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BEDDING vertical direction

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					Federal Geographic Data Committee                                                                     FGDC Document Number FGDC-STD-013-2006
FGDC Digital Cartographic Standard for Geologic Map Symbolization                                                                 Appendix A
                                                                             6—BEDDING
REF NO                         DESCRIPTION                                    SYMBOL       CARTOGRAPHIC SPECIFICATIONS*                        NOTES ON USAGE*
                                                                                           all lineweights .2 mm                               Inclined (upright) and
  6.1    Horizontal bedding                                                                                                                    overturned bedding
                                                                                                       circle diameter 2.5 mm                  symbols are used when
                                                                                                                          HI-6                 the top direction of beds
                                                                                40                                 40                          is known to a reason-
  6.2    Inclined bedding—Showing strike and dip                                                   1.0 mm
                                                                                                                   5.0         all lineweights able degree of certainty.
                                                                                                                  mm                 .2 mm
                                                                                                                                               On maps where deter-
                                                                                                                                               mination of top direction
  6.3    Vertical bedding—Showing strike                                                           2.0 mm
                                                                                                                                               is "known" at some pla-
                                                                                                                                               ces and "unknown" at
                                                                                65                                 65
                                                                                                                         HI-6                  others, such symbols al-
  6.4    Overturned bedding—Showing strike and dip                                                  1.0 mm                                     so may be used to indi-
                                                                                                                           .625 mm radius      cate where top direction
                                                                                                                                               is "unknown" (compare
         Bedding overturned more than 180 degrees—                              20                                 20
  6.5                                                                                                 .7 mm                 .375 mm radius with ref. nos. 6.13-24).
          Showing strike and dip                                                                                                               Symbols may be used
                                                                                                                                               without a dip value to
         Inclined (dip direction to right) bedding, for multiple                     40                          5.5 40 HI-6
                                                                                                                mm                             indicate the generalized
  6.6     observations at one locality—Showing strike and
                                                                                                                                               strike and direction of
          dip                                                                                         1.0 mm            1.325 mm
                                                                                                                                               dip of beds.
         Inclined (dip direction to left) bedding, for multiple                      40                                40                      For symbols represent-
  6.7     observations at one locality—Showing strike and                                                                                      ing a single observation
          dip                                                                                                                                  at one locality, point of
                                                                                                                                               observation is the mid-
         Vertical bedding, for multiple observations at one                                                                                    point of the strike line.
  6.8
          locality—Showing strike
                                                                                                      2.0 mm                                   For multiple observa-
         Overturned (dip direction to right) bedding, for mul-                                                                                 tions at one locality, join
                                                                                     65         .625 mm radius         65
  6.9     tiple observations at one locality—Showing strike                                                                   HI-6             symbols at the "tail"
          and dip                                                                                     1.0 mm
                                                                                                                                               ends of the strike lines
                                                                                                                                               (opposite the ornamen-
         Overturned (dip direction to left) bedding, for mult-                       65                                65                      tation); the junction
 6.10     iple observations at one locality—Showing strike                                                                                     point is at point of
          and dip                                                                                                                              observation. To obey the
         Bedding overturned more than 180 degrees (dip                                                                        HI-6             right-hand rule, use the
                                                                                     20                                20
 6.11     direction to right), for multiple observations at one                                                                                "dip direction to right"
          locality—Showing strike and dip                                                               .7 mm                .375 mm radius symbols (use "dip direc-
         Bedding overturned more than 180 degrees (dip                                                                                         tion to left" symbols only
                                                                                     20                                20
 6.12     direction to left), for multiple observations at one                                                                                 when necessary to pre-
          locality—Showing strike and dip                                                                                                      vent overcrowding).
         Inclined bedding, where top direction of beds is                                                                HI-6           Symbols that have a
                                                                                30                                 30
 6.13     known from local features—Showing strike and                                               1.0 mm                             ball may be used to
                                                                                          all lineweights      5.0              dot diameter
          dip                                                                                   .2 mm         mm                  .75 mmindicate a greater level
         Vertical bedding, where top direction of beds is                                                                               of certainty in the deter-
 6.14     known from local features—Showing strike. Ball                                          2.0 mm
                                                                                                                                        mination of top direc-
          shows top direction                                                                                                           tion.
                                                                                                                                        On maps where deter-
         Overturned bedding, where top direction of beds is                     85                             85
                                                                                                                     HI-6
                                                                                                                                        mination of top direction
 6.15     known from local features—Showing strike and                                           1.0 mm
                                                                                                                       .625 mm radius   is "known" at some pla-
          dip                                                                                                                           ces and "unknown" at
         Bedding overturned more than 180 degrees, where                        10                             10    HI-6               others, symbols that
                                                                                                    .7 mm                .375 mm radius
 6.16     top direction of beds is known from local features                                                                            have a ball also may be
          —Showing strike and dip                                                                                                       used to indicate where
         Inclined (dip direction to right) bedding, where top direc-                                         5.5 30 HI-6                top direction is "known"
                                                                                     30                     mm
 6.17      tion of beds is known from local features, for multiple                                                                      (compare with ref. nos.
           observations at one locality—Showing strike and dip                                                      1.325 mm
                                                                                                                                        6.1-12).
                                                                                                     1.0 mm
                                                                                                                                        For symbols represent-
         Inclined (dip direction to left) bedding, where top direc-                  30                            30                   ing a single observation
 6.18      tion of beds is known from local features, for multiple
                                                                                                                                        at one locality, point of
           observations at one locality—Showing strike and dip
                                                                                                                                        observation is the mid-
         Vertical (top direction to right) bedding, where top direction of                                                              point of the strike line.
 6.19     beds is known from local features, for multiple observations                                                                  For multiple observa-
          at one locality—Showing strike. Ball shows top direction                                   2.0 mm                             tions at one locality, join
         Vertical (top direction to left) bedding, where top direction of                                                               symbols at the "tail"
 6.20     beds is known from local features, for multiple observations                                                                  ends of the strike lines
          at one locality—Showing strike. Ball shows top direction                                                                      (opposite the ornamen-
         Overturned (dip direction to right) bedding, where top                                                                         tation); the junction
                                                                                     85        .625 mm radius      85                   point is at point of
 6.21     direction of beds is known from local features, for mult-                                                       HI-6
          iple observations at one locality—Showing strike and dip                                                                      observation. To obey the
                                                                                                     1.0 mm        1.7 mm
                                                                                                                                        right-hand rule, use the
         Overturned (dip direction to left) bedding, where top                       85                            85                   "dip direction to right"
 6.22     direction of beds is known from local features, for mult-                                                                     symbols (use "dip direc-
          iple observations at one locality—Showing strike and dip                                                                      tion to left" symbols only
         Bedding overturned more than 180 degrees (dip                                                                    HI-6          when necessary to pre-
 6.23     direction to right), where top direction of beds is                        10                            10                   vent overcrowding).
          known from local features, for multiple observa-                                                                   .375 mm radius
          tions at one locality—Showing strike and dip                                                .7 mm              1.325 mm
         Bedding overturned more than 180 degrees (dip                               10                                 10
 6.24     direction to left), where top direction of beds is
          known from local features, for multiple observa-
          tions at one locality—Showing strike and dip
                                                                                          *For more information, see general guidelines on pages A-i to A-v.

                                                                                A–6–1
Federal Geographic Data Committee                                                                 FGDC Document Number FGDC-STD-013-2006
FGDC Digital Cartographic Standard for Geologic Map Symbolization                                                             Appendix A
                                                                    6—BEDDING (continued)
REF NO                        DESCRIPTION                                 SYMBOL      CARTOGRAPHIC SPECIFICATIONS*                           NOTES ON USAGE*
                                                                                                                      HI-6                  Symbols may be used
         Inclined crenulated, warped, undulatory, or contort-               25                                  25
 6.25                                                                                            1.0 mm                 .375 mm             without a dip value to
          ed bedding—Showing approximate strike and dip                               all lineweights           5.0
                                                                                            .2 mm               mm     .75 mm radius        indicate the generalized
         Vertical or near-vertical crenulated, warped, undu-                                                                                strike and direction of
 6.26     latory, or contorted bedding—Showing approxi-                                      2.1875 mm
                                                                                                                                            dip of beds.
          mate strike                                                                                           5.0
                                                                                                                mm
                                                                                     all lineweights                  HI-6
                                                                            25             .2 mm                25
 6.27    Inclined graded bedding—Showing strike and dip                                                                  dash length
                                                                                              1.0 mm                      .875 mm;
                                                                                                .5 mm                   spacing .5 mm

         Vertical or near-vertical graded bedding—Showing
 6.28                                                                                         2.25 mm
          strike
                                                                                                                      HI-6
         Overturned graded bedding—Showing strike and                       70                                  70
 6.29                                                                                          1.0 mm
          dip
                                                                                                                       .625 mm radius
                                                                                                                      HI-6        all
         Inclined bedding in crossbedded rocks—Showing                      35                                  35           lineweights
 6.30                                                                                        1.0 mm                             .2 mm
          approximate strike and dip                                                                            5.0
                                                                                              .5 mm             mm       .625 mm radius

         Vertical or near-vertical bedding in crossbedded
 6.31                                                                                         2.25 mm
          rocks—Showing approximate strike

                                                                            75                                  75    HI-6
         Overturned bedding in crossbedded rocks—                                              1.0 mm
 6.32
          Showing approximate strike and dip
                                                                                                                       .625 mm radius
                                                                                                    HI-6                 2.0 mm           Use when the measure-
         Approximate orientation of inclined bedding—                       15                                  15
 6.33                                                                                          1.0 mm                 .7 mm               ment of strike and (or)
          Showing approximate strike and dip                                                                    5.0       all lineweights
                                                                                                                mm              .2 mm     dip value is approximate
                                                                                                                                          but the location of ob-
         Approximate orientation of vertical or near-vertical                                                                             servation is accurate.
 6.34                                                                                          2.0 mm                     .7 mm
          bedding—Showing approximate strike                                                                                              Symbols that have a
                                                                                                                                          ball may be used to
                                                                            85                                  85  HI-6
         Approximate orientation of overturned bedding—                                          .7 mm                                    indicate a greater level
 6.35
          Showing approximate strike and dip                                                                                              of certainty in the deter-
                                                                                                                      .625 mm radius
                                                                                                                                          mination of top direc-
         Approximate orientation of inclined bedding, where                                         HI-6            2.0 mm
                                                                            25                                  25                        tion.
 6.36     top direction of beds is known from local features                                   1.0 mm                .7 mm
                                                                                      dot diameter              5.0       all lineweights On maps where deter-
          —Showing approximate strike and dip                                           .75 mm                  mm              .2 mm     mination of top direction
         Approximate orientation of vertical or near-vertical bedding,                                                                    is "known" at some pla-
 6.37     where top direction of beds is known from local features                             2.0 mm                     .7 mm           ces and "unknown" at
          —Showing approximate strike. Ball shows top direction                                                                           others, symbols that
         Approximate orientation of overturned bedding,                                             HI-6            2.0 mm                have a ball also may be
                                                                            75                                  75                        used to indicate where
 6.38     where top direction of beds is known from local                                      1.0 mm                .7 mm
          features—Showing approximate strike and dip                                                                                     top direction is "known."
                                                                                                                       .625 mm radius

         Horizontal bedding, as determined remotely or from                                   .75 mm                                        Usually reserved for use
 6.39
          aerial photographs                                                                                              all lineweights
                                                                                                                                            in reconnaissance geo-
                                                                                                                  2.0 mm        .2 mm       logic mapping.
         Gently inclined (between 0° and 30°) bedding, as                                    1.375 mm        .4375 mm
                                                                                                                      1.0
 6.40     determined remotely or from aerial photographs—                                                             mm
                                                                                                              5.0
          Showing approximate strike and direction of dip                                                     mm
         Moderately inclined (between 30° and 60°) bedding,                                                 .5 mm
 6.41     as determined remotely or from aerial photographs
          —Showing approximate strike and direction of dip
         Steeply inclined (between 60° and 90°) bedding, as                                             .5 mm
 6.42     determined remotely or from aerial photographs—
          Showing approximate strike and direction of dip
         Vertical or near-vertical bedding, as determined
 6.43     remotely or from aerial photographs—Showing                                                                  2.0 mm
          approximate strike
         Gently overturned (between 0° and 30°) bedding, as
 6.44     determined remotely or from aerial photographs—
          Showing approximate strike and direction of dip                                                              .625 mm radius
         Moderately overturned (between 30° and 60°) bedding,                                               .5 mm
 6.45     as determined remotely or from aerial photographs
          —Showing approximate strike and direction of dip
         Steeply overturned (between 60° and 90°) bedding,                                              .5 mm
 6.46     as determined remotely or from aerial photographs
          —Showing approximate strike and direction of dip
                                                                                     *For more information, see general guidelines on pages A-i to A-v.




                                                                            A–6–2

				
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