The Geologic Map and Digital Database of the Pinto Mountain 7.5 minute quadrangle
includes eight double precision ARCINFO coverages: pmtn_geo (geology); pmtn_flt
(faults and structural line ornamentation); pmtn_dk (dikes); str_bedding,
str_foliation, str_lineatn, and str_mnrflds (structural point data); and
pmtn_carto (cartographic elements, geologic unit annotation and leaders).
Geospatial entities in ARC/INFO coverages have the following software-defined
attributes: <cover>.pat contains AREA, PERIMETER, cover#, and cover-ID;
<cover>.aat contains FNODE#, TNODE#, LPOLY#, RPOLY#, LENGTH, cover#, and
cover-ID.  User-defined attributes are described in detail below.
(1) The coverage pmtn_geo includes the following feature tables: (a) A polygon
attribute table (pmtn_geo.pat) that lists labels for the geological
characteristics and identifies plot labels for the rock units represented in the
Postscript (.ps) and Portable Document Format (.pdf) plotfiles of the geologic
maps; (b) Region subclass attribute tables that describe the geospatial
distribution of rock units represented in the Postscript (.ps) and Portable
Document Format (.pdf) plotfiles of the geologic maps (pmtn_geo.patrockunit), the
hierarchical array of stratigraphic parents of rock units in the crystalline
basement (pmtn_geo.patbasement1, pmtn_geo.patbasement2, pmtn_geo.patbasement3,
pmtn_geo.patbasement4), the hierarchical array of stratigraphic parents of rock
units in sedimentary and volcanic cover to the basement rocks
(pmtn_geo.patcover1, pmtn_geo.patcover2), and the hierarchical array of
stratigraphic parents of surficial units (pmtn_geo.patsurficial1,
pmtn_geo.patsurficial2, pmtn_geo.patsurficial3, pmtn_geo.patsurficial4,
pmtn_geo.patsurficial5).  This hierarchy of stratigraphic units can be related in
ArcInfo, ArcMap or ArcView to display or plot more generalized, derivative
geologic maps than that represented in Postscript (.ps) or Portable Document
Format (.pdf) files.  (c) A region subclass attribute table that describes
surface units (veneers) (pmtn_geo.patsurfunit).  (d) A region subclass attribute
table that describes mixed surface units (pmtn_geo.patmxd_surfunit). (e) A region
subclass attribute table that shows those areas where unit identification is
uncertain (pmtn_geo.patident).  (f) An arc attribute table (pmtn_geo.aat) that
describes the contacts that bound rock-unit polygons.
(2) The coverage pmtn_flt contains and displays the complete distribution of
fault features within the extent of the Pinto Mountain quadrangle.  Structural
line ornamentation is included in this layer as point data.  Faults are
characterized in two route attribute tables (pmtn_flt.ratsegment and
pmtn_flt.ratfault).
(3) The coverage pmtn_dk includes an arc attribute table (pmtn_dk.aat) that
describes hypabyssal dikes. Dikes are planar intrusive features that intersect
the Earth's surface as linear features; they are represented as lines where their
surface widths are too narrow to be represented as areal features at a scale of
1:24,000.
(4) The coverages str_bedding, str_foliation, str_lineatn, and str_mnrflds
include point attribute tables (<cover_name>.pat) that describe geologic
structural point data, including the types and orientation of bedding, foliation,
lineation, and minor fold axes, respectively. Annotation subclasses (anno.dip -
planar data, anno.plunge - non-planar data) display the dip or plunge value
associated with each point datum.
(5) The coverage pmtn_carto includes both geologic unit symbol annotation and an
arc attribute table (pmtn_carto.aat) that displays annotation leaders.  Unit
symbols placed outside the perimeter of a particular polygon are identified by
annotation leaders.

http://pubs.usgs.gov/of/2002/0491/pdf/pmtn_pamph.pdf

Polygon attribute table that stores alphanumeric symbols for units that characterize lithologic type, surface veneer, landform, and age of earth materials represented by each polygon. In addition, the table stores coded stratigraphic unit symbols.

Geologic units contained in the database that are displayed on the geologic map in the Postscript (.ps) and Portable Document Format (.pdf) files

First-order stratigraphic parents of crystalline basement rock units

Second-order stratigraphic parents of crystalline basement rock units

Third-order stratigraphic parents of crystalline basement rock units

Fourth-order stratigraphic parents of crystalline basement rock units

First-order stratigraphic parents of surficial rock units

Second-order stratigraphic parents of surficial rock units

Third-order stratigraphic parents of surficial rock units

Fourth-order stratigraphic parents of surficial rock units

Fifth-order stratigraphic parents of surficial rock units

First-order stratigraphic parents of cover rock units

Second-order stratigraphic parents of cover rock units

Surface units (veneers)

Mixed surface units (veneers)

Confidence in rock-unit identification

Geologic contacts, including fault contacts, that bound rock-unit polygons and map boundary

Faults

Fault segments: Arcs between or extending from fault intersections

Faults, fault strands, fault zones, fault systems, and fault groups

Dikes

Planar structural point data showing bedding orientation (strike, dip, direction of dip)

Planar structural point data showing foliation orientation (strike, dip, direction of dip)

Linear structural point data showing lineation orientation (bearing, plunge)

Linear structural point data showing minor fold axis orientation (bearing, plunge)

Table that summarizes name, age, origin, and lithology of rock units.

Data table that stores display criteria and data (rock unit colors/SHD, patterns/SHDFIL) to facilitate plotting of derivative maps. Symbolsets represented are: scamp2.shd (colors), geology2.shd (patterns).

Data (lookup) table that stores symbols that allow surface veneers to be represented as pattern overlays.

Data (lookup) table that stores symbols that allow mixed surface veneers to be represented as pattern overlays.

An INFO relate created by the map author relating display.plt by UNIT_LABEL

Annotation leaders and rock_unit labels derived from pmtn_geo.pat, plot_label