DIGITAL DATABASE FOR THE MINNEAPOLIS QUADRANGLE (NL-15), UNITED STATES,
OF THE QUATERNARY GEOLOGIC MAP OF THE UNITED STATES (MISCELLANEOUS
INVESTIGATIONS SERIES I-1420

Files available through this site represent the digital component of the
      Minneapolis Quadrangle of the Quaternary Geologic Atlas of the U.S., 
	Miscellaneous Investigations Series, Map I-1420 (NL-15).  The files
	contain .e00 files, shapefiles, and pdf files of the map's illustrations
	and correlation diagram, and pdf files of the map unit descriptions and
	sources of information.  An ARC/INFO aml, keyfiles and shadeset
      are included to produce the plot of the data.  


The following ARC/INFO export coverages are included in minnGIS.zip:

	>geo_net--map unit polygons and open water; lines that are geologic
		    contacts and shorelines.
          
	>gla_lin--a line coverage of linear glacial features

	>gla_pnt--a point coverage of	glacial point data

	>hydr_lin--a line coverage indicating locations of streams and water bodies

	>topo_lin--a line coverage containing contour lines

	>bnd_lin--a line coverage with a neatline and state boundary lines

	>bnd_net--a polygon coverage containing county and administrative areas

	>rd_lin--a line coverage of state and federal highways in the U.S.

	>rr_lin--a line coverage of railroads

	>grid_lin--a line coverage of 1 degree projection lines


Included in minnIMG.zip: 

	I-1420_nl-15_map.pdf--A scan of the original published paper map

	I-1420_nl-15_plotfile.pdf--A plot of the digital files
            containing map units, glacial features, hydrology,
            topography, state boundaries, and list of map symbols

	minn.txt--an ASCII file of FGDC formal metadata

	I-1420_nl-15_correlation.pdf--A scan of the diagram showing
            correlation of map units

	I-1420_nl-15_glacialphases.pdf--A scan of the chart showing
            the relative ages and glacial phases in the Des Moines,
		Red River, Wadena, Rainy, and Superior lobes

	>I-1420_nl-15_lobes.pdf--A scan of the illustration showing the
		tentative relationships of the late Wisconsin glacial lobes,
		sublobes, and phases in the Minneapolis quadrangle

	>I-1420_nl-15_loess.pdf--A scan of the illustration showing
		loess thickness and distribution

	I-1420_nl-15_index.pdf--An index map showing location of
      	Quaternary Geologic Atlas of the U.S. quadrangles

	I-1420_nl-15_responsibility.pdf--A scan of the illustration of
            compilation responsibilities shown on the paper map

	I-1420_nl-15_textonly.pdf--Text description of map units, figure
	      captions, and sources of information used in preparing the
            original map

Also available in the file chesAV.zip are the ArcView shape files of the
            Arc/Info coverages

  Charles A. Bush
  U.S. Geological Survey                                                     
  (303) 236-4723
  cbush@usgs.gov