Geologic map and digital database of the Porcupine Wash 7.5 minute quadrangle, Riverside County, California

Online link https://geo-nsdi.er.usgs.gov/metadata/open-file/01-30/metadata.faq.html
Description This data set maps and describes the geology of the Porcupine Wash 7.5 minute quadrangle, Riverside County, southern California. The quadrangle, situated in Joshua Tree National Park in the eastern Transverse Ranges physiographic and structural province,
Originators Powell, Robert E. and Cossette, Pamela M.
Publication U.S. Geological Survey Open-File Report USGS OF 01-30

Related topics

States or counties

Overview of attributes

The Geologic Map and Digital Database of the Porcupine Wash
7.5 minute quadrangle includes five geospatial datasets as
ARC/INFO coverages: pwash_geo (geology), pwash_dk (dikes),
pwash_str (structural point data), pwash_orn (structural
line ornamentation), and pwash_ldr (annotation 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 and in the Porcupine Wash Open-File Report from which
this metadata is derived.
(1) The coverage pwash_geo includes the following feature
attribute tables: (a) a polygon feature attribute table
(pwash_geo.pat) that describes the geospatial distribution
of rock units represented in the Postscript (.ps) and
Portable Document Format (.pdf) plotfiles of the geologic
maps; (b)region subclass attribute tables
(pwash_geo.patmetunits, pwash_geo.patpedunits,
pwash_geo.patplutunits, pwash_geo.patsedunits,
pwash_geo.patveinunits, pwash_geo.patvolcunits) that
describe all geologic units contained in the database; and
(c) an arc feature attribute table (pwash_geo.aat) that
describes the contacts and faults that bound rock-unit
polygons.  For display purposes in the .ps and .pdf
geologic maps, the geology coverage includes two annotation
subclasses: anno.geo, which contains unit labels derived
from the coded item PLABL, and anno.fault, which contains
formal fault names.
(2) The coverage pwash_dk includes an arc attribute table
(pwash_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 polygons at a scale of 1:24,000.
(3) The coverage pwash_str includes a point attribute table
(pwash_str.pat) that describes geologic structural point
data, including the types and orientation of bedding,
foliation, and lineation. An annotation subclass
(anno.value) displays the dip or plunge values associated
with point data.
(4) The coverage pwash_orn includes a point attribute table
(pw_ptsorn.pat) that describes structural line
ornamentation.  An annotation subclass (anno.line) displays
the sense of movement on a fault.
(5) The coverage pwash_ldr includes an arc attribute table
(pwash_ldr.pat) that describes annotation leaders.  Unit
symbols that are placed outside the perimeter of a
particular polygon identify that polygon with annotation
leaders.

http://pubs.usgs.gov/of/2001/0030/ A complete description of the polygon, line, and point data coding schemes is available in U.S. Geological Survey Open-File Reports 97-859, OFR 97-860, and OFR 97-861 (full source citations follow): Matti, J.C., Miller, F.K., Powell, R.E., Kennedy, S.A., Bunyapanasarn, T.P., Koukladas, Catherine, Hauser, R.M., and Cossette, P.M., 1997b, Geologic-point attributes for digital geologic-map databases produced by the Southern California Areal Mapping Project (SCAMP), Version 1.0: U.S.Geological Survey Open-File Report 97-859 Matti, J.C., Miller, F.K., Powell, R.E., Kennedy, S.A., and Cossette, P.M., 1997c, Geologic-polygon attributes for digital geologic-map databases produced by the Southern California Areal Mapping Project (SCAMP), Version 1.0: U.S.Geological Survey Open-File Report 97-860 Matti, J.C., Powell, R.E., Miller, F.K., Kennedy, S.A., Ruppert, K.R., Morton, G.L., and Cossette, P.M., 1997a, Geologic-line attributes for digital geologic-map databases produced by the Southern California Areal Mapping Project (SCAMP), Version 1.0: U.S.Geological Survey Open-File Report 97-861

pwash_geo.pat

Geologic units shown on geologic map in Postscript (.ps) and Portable Document Format (.pdf) files

Label Definition
LABL Geologic map unit label. Plain text is substituted for conventional geologic age symbols (Pr for Proterozoic; Tr for Triassic) and unit label subscripts as shown on map
PLABL Coded geologic map unit label used to generate plot label.
SHDPS Coded integer that relates polygon to color in shadeset (scamp2.shd)
SHDFIL Coded integer that relates polygon to fill pattern in shadeset (geology2.shd)
NAME Geologic name of map unit (see list under LABL attribute)

pwash_geo.patmetunits

Metamorphic units contained in the database

Label Definition
LABL Metamorphic unit label
PARENT Label for metamorphic unit of next higher stratigraphic rank than that of unit indicated in LABL
CHILD Labels for metamorphic units of lower stratigraphic rank than that of unit indicated in LABL
UTYPE Class of geologic unit
NAME Name of metamorphic unit
AGE Age of metamorphic unit
PLABL Coded geologic map unit label used to generate plot label.
SHDPS Coded integer that relates polygon to color in shadeset scamp2.shd
SHDFIL Coded integer that relates polygon to fill pattern in shadeset geology2.shd

pwash_geo.patpedunits

Pedogenic units contained in the database

Label Definition
LABL Pedogenic unit label
PARENT Label for pedogenic unit of next higher stratigraphic rank than that of unit indicated in LABL
CHILD Labels for pedogenic units of lower stratigraphic rank than that of unit indicated in LABL
UTYPE Class of geologic unit
NAME Name of pedogenic unit
AGE Age of pedogenic unit
PLABL Coded geologic map unit label used to generate plot label.
SHDPS Coded integer that relates polygon to color in shadeset scamp2.shd
SHDFIL Coded integer that relates polygon to fill pattern in shadeset geology2.shd

pwash_geo.patplutunits

Plutonic units contained in the database

Label Definition
LABL Plutonic unit label
PARENT Label for plutonic unit of next higher stratigraphic rank than that of unit indicated in LABL
CHILD Labels for plutonic units of lower stratigraphic rank than that of unit indicated in LABL
UTYPE Class of geologic unit
NAME Name of plutonic unit
AGE Age of plutonic unit
PLABL Coded geologic map unit label used to generate plot label.
SHDPS Coded integer that relates polygon to color in shadeset scamp2.shd
SHDFIL Coded integer that relates polygon to fill pattern in shadeset geology2.shd

pwash_geo.patsedunits

Sedimentary units contained in the database

Label Definition
LABL Sedimentary unit label
PARENT Label for sedimentary unit of next higher stratigraphic rank than that of unit indicated in LABL
CHILD Labels for sedimentary units of lower stratigraphic rank than that of unit indicated in LABL
UTYPE Class of geologic unit
NAME Name of sedimentary unit
AGE Age of sedimentary unit
PLABL Coded geologic map unit label used to generate plot label.
SHDPS Coded integer that relates polygon to color in shadeset scamp2.shd
SHDFIL Coded integer that relates polygon to fill pattern in shadeset geology2.shd

pwash_geo.patveinunits

Hydrothermal vein units contained in the database

Label Definition
LABL Hydrothermal vein unit label
PARENT Label for hydrothermal vein unit of next higher stratigraphic rank than that of unit indicated in LABL
CHILD Labels for hydrothermal vein units of lower stratigraphic rank than that of unit indicated in LABL
UTYPE Class of geologic unit
NAME Name of hydrothermal vein unit
AGE Age of hydrothermal vein unit
PLABL Coded geologic map unit label used to generate plot label.
SHDPS Coded integer that relates polygon to color in shadeset scamp2.shd
SHDFIL Coded integer that relates polygon to fill pattern in shadeset geology2.shd

pwash_geo.patvolcunits

Volcanic and hypabyssal units contained in the database

Label Definition
LABL Volcanic or hypabyssal unit label
PARENT Label for volcanic or hypabyssal unit of next higher stratigraphic rank than that of unit indicated in LABL
CHILD Labels for volcanic or hypabyssal units of lower stratigraphic rank than that of unit indicated in LABL
UTYPE Class of geologic unit
NAME Name of volcanic or hypabyssal unit
AGE Age of volcanic or hypabyssal unit
PLABL Coded geologic map unit label used to generate plot label.
SHDPS Coded integer that relates polygon to color in shadeset scamp2.shd
SHDFIL Coded integer that relates polygon to fill pattern in shadeset geology2.shd

pwash_geo.aat

Geologic contacts and faults that bound rock-unit polygons

Label Definition
LTYPE Linear geologic feature type
CONTACT_RL Contact class
MPR_CNT_RL (no definition)
L_NAME Formal name of linear geologic feature
L_AGE Geologic age of linear feature
FAULT_RL Fault class
FAULT Fault strand
L-SYMB Coded integer symbol that relates arc to cartographic line symbol in lineset look-up table (geoscamp2.lin)
L-TAG Coded alpha-numerical symbol that relates arc to definition of line type in dictionary look-up table (lines.rel). For description of attributes in line classification dictionary, refer to USGS Open-File Report 97-861 (see Entity_and_Attribute_Detail_Citation)
labl Geologic map unit label, in plain text
LABL Geologic map unit label, in plain text

pwash_dk.aat

Dikes

Label Definition
LTYPE Linear feature type
LABL Geologic map unit label, in plain text
L-SYMB Coded integer symbol that relates arc to cartographic line symbol in lineset look-up table (geoscamp2.lin)

pwash_str.pat

Structural point data

Label Definition
P-TAG Coded alpha-numerical symbol that relates point to definition of point type in dictionary look-up table (points.rel). For description of attributes in point classification dictionary, refer to USGS Open-File Report 97-859 (see Entity_and_Attribute_Detail_Citation)
P-SYMB Coded integer symbol that relates point to cartographic point symbol in markerset look-up table (geoscamp2.mrk)
P-STRIKE Azimuthal strike of planar feature
P-DIP Dip of planar feature
P-DIPDIR Azimuthal direction of dip of planar feature
P-PLUNGE Plunge of linear feature
P-BEARING Azimuthal direction of plunge of linear feature
P-SOURCE Source of data

pw_ptsorn.pat

Line ornamentation

Label Definition
P-TAG Coded alpha-numerical symbol that relates point to definition of point type in dictionary look-up table (points.rel). For description of attributes in point classification dictionary, refer to USGS Open-File Report 97-859 (see Entity_and_Attribute_Detail_Citation)
P-SYMB Coded integer symbol that relates point to cartographic point symbol in markerset look-up table (geoscamp2.mrk)

pwash_ldr.aat

Annotation leader

Label Definition
L-SYMB Coded integer symbol (1) that relates arcs to cartographic line symbol in lineset look-up table (geoscamp2.lin)