| Online link | https://geo-nsdi.er.usgs.gov/metadata/open-file/95-51/metadata.faq.html |
|---|---|
| Description | This Open-File report is a digital geologic map database. This digital map database is compiled from previously published sources combined with some new mapping and modifications in nomenclature. The geologic map database delineates map units that are |
| Originators | Yerkes, Robert F. and Campbell, Russell H. |
| Publication | U.S. Geological Survey Open-File Report 95-51 |
Version 1.0 of the Corona North 7.5' quadrangle comprises three ARC/INFO coverages, of which two contain geologic data, and one contains cartographic features: crn_geo (geology), crn_str (structural data), and crn_ano (annotation and leaders). Geologic data represented by line entities and the polygons they delineate are contained in the coverage CRN_GEO. For display purposes, the annotation coverage contains three annotation subclasses: anno.geo contains unit labels, anno.fault contains fault names, and anno.mountain contains peak names. Geological point data includes site-specific information describing the types and the orientation of bedding, foliation, and lineations. Annotation is respective dip and plunge values associated with individual point data. >CRN_GEO.PAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 AREA 4 12 F 3 > 5 PERIMETER 4 12 F 3 > 9 CRN_GEO# 4 5 B - > 13 CRN_GEO-ID 4 5 B - > 17 LABL 35 35 C - > 52 SHD 3 3 I - > 55 PLABL 35 35 C - > 90 SHDFIL 3 3 I - > 93 NAME 200 200 C - > >CRN_GEO.AAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 FNODE# 4 5 B - > 5 TNODE# 4 5 B - > 9 LPOLY# 4 5 B - > 13 RPOLY# 4 5 B - > 17 LENGTH 4 12 F 3 > 21 CRN_GEO# 4 5 B - > 25 CRN_GEO-ID 4 5 B - > 29 LTYPE 35 35 C - > 64 L-SYMB 3 3 I -
http://pubs.usgs.gov/of/2002/0022/pdf/README.pdf
Geologic units (LABL) and their corresponding names (NAME) identified in the Corona North 7.5' quadrangle
| Label | Definition |
|---|---|
| LABL | geologic map unit label, in plain text |
| PLABL | Geological map unit label used to generate plot labels with relevant stratigraphic symbols. The geologic units with LABL designating Mesozoic (Mz) have keystroke substitute characters, }, that call their corresponding symbols from the Geoage Font Group. Geologic map unit labels will plot on derivative map plots with appropriate stratigraphic symbols if PLABL is used as the source for unit labels. |
| SHD | polygon color (as integer value) from shadeset alc1.shd |
| SHDFIL | polygon fill pattern (as integer value) from shadeset geology2.shd |
| NAME | Geologic name of map unit (see list under LABL attribute) |
Geologic features such as contacts and faults that bound rock-unit polygons
| Label | Definition |
|---|---|
| LTYPE | Description of types of lines on the geologic map (contact, fault). |
| L-SYMB | stores appropriate line symbol value from the lineset geoscamp2.lin |
Geological point data includes site-specific information describing the types and the orientation of bedding, foliation, and lineation. One annotation subclass is included in the geologic points coverage, CRN_STR which displays the respective dip and plunge values associated with individual point data.
| Label | Definition |
|---|---|
| PTTYPE | describes type of point data (bedding, horizontal bedding, foliation) |
| P-SYMB | Coded integer value that relates point to cartographic point symbol in markerset geoscamp2.mrk |
| STRIKE | Azimuthal strike of planar feature |
| DIP | Dip of planar feature |
Annotation leaders
| Label | Definition |
|---|---|
| L-SYMB | Coded integer value (1) that relates arcs to cartographic line symbol in lineset geoscamp2.lin |