Recent updates to the data:
In March 2004 edition 1.0 of the data set was transitioned to storage in an Oracle RDBMS using the ArcSDE geodatabase model. The result (this version) is designated Edition 20040331.
Illinois State Geological Survey, 1995, Structural Features in Illinois - 1995 - Line Features (Axial or Flexure) of Anticlines, Synclines and Monoclines: ISGS GIS Database GISDB_BEDGEO.IL_Struct_Feat_Clines_1995_Ln, Illinois State Geological Survey, Champaign, Illinois.This is part of the following larger work.Online Links:
Nelson, W. John , 1995, Structural Features in Illinois: ISGS Bulletin 100, Illinois State Geological Survey, Champaign, Illinois, USA.
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees.
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is Geodetic Reference System 80.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257222.
Sequential unique whole numbers that are automatically generated.
Coordinates defining the features.
GNTYPE - General structural type 1 - plunging anticline or anticlinal nose 2 - doubly plunging anticline 3 - asymmetrical anticline 4 - monocline 5 - syncline 6 - anticline (unspecified type)
GEOHORIZON and GEOHORIZON2 indicate the names of the geologic formation on which the feature is mapped. The ISGS Geologic Formation Numbering Code, a unique four digit number, was used to indicate these designations. If no horizon is indicated a code of 9999 is entered, meaning that the feature was mapped at the surface. In some cases there is more than one geologic formation associated with a mapped structural feature; in this case the GEOHORIZON2 field is used to indicate the additional geologic formation code number.
Code from Values for Bull. Geologic GEOHORIZON and 100 Description GEOHORIZON2 ----- ----------- -------------- HC top of Herrin Coal Member (#6) 2660 SC top of Springfield Coal Member (#5) 2790 CC top of Colchester Coal Member (#2) 3020 BC top of Beach Creek (Barlow) Limestone 4350 YT top of Yankeetown Sandstone 4480 SG top of St. Genevieve Limestone 5060 KE top of Keokuk Limestone 5350 NA base of New Albany Shale 5480 SL top of Silurian System 6700 GL top of Galena Group 7550 GW top of Glenwood Formation 8170 SP top of St. Peter Sandstone 8330 FR top of Franconia Formation 8660 IG top of Ironton/Galesville Sandstone 8690 EC top of Lightsville sand, in EauClaire Formation 8760 MS top of Mt. Simon Sandstone 8810 PC top of Precambrian (Age) 9200
NAME - the name of the structure
NUM - The item NUM is an unique value assigned to each member of a GNTYPE. For example, the Aden Anticline is feature number 1 of the Anticline general type, while Birkbeck Syncline is feature number 1 of the Syncline general type. Thus the combination of GNTYPE and NUMBER can be used to uniquely identify any feature. The relationship of NAME and NUM is shown in the following table.
NAME NUM ------------------------------------------- ------ Aden Anticline 1 Ancona Anticline 2 Ashton Anticline 3 Assumption Anticline 4 Astoria Anticline 5 Aurora Syncline 48 Ayers Anticline 7 Bardolph Anticline 9 Battle Ford Syncline 49 Bay Creek Syncline 50 Benton Anticline 12 Birkbeck Syncline 1 Black Jack Syncline 2 Bogota-Rinard Syncline 3 Boyd Anticline 14 Bremen Anticline 15 Brereton Anticline 16 Bridgeport Anticline 132 Brushy Anticline 17 Bryant Syncline 4 Bushnell Syncline 5 Campbell Hill Anticline 20 Canton Syncline 6 Charleston Monocline 6 Centralia Anticline 26 Clay City Anticline 27 Clinton Syncline 7 Colfax Syncline 8 Colmar Anticline 28 Columbia Syncline 9 Cooks Mills Anticline 29 Cooksville Anticline 123 Cordes Anticline 30 Cottage Anticline 31 Cresent City Anticline 122 Dahlgren Anticline 32 Divide Anticline 138 Downs Anticline 35 Du Quoin Monocline (east branch) 7 Du Quoin Monocline (main branch)(N) 8 Du Quoin Monocline (main branch)(S) 1 Du Quoin Monocline (main branch)(central) 9 Eagle Valley Syncline (Fluorspar Area) 10 Edgar Monocline 4 Elkton Anticline 140 Elmwood Syncline 12 Fairman Anticline 38 Fairview Syncline 13 Farmington Anticline 40 Fishhook Anticline 41 Galena Junction Syncline 14 Galena Syncline 15 Gilead Anticline 43 Goldengate Anticline 45 Graham-Ginte Syncline 16 Hardin Anticline 139 Harrison Creek Anticline 47 Herscher Anticline (S) 120 Herscher-Northwest Anticline 121 Hume Anticline 125 Iola Anticline 137 Irvington Anticline 141 Kenner Anticline 127 Kincaid Anticline 136 King Anticline 53 Leaf River Anticline 55 Lincoln Anticline 57 Littleton Anticline 58 Louden Anticline 59 Marshall-Sidell Syncline 22 Mattoon Anticline 65 McCormick Anticline 66 Media Anticline 67 Meppen Syncline 23 Millbrig Syncline 24 Minick Anticline 69 Monroe City Syncline 25 Murdock Syncline 26 New Burnside Anticline 71 Nilwood Anticline 72 Nutwood Anticline 74 Oregon Anticline 80 Osman Monocline 5 Otter Creek Syncline 30 Patoka Anticline 83 Pecatonica Anticline 133 Peru Monocline 3 Pinckneyville Anticline 86 Pittsburg Anticline 87 Pittsfield Anticline 88 Polo Syncline 32 Portage Syncline 33 Pottsville Syncline 34 Ripley Syncline 36 Salem Anticline 94 Saratoga Anticline 142 Sciota Anticline 96 Sesser Anticline 97 Seville Anticline 98 Smallpox Creek Syncline 39 St. David Anticline 92 Table Grove Syncline 43 Thebes Anticline 107 Tolu Arch (Anticline) (Hicks Dome) 143 Troy-Brussels Syncline 44 Tuscola Anticline 109 Uptons Cave Syncline 45 Valmeyer Anticline 110 Vergennes Anticline 111 Versailles Anticline 112 Vinegar Hill Syncline 46 Waterloo-Dupo Anticline 116 Woburn Anticline 118 unnamed Anticline 134 unnamed Anticline 135 unnamed Anticline 131 unnamed Anticline 126 unnamed Monocline (Bodenschatz-Lick Fault) 10 unnamed Monocline (Ste. Genevieve Fault) 11
These data are for use at a scale of 1:500,000 or smaller only. They are appropriate for use in regional thematic analysis, for display purposes, and for mapping environmental phenomena related to them.The data are not appropriate as a geodetic, legal or engineering base. The data set was not and is not intended as a substitute for surveyed locations, such as can be determined by a registered Public Land Surveyor. Although useful in a GIS as a reference base layer for maps, the data set has no legal basis in the definition of boundaries or property lines.
Nelson, W. John, 1993, Structural Features in Illinois, Plate 1: ISGS Bulletin 100, Illinois State Geological Survey, Champaign, Illinois.
Nelson, W. John, 1993, Original Mylar Separates for Plate 1 of Structural Features in Illinois: ISGS Bulletin 100, Illinois State Geological Survey, Champaign, Illinois.
Greene, Amelia V., 1990, Illinois Geographic Information System: An Index to Automated Statewide Databases: Illinois State Water Survey Circular 175, Illinois State Water Survey, Champaign, Illinois.
Treworgy, Janis D., 1981, Structural Features in Illinois - A Compendium: ISGS Circular 519, Illinois State Geological Survey, Champaign, Illinois.
TIC # N. Latitude (degrees) W. Longitude (degree)
06 ~ 37 91 51 37 90 53 ~ 37 88 20 ~ 42 91 23 ~ 42 88 26 41 91 29 41 88 32 40 91 35 40 88 38 39 91 41 39 88 45 38 90 47 38 88
Note: a ( ~ ) tilde indicates the primary tics used for the statewide map.
The features were imported into the ISGS SDE enterprise database following steps outlined in ISGS procedure GISDB_0009.
As the word NUMBER is a reserved word in Oracle, the field NUMBER was renamed to NUM.
Metadata updated.
Person who carried out this activity:
, ISGS Terms of Use.Online Links:
, University of Illinois Web Privacy Notice.Online Links:
, University Copyright Policy (stated in the General Rules Concerning University Organization and Procedure, Article III, Section 4).Online Links:
, Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign.Online Links:
The published (Plate 1) map from ISGS Bulletin 100 was the source for feature attributes. Attribute code assignments were checked by three individuals and are believed to fully representative of the source document.
Horizontal positional accuracy of this data with respect to the source map was verified by three individuals by visual comparison (manual overlay) of source maps and hard-copy plots. Arcs within one line-width of source mylars were deemed acceptable. Consult Bull. 100 and its sources for information on the derivation of structure locations.
This data set contains anticlines, synclines and monoclines shown as line features on Plate 1, ISGS Bull. 100. This feature class must be used in conjunction with the other feature classes in this dataset for a full representation of Plate 1 of ISGS Bulletin 100.
When the dataset was stored as a coverage it was checked for complete chain-node topology (no dangling arcs, except where appropriate), boundary values appropriate for map projection and map units, and appropriate "fuzzy" tolerances. There are no known arc attribute values outside the appropriate value domains.
Are there legal restrictions on access or use of the data?
- Access_Constraints:
- ISGS information must be obtained directly from the ISGS or from an authorized distributor. Be aware that ISGS information obtained from an unauthorized third party may have been altered subsequent to original distribution, or may no longer be current.
Any access to these data, Web sites, computer systems, electronic services, and electronic networks is governed by University and campus policies, in particular, but not limited to, the Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign, the ISGS Terms of Use document available at the ISGS Web site, and the University of Illinois Web Privacy Notice.
Links to these are provided in the Cross References section.
- Use_Constraints:
- ISGS information is the property of and copyrighted by the Board of Trustees of the University of Illinois with all rights reserved. University copyright policy is stated in the General Rules Concerning University Organization and Procedure, Article III, Section 4. A link is provided in the Cross References section.
Individuals or entities may make fair use of copyrighted ISGS material, such as reproducing a single figure or table, or using a brief text quotation, without obtaining formal permission, but in all cases the Illinois State Geological Survey must be credited as the source of the material. To reproduce ISGS information beyond the fair use standard, permission must be obtained from the ISGS Information Office, 615 East Peabody Drive, Champaign, Illinois 61820, 217-333-4747, isgs@isgs.illinois.edu. License fees and a license agreement may be required, depending on the proposed usage.
Any use of these data is governed by University and campus policies, in particular, but not limited to, the Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign, the ISGS Terms of Use document available at the ISGS Web site, and the University of Illinois Web Privacy Notice. Links to these are provided in the Cross References section.
Map information is to be used at a scientifically and cartographically appropriate scale, that is, at a scale no greater than indicated on the map or as described in the documentation of the map or map data. Map information is not appropriate for, and is not to be used as, a geodetic, legal, or engineering base. Map information has no legal basis in the definition of boundaries or property lines and is not intended as a substitute for surveyed locations such as can be determined by a registered Public Land Surveyor.
The data do not replace the need for detailed site-specific studies.
217-333-4747 (voice)
isgs@isgs.illinois.edu
Refer to the Legal Notices of Terms and Conditions of the University of Illinois Web Privacy Policy (there is a link in the Cross References section) for policy statements regarding the following:Disclaimer of Liability Disclaimer of Warranties and Accuracy of Data Disclaimer of Endorsement Disclaimer for External Links Disclaimer of Duty to Continue Provision of Data Security Choice of Law
By obtaining these data you agree to the provisions of the University of Illinois Web Privacy Policy, regardless of the manner in which the information was obtained.
The data are intended for use with GIS software. The ISGS uses ESRI ArcGIS software, however, ESRI formats can be imported into many different GIS software packages. It is expected that customers who obtain these data have the technical expertise to use GIS software. The ISGS does not provide software support of any kind.
Illinois Natural Resources Geospatial Data Clearinghouse
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