DIGITAL DATABASE FOR THE CHESAPEAKE BAY QUADRANGLE NJ-18, 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
      Chesapeake Bay Quadrangle of the Quaternary Geologic Atlas of the U.S., 
	Miscellaneous Investigations Series, Map I-1420 (NJ-18).  The files
	contain .e00 files, shapefiles, and pdf files of the map's illustrations
	and correlation diagram, and a pdf file 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 chesGIS.zip:

	>geo_net--map unit polygons and open water; lines that are geologic
		    contacts and shorelines.
          
	>geo_lin--a line coverage indicating the lines of marine scarp

	>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.A.

	>rr_lin--a line coverage of railroads

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


Included in chesIMG.zip: 

	I-1420_nj-18_map.pdf--A scan of the original published paper map

	I-1420_nj-18_plotfile.pdf--A plot of the digital files
            containing map units, linear scarps, hydrology,
            topography, State boundaries, and list of map symbols

	ches.met--an ASCII file of FGDC formal metadata

	I-1420_nj-18_correlationdiag.pdf--A scan of the diagram showing
            correlation of map units

	I-1420_nj-18_correlationchart.pdf--A scan of the chart showing
            correlation of stratigraphic units

	I-1420_nj-18_index.pdf--An index map showing location of
      	Quaternary Geologic Atlas of the U.S. quadrangles

	I-1420_nj-18_responsibility.pdf--A scan of the illustration of
            compilation responsibilities shown on the paper map

	I-1420_nj-18_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