|Description||New 1:24,000-scale geologic mapping along the Interstate-70 urban corridor in western Colorado, in support of the State/ USGS Cooperative Geologic Mapping Project, is contributing to a more complete understanding of the stratigraphy, structure, tectonic e|
|Originators||Kellogg, Karl S.; Bryant, Bruce; and Redsteer, Margaret H.|
|Publication||U.S. Geological Survey Miscellaneous Field Studies Map MF-2375|
The complete geologic map database comprises four component ArcINFO coverages (jsp24k, jsppnt, jspcontrol, and jspcontour). The jsp24k coverage contains all contact lines and label points for each of the map polygons. The jsppnt coverage includes point data that represents bedding attitude and descriptive symbology for the jsp24k coverage fault lines. The jspcontrol coverage contains point data that represents elevation control points used by the geologist during field mapping. The jspcontour coverage contains elevations of the base of the Boone Formation. >DATABASE STRUCTURE - ARC/INFO ==================================== > >Jasper Geology Coverage (jsp24k) > >AAT > >The arc attribute table contains two user-defined items: > >Item name width output type >DESCRIPTION 25 25 c >LINECODE 5 5 n > >The item 'LINECODE' contains the number that corresponds to >a line symbol in ArcInfo lineset carto.lin > >contact = 1 >quad boundary = 1 >cross-section = 18 >exposed fault = 102 >inferred fault = 110 >concealed fault = 149 > >PAT > >The polygon attribute table contains four user-defined items: > >Item name width output type >GEOLOGY 10 10 C >COLOR 3 3 N >HATCH 10 10 I >SPECGEO 10 10 C > >The item 'geology' corresponds to the geologic code (ex: Qty, > Qto) >The item 'color' corresponds to the appropriate number in the > shadeset wpgcmykg.shd >The item 'hatch' is used to specify the hatch marks required > to plot Mbs units. The item 'hatch' has a value of 29 for Mbs > (corresponding to an appropriate hatch symbol in the shadeset > plotter.shd) and a value of zero for every other geologic unit. >The aml used to plot this map will shade the polygons using the > item 'color' and the shadeset wpgcmykg.shd; selected polygons will > be shaded a second time using the item 'hatch' and the > shadeset plotter.shd. >The item 'specgeo' is used to specify special geologic > characters associated with the age of the lithologic units > (ex: Pennsylvanian). These are plotted using font 027. > >Qty Younger terrace and alluvium deposits (Holocene and late Pleistocene) >Qto Older terrace and alluvium deposits (Quaternary) >Qc Colluvial deposits (Quaternary) >Pbu Upper part of Bloyd Formation (Pennsylvannian) >Pbl Lower part of Bloyd Formation (Pennsylvanian) >Phg Prarie Grove Member of Hale Formation (Pennsylvanian) >Phc Cane Hill Member of Hale Formation (Pennsylvanian) >Mp Pitkin Limestone (Mississippian) >Mf Main body of Fayetteville Shale (Mississippian) >Mfw Wedington Sandstone Member(Mississippian) >Mbv Batesville Sandstone(Mississippian) >Mb Main body of Boone Formation (Mississippian) >Mbs St. Joe Limestone Member (Mississippian) >Of Fernvale Limestone (Ordovician) >Oe Everton Formation (Ordovician) >Op Powell Dolomite (Ordovician) > >Jasper Strike-Dip Coverage (jsppnt) > >PAT > >The point attribute table contains 8 user defined items: > >Item name width output type >DIP 10 10 I >AZIMUTH 8 8 I >MARKER 10 10 I >DESCRIPTION 20 20 C >ARROWAZ 4 4 I >DIAMAZ 4 4 I >ARROWDIP 4 4 I >DIAMDIP 4 4 I > >The item 'dip' is the angle that the bed dips from the horizontal. >The item 'azimuth' is the direction of strike of the bed using azimuthal > measurements (N = 0, E = 90, S = 180, W = 270) >The item 'marker' is used to specify the symbol from > geoscamp1.mrk used for plotting. >The item 'description' provides a brief explanation of the > symbol type. >The item 'arrowaz' is used to specify the azimuth of a fault > dip. >The item 'diamaz' is used to specify the azimuth of a fault rake. >The item 'arrowdip' is used to specify the angle associated > with a fault dip arrow symbol. >The item 'diamdip' is used to specify the angle associated > with a fault rake diamond symbol. > > >Jasper Control Point Coverage (jspcontrol) > >PAT > >The point attribute table contains 2 user defined items: > >Item name width output type >VALUE 10 10 I >BOONE_FORM 10 10 C > >The item 'value' is used to specify the elevation of the control > point in feet. >The item 'boone_form' specifies either the top or bottom of the > Boone Formation. > > >Jasper Structure Contour Coverage (jspcontour) > >AAT > >The arc attribute table contains one user defined item: > >Item name width output type >CONTOUR 10 10 I > >The item contour contains a value for the elevation of the base > of the Boone Formation, in feet above Mean Sea Level.