace alluvium 60 of the Colorado River
>  10    Qt60g      194   Terrace alluvium 60 of the Gunnison River
>  11  Qtc/Qtg      647   Terrace alluvium of the Colorado River over
>                           terrace alluvium of the Gunnison River
>   7     Qtgu      696   Terrace alluvium of the Gunnison River,
>                           undivided
>   6      Qvf       33   Valley-fill deposits
>  37     river     930   river water
>
>USER-DEFINED ITEMS IN GJ24K.AAT:
>------------------------------------
>
>ATTRIBUTE NAME: LINECODE
>DATABASE ITEM STRUCTURE: 3,3,I,0
>DESCRIPTION: unique numeric identifier for linear feature type
>ITEM VALUES FOR 'LINECODE':
>integer value in the range 1 - 106
>
>ATTRIBUTE NAME: SYMBOL
>DATABASE ITEM STRUCTURE: 3,3,I,0
>DESCRIPTION: line symbol to be used to draw line entities
>ITEM VALUES FOR 'SYMBOL':
>integer value in the range 1 - 227
>
>ATTRIBUTE NAME: TYPE
>DATABASE ITEM STRUCTURE: 10,10,C,0
>DESCRIPTION: text description of line type
>ITEM VALUES FOR 'TYPE':
>boundary
>contact
>fault
>neatline
>
>ATTRIBUTE NAME: MODIFIER
>DATABASE ITEM STRUCTURE: 20,20,C,0
>DESCRIPTION: modifier, if any, for the 'type' item above
>ITEM VALUES FOR 'MODIFIER':
>approximate
>certain
>concealed
>scarp terrace
>
>ATTRIBUTE NAME: DESC
>DATABASE ITEM STRUCTURE: 100,100,C,0
>DESCRIPTION: text description of linear geologic feature
>ITEM VALUES FOR 'DESC':
>(see table below)
>
>RELATIONSHIP OF ITEMS 'LINECODE', 'SYMBOL', 'TYPE', 'MODIFIER', and 'DESC':
>LINECODE   SYMBOL   TYPE       MODIFIER        DESC
>1          1        contact    certain         contact, certain
>2          3        contact    approximate     contact, approximately
>                                                  located
>3          4        boundary   approximate     gravel quarry  boundary
>6          4        boundary   approximate     bentonite quarry boundary
>106        8        fault      approximate     normal fault,
>                                                  approximately located,
>                                                  queried to indicate end
>                                                  of recognizable feature
>102        51       fault      certain         normal fault, certain,
>                                                  with bar and ball on
>                                                  downthrown side
>4          172      contact    scarp terrace   contact coincident with
>                                                  scarp terrace, hachures
>                                                  on low side of scarp
>101        173      fault      certain         normal fault, certain
>103        175      fault      approximate     normal fault,
>                                                  approximately located
>104        176      fault      concealed       normal fault, concealed
>105        185      fault      approximate     normal fault,
>                                                  approximately located,
>                                                  with bar and ball on
>                                                  downthrown side
>5          227      neatline                   neatline to define limits
>                                                  of geologic map area
>
>---------------------------------------------------------------
>COVERAGE NAME: gjpnt
>---------------------------------------------------------------
>
>USER-DEFINED ITEMS IN GJPNT.PAT:
>------------------------------------
>
>ATTRIBUTE NAME: SYMBOL
>DATABASE ITEM STRUCTURE: 3,3,I,0
>DESCRIPTION: symbol used to draw point feature
>ITEM VALUES FOR 'SYMBOL':
>2
>63
>
>ATTRIBUTE NAME: STRIKE
>DATABASE ITEM STRUCTURE: 3,3,I,0
>DESCRIPTION: compass orientation of feature, in degrees
>ITEM VALUES FOR 'STRIKE':
>integer value in the range 0 - 360
>
>ATTRIBUTE NAME: DIP
>DATABASE ITEM STRUCTURE: 3,3,I,0
>DESCRIPTION: inclination from vertical of feature
>ITEM VALUES FOR 'DIP':
>integer value in the range 0 -90
>
>ATTRIBUTE NAME: DESC
>DATABASE ITEM STRUCTURE: 100,100,C,0
>DESCRIPTION: text description of feature
>ITEM VALUES FOR 'DESC':
>strike and dip of inclined bedding calculated from outcrop pattern using
>   3 point solution
>strike and dip of inclined bedding measured in the field
>
>---------------------------------------------------------------
>COVERAGE NAME: gjline
>---------------------------------------------------------------
>
>USER-DEFINED ITEMS IN GJLINE.AAT:
>------------------------------------
>
>ATTRIBUTE NAME: LINECODE
>DATABASE ITEM STRUCTURE: 3,3,I,0
>DESCRIPTION: unique numeric identifier for linear feature type
>ITEM VALUES FOR 'LINECODE':
>integer value in the range 107 - 120
>
>ATTRIBUTE NAME: SYMBOL
>DATABASE ITEM STRUCTURE: 3,3,I,0
>DESCRIPTION: line symbol to be used to draw line entities
>ITEM VALUES FOR 'SYMBOL':
>integer value in the range 7 - 176
>
>ATTRIBUTE NAME: TYPE
>DATABASE ITEM STRUCTURE: 10,10,C
>DESCRIPTION: text description of line type
>ITEM VALUES FOR 'TYPE':
>fold
>xsec_line
>
>ATTRIBUTE NAME: ACCURACY
>DATABASE ITEM STRUCTURE: 15,15,C
>DESCRIPTION: apparent accuracy of line type
>ITEM VALUES FOR 'ACCURACY':
>approximate
>certain
>concealed
>
>ATTRIBUTE NAME: CERTAINTY
>DATABASE ITEM STRUCTURE: 15,15,C
>DESCRIPTION: questionable or not questionable
>ITEM VALUES FOR 'CERTAINTY':
>queried
>
>ATTRIBUTE NAME: DESC
>DATABASE ITEM STRUCTURE: 100,100,C
>DESCRIPTION:
>ITEM VALUES FOR 'DESC':
>(see table below)
>
>RELATIONSHIP OF ITEMS 'LINECODE', 'SYMBOL', 'TYPE', 'ACCURACY', 'CERTAINTY', 'DESC'
>
>LINECODE   SYMBOL   TYPE        ACCURACY    CERTAINTY   DESC
>110        7        fold        concealed   queried     concealed axis of
>                                                           anticline,
>                                                           queried to
>                                                           indicate end of
>                                                           recognizable
>                                                           feature
>107        64       fold        certain                 axis of
>                                                           anticline,
>                                                           certain
>120        173      xsec_line                           cross-section
>                                                           location line
>                                                           A-A'
>108        175      fold        approximate             axis of
>                                                           anticline,
>                                                           approximately
>                                                           located
>109        176      fold        concealed               axis of
>                                                           anticline,
>                                                           concealed

http://pubs.usgs.gov/mf/2002/mf-2363/mf-2363_pam.pdf