Maps showing geology, structure, and geophysics of the central Black Hills, 
South Dakota

By Jack A. Redden and Ed DeWitt


This geologic spatial database has been approved for release and publication by 
the Director of the USGS.  Although this database has been subjected to rigorous 
review and is substantially complete, the USGS reserves the right to revise the 
data pursuant to further analysis and review.  Furthermore, it is released on 
condition that neither the USGS nor the United States Government may be held 
liable for any damages resulting from its authorized or unauthorized use.


The database can be downloaded via the Web from http://pubs.usgs.gov/sim/2777/.  
ArcInfo export files and ArcView shapefiles may be extracted from a 
gzip-compressed tar file (2777.tar.gz) or zip-compressed file (2777.zip).  In 
addition, Adobe Portable Document Format (PDF) files can be downloaded for the 
map sheets and the pamphlet, from which paper copies may be printed.


This spatial database consists of ArcInfo export files and ArcView shapefiles 
contained in a gzipped tar archive or zip archive.  Both compressed archive 
files contain both types of spatial database files.  See the list below.  Please 
refer to the file 2777.met for detailed metadata documentation for this spatial 
database.  These spatial data sets contain the geologic and structural data for 
the central Black Hills.  The data are supplied in Arc/Info .e00 interchange and 
ArcGIS shapefile formats.


List of files:
  2777_sheet1.pdf
  2777_sheet2.pdf
  2777_pamphlet_508.pdf
  2777.met

2777_base.tar.gz or 2777_base.zip:
  bh_hydro_n.tif (drainages of Rapid City 30’ x 60’ quadrangle)
  bh_hydro_n.tfw
  bh_hydro_s.tif (drainages of Mount Rushmore 30’ x 60’ quadrangle)
  bh_hydro_s.tfw
  bh_topo.tif
  bh_topo.tfw
  bh_dem.tif

2777.tar.gz or 2777.zip:

  00README.TXT
  2777.met

  2777_covers (This subdirectory contains ArcInfo geospatial databases as 
    coverages, a workstation auto load.aml, and three ArcMAP .mxd and.lyr files)

    blk_pnt.e00:  minor folds, domes, solution domes, top of beds, breccia 
      pipes, teepee buttes
    blk_pnt_nopC.e00:  non preCambrian bedding and foliation
    blk_pnt_pC.e00:  preCambrian bedding and foliation
    blk_sym.e00:  line decoration and all point features
    blk_line1.e00:  linear map units
    blk_line2.e00:  faults, folds, cross section lines, domes
    blk_poly1.e00:  map units, water, mine tailings
    blk_poly2.e00:  metamorphic isograds
    form_line.e00:  foliation lines for blk_poly2 polygons
    load.aml:  arc workstation autoload aml

    blk_geology.mxd:  cover-based ArcMAP of Black Hills geology
    blk_geol_shp.mxd:  shape file ArcMAP of geology excluding point data
    blk_isograd.mxd:  cover-based ArcMAP of Black Hills metamorphic grades

    blk_poly1 arc.lyr:  ArcMap line colors for contacts and shorelines
    blk_poly1 polygon_nopC.lyr:  ArcMAP poly colors for non-preCambrian rocks
    blk_poly1 polygon_pC.lyr:  ArcMAP poly colors for preCambrian rocks
    blk_line1 arc.lyr:  ArcMap line colors for dikes
    blk_line2 arc.lyr:  ArcMap line colors for folds and faults
    blk_poly2 arc.lyr:  ArcMap line colors for isograds


  2777_shapes (This subdirectory contains ArcView shapefiles)

    blk_pnt_point.shp
    blk_pnt_nopC_point.shp
    blk_pnt_pC_point.shp
    blk_sym_point.shp
    blk_line1_tic.shp
    blk_line1_arc.shp
    blk_line2_arc.shp
    blk_poly1_arc.shp
    blk_poly1_polygon.shp
    blk_poly1_label.shp
    blk_poly2_arc.shp
    blk_poly2_polygon.shp
    blk_poly2_annotation_str.shp
    form_line_arc.shp


All data are projected into UTM zone 13, NAD27.