Geologic map of the Grand Junction quadrangle, Mesa County, Colorado

Online link	https://geo-nsdi.er.usgs.gov/metadata/map-mf/2363/metadata.faq.html
Description	This 1:24,000-scale geologic map of the Grand Junction 7.5' quadrangle, in support of the USGS Western Colorado I-70 Corridor Cooperative Geologic Mapping Project, provides new interpretations of the stratigraphy, structure, and geologic hazards in the ar
Originators	Scott, Robert B.; Carrara, Paul E.; Hood, William C.; and Murray, Kyle E.

States or counties

Mesa

Overview of attributes

The databases in this report were compiled in ARC/INFO, a commercial
Geographic Information System (Environmental Systems Research
Institute, Redlands, California).  Almost all the attributes in the
various attribute tables of the coverages included in the report are
set or calculated by Arc/Info.  The exceptions are "coveragename"-ID,
LTYPE, PTYPE, PTTYPE, BKTYPE, SAMPNO, STRIKE, and DIP.
"coveragename"-ID is required by internal policy to be sequential.
This ensures the highest compatibility of our databases with other GISs.
Therefore "coveragename"-ID is calculated equal to "coveragename"#,
which is a unique, sequential integer assigned by Arc/Info to each
data record.
LTYPE, PTYPE, and PTTYPE are author added items to the coverage AAT
or PAT that are used to describe the type of line (LTYPE), area (PTYPE),
or point (PTTYPE) being recorded.  All coverages with AAT and PAT
present include these items in the data structure, although in some
cases these items are not used.  Each has WIDTH 35, OUTPUT 35, TYPE C.
BKTYPE is an author added item that contains information about the
type of rock observed at a certain point.  It has WIDTH 2, OUTPUT 2,
TYPE C.  This item is only recorded in the table MA-BLKS.PAT
STRIKE and DIP are author added items to the coverage PAT that record
information about the orientation of planar geologic structures.  Both
have WIDTH 3, OUTPUT 3, TYPE I.  These items are only recorded in the
table MA-STRC.PAT

This report, madb.txt, madb.pdf, or madb.ps AND mageo.txt, mageo.pdf, or mageo.ps

MA-GEOL.PAT

polygon attribute table

Label	Definition
`PTYPE`	Labels of geologic units and areas of water.

MA-GEOL.AAT

arc attribute table

Label	Definition
`LTYPE`	The type of lines used in the geology layer. Includes all faults, as well as lines bounding polygons that define geologic units.

MA-STRC.PAT

Attribute table of MA-STRC.

Label	Definition
`PTTYPE`	The type of planar feature which was observed and the orientation of which was measured at this point.
`DIP`	The inclination of planar structures measured in degrees down from horizontal.
`STRIKE`	The orientation of a horizontal line in an inclined planar structure measured in degrees clockwise from north.

MA-STRC.AAT

Attribute table of MA-STRC.

Label	Definition
`LTYPE`	The type of fold axis or other structural linear feature that does not bound geologic units. Faults and contacts are described in a seperate coverage.

MA-BLKS.PAT

Attribute table of MA-BLKS.

Label	Definition
`PTTYPE`	Type of melange block observed at this point
`BKTYPE`	More detailed information about the type of melange block observed at this point.

MA-ALTR.PAT

Attribute table of MA-ALTR.

Label	Definition
`PTYPE`	Designates areas of hydrothermal alteration

MA-ALTR.AAT

Attribute table of MA-ALTR.

Label	Definition
`LTYPE`	Type of line

MA-QUAD.PAT

Attribute table of MA-QUAD.

Label	Definition
`PTYPE`	Used to delineate areas of water in the mapped area

MA-QUAD.AAT

Attribute table of MA-QUAD.

Label	Definition
`LTYPE`	Type of line recorded in the quadrangle index coverage.

MA-CORR.PAT

Attribute table of MA-CORR.

Label	Definition
`PTYPE`	Labels of geologic units and areas of water.

MA-CORR.AAT