| Online link | https://geo-nsdi.er.usgs.gov/metadata/open-file/96-676/metadata.faq.html |
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| Description | Original geologic data mapped by the author in 1995 and 1996 with emphasis on structures in Miocene basin-fill deposits of the Muddy Creek Formation that may control availability and quality of groundwater. |
| Originators | Williams, Van S. |
| Publication | U.S. Geological Survey Open-File Report 96-676 |
The ARC/INFO version of the digital geologic database of the Yucaipa 7.5'quadrangle consists of five coverages: >yuc_geo (geologic map units and linear geologic entities) >yuc_pts (geologic point features) >yuc_obs (distribution of data stations) >yuc_ptsorn (geologic line ornamentation) >yuc_ldr (map-unit label leaders). Three additional INFO tables are included in the data set: yuc_summ.rel (provides general information about each geologic-map unit, including general lithologic features, geologic age, and geologic origin which applies to all polygons of a specified map unit) lines.rel - (provides information about geologic features displayed as lines on the map. For a complete description of attributes in lines.rel, refer to USGS Open-File Report 97-861: see Entity_and_Attribute_Detail_Citation) points.rel - (provides information about geologic features displayed as points on the map. For a complete description of attributes in points.rel, refer to USGS Open-File Report 97-859: see Entity_and_Attribute_Detail_Citation) 1) The coverage yuc_geo contains information about geologic-map units (represented by polygons) and planar geologic features that bound or break them (e.g. geologic contacts and faults) represented by lines. The polygons have cartographic and geologic attributes contained in yuc_geo.pat; the lines have cartographic and geologic attributes contained in yuc_geo.aat. For display purposes, the geology coverage contains two annotation subclasses: geo contains unit labels, and fault contains formal fault names. 2) The coverage yuc_pts contains analyzable structural data, including information that describes the types and orientation of planar and linear geologic features such as bedding, foliation, fault-plane dip, and fold-hinge plunge. One annotation subclass is included in the geologic points coverage which displays the respective dip and plunge values associated with individual point data. 3) The coverage yuc_obs contains point data that repesent the locality of data stations associated with multiple authors and sources, all of which have contributed geologic data. The locality data represented in yuc_obs serves several purposes: (1) as a proxy for author confidence in unit identification, (2) as a means of identifying each author's contribution, and (3) as a means of identifying data from sources other than the USGS authors. One annotation subclass, obs, identifies five particular locations: four Natural Resources Conservation Service (NRCS) soil profile description localities and one USGS Water Resource Division (WRD) well-log data locality. 4) The coverage yuc_ptsorn stores point data that represent ornamentation for geologic lines (e.g. strike slip arrows, bar and ball on down-thrown block, etc.) 5) The coverage yuc_ldr contains annotation leaders that point to unit labels that are placed outside the perimeter of a particular geologic polygon. These cartographic line entities are attributed with only a single attribute, L-SYMB, and all have the same value, 1.
A complete description of the polygon, line, and point data coding schemes is available in U.S. Geological Survey Open-File Reports OF-97-859, OF-97-860, and OF-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
Geologic units shown on geologic map in Postscript (.ps) and Portable Document Format (.pdf) files
| Label | Definition |
|---|---|
| TAG | A reference label for subgroups of polygons of the geologic-map unit identified by LABL. Every polygon subgroup has certain attributes in common with all other polygons of the map unit, but each subgroup has unique, distinguishing attributes that warrant recognition in the database although those distinguishing characteristics do not provide a basis for recognizing new map units (for example, geographic variations in properties such as grain size, thickness, and clast compositiion). TAG serves one additional purpose: it functions as the relate item that associates each polygon with its attributes stored in the polygon-attribute data table, YUC_SUMM.REL. TAG is defined as LABL followed by an upper-case letter, e.g., QwA, QwB, or QwC, etc. Most map units in the Yucaipa databse have only one TAG designation, TAG A; map units having polygon subsets representing characteristics sufficiently distinct from those of the overall unit include: Qw (QwA, QwB), Qf (QfA, QfB), Qya4 (Qya4A, Qya4B), Qya5 (Qya5A, Qya5B), Qvof3 (Qvof3A, Qvof3B0, Tgr (TgrA, TgrB). |
| LABL | Geologic map unit label. Plain text is substituted for specialized geologic age symbols. |
| PLABL | Coded geologic map unit label used to generate plot labels using appropriate stratigraphic symbols. Geologic units having LABL Mzc, Mzd, Mzfg, Mzg, Mzga, Mzgg, Mzgr, Mzi, Mzmg, Mzmm, Mzpsg, Mzpsm, (Mesozoic), appear in the item PLABL as }c, }d etc.; unit label Trm (Triassic) appears as ^m, in the item PLABL. The replacement characters call up stratigraphic age symbols from the GeoAge Font Group. Map unit labels will plot on derivative map plots with appropriate stratigraphic symbols if PLABL is used as the source of unit labels. |
| SHDFIL | Polygon fill pattern from shadeset geology2.shd (included in the data package) |
| SHDPS | Polygon color from shadeset scamp2.shd (included in the data package) and used to generate the map plotfile |
| THICK | Thickness data for geologic unit (sedimentary and surficial), where relevant |
| NAME | Name of each geologic-map unit |
| UNIQUE | Allows for the description of geologic properties that are unique to a particular polygon or group of polygons |
| SOURCE | Allows identification of sources from which polygon data have been compiled other than the U.S. Geological Survey authors of this database |
INFO table containing general information about each geologic-map unit, including lithologic features, geologic age, and geologic origin which applies to all polygons of a specified map unit.
| Label | Definition |
|---|---|
| TAG | The data-base item that relates polygon subgroups to their associated map unit identified in the polygon feature attribute table, yuc_geo.pat. |
| AGEMIN | The minimum age (youngest possible age) for a geologic-map unit. Data include mimimum estimates for (1) age of formation of sedimentary and igneous rocks and surficial materials, (2) metamorphic age for geologic materials that have been metamorphosed, (3) deformation age for geologic materials that have been deformed (folded, faulted, penetratively deformed, brecciated, fractured), and (4) age of alteration for stained and altered geologic materials. Data is represented by coded entries (Matti and others, 1997b). |
| AGEMAX | The maximum age (oldest possible age) for a geologic-map unit. Data include maximum estimates for (1) age of formation of sedimentary and igneous rocks and surficial materials, (2) metamorphic age for geologic materials that have been metamorphosed, (3) deformation age for geologic materials that have been deformed (folded, faulted, penetratively deformed, brecciated, fractured), and (4) age of alteration for stained and altered geologic materials. Data is represented by coded entries (Matti and others, 1997b). |
| AGECON | Indicates the basis for assigning a geologic age to a map unit and the confidence with which that age is assigned. Data is represented by coded entries (Matti and others, 1997b). |
| TYPE | Provides a hierarchical classification of the general lithologic types occurring in a geologic-map unit, including whether a particular map unit is a bedrock unit or a surficial unit. Data is represented by coded entries (Matti and others, 1997b). |
| CLASS | Provides the stratigraphic classification of a rock unit in terms of the North American Code of Stratigraphic Nomenclature. Data is represented by coded entries (Matti and others, 1997b). |
| SURFACE | Identifies geologic and geomorphic characteristics of the upper surface of surficial geologic units. Data is represented by coded entries (Matti and others, 1997b). |
| ORIGIN | Provides coded information for the geologic origin of a map unit. Data is represented by coded entries (Matti and others, 1997b). |
Geologic lines, which include features such as faults, contacts, and terraces. (A complete description of each line type is available in the data table, lines.rel.)
| Label | Definition |
|---|---|
| L-SYMB | Calls up the appropriate line symbol from the lineset geoscamp2.lin (included in the data package) |
| L-TAG | Consists of a character and numerical value e.g. C17 which allows the user to relate the line entity to its corresponding definition in the INFO table lines.rel. Geologic-line types in yuc_geo and their corresponding definitions in lines.rel include (abbreviated from Matti and others, 1997c): |
| L-AGECON | Indicates the confidence with which a geologic age has been assigned to each linear entity |
| L-NAME | Formal name, where applicable, of linear geologic features |
| L-UNIQUE | Allows for the description of attributes that are unique to a particular linear feature or segment of a feature, e.g. faults having associated seismicity |
| L-SOURCE | Allows identification of sources other than the U.S. Geological Survey authors of this SCAMP products from which line data have been compiled |
| L-AGEMAX | Coded statement of the maximum age (oldest age) estimated for geologic contacts and faults or for segments of such features |
| L-AGEMIN | Coded statement of the minimum age (youngest age) estimated for geologic contacts and faults or for segments of such features |
Structural point data.
| Label | Definition |
|---|---|
| P-SYMB | Calls the point-type from the markerset geoscamp2.mrk (included in the data package) |
| P-TAG | Consists of a character(s) and numerical value e.g. FN42 which allows the user to relate the point entity to its corresponding definition in the INFO table points.rel. |
| P-SOURCE | Allows identification of all sources of geologic data represented in the Yucaipa geologic map database |
| P-UNIQUE | Allows for the description of attributes uniquely associated with a particular point datum location |
| P-AGECON | Indicates the confidence with which a geologic age is assigned to a point feature |
| P-DIP | Dip of planar point features |
| P-STRIKE | Azimuth strike of planar features |
| P-DIPDIR | Azimuthal direction of dip Note: To date, there is no other way to indicate to the user the cardinal direction of dip using the traditional convention (traditional geologic notation allows a quadrant designation following the dip value). |
| P-PLUNGE | Lineation plunge value |
| P-BEARING | Azimuthal direction of lineation bearing |
| P-AGEMIN | Coded statement of the minimum age (youngest age) estimated for geologic features represented by point data |
| P-AGEMAX | Coded statement of the maximum age (oldest age) estimated for geologic features represented by point data |
Data that repesent the locality of data stations associated with multiple authors and sources
| Label | Definition |
|---|---|
| P-SYMB | Calls the point-type from the markerset geoscamp2.mrk (included in the data package) |
| P-TAG | Point tag which consists of a character(s) and numerical value; allows the user to relate the point entity to its corresponding definition in the data table, points.rel |
| P-SOURCE | Allows identification of sources from which point data have been compiled other than the U.S. Geological Survey authors of this product |
| P-UNIQUE | Allows for the description of attributes uniquely associated with a particular point datum location |
| P-STAT | Alphanumeric identification of a particular datum location |
Line ornamentation
| Label | Definition |
|---|---|
| P-SYMB | Calls the point-type from the markerset geoscamp2.mrk (included in the data package) |
| P-TAG | Point tag which consists of a character(s) and numerical value; allows the user to relate the point entity to its corresponding definition in the data table, points.rel |
Unit label annotation leaders
| Label | Definition |
|---|---|
| L-SYMB | Coded integer symbol (1) that calls up the apprporiate line symbol in lineset geoscamp2.lin |