Metadata: Identification_Information: Citation: Citation_Information: Originator: Rhea, Susan Publication_Date: 1997 Title: Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: depth to magnetic rocks Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 97-0681 Publication_Information: Publication_Place: Denver Publisher: U.S. Geological Survey Online_Linkage: Description: Abstract: The structure of and depth to the floor of the Mississippi Valley and Rough Creel Grabens and surrounding regions were interpreted from aeromagnetic data. This cover contains the depth contours for the region within this study area and was clipped from the larger cover. This cover was not plotted in the Wabash Valley map series, but is included for those users who are interested in comparing the depth to basement from geologic data (bcontours and bfaults) to the depth to magnetic rocks (usually basement) from geophysical data. Depth units in this cover are kilometers below sea level, whereas depth units in bcontours are in thousands of feet below sea level. Purpose: The data was generated to help in understanding the seismotectonic hazards in the vicinity of the lower Wabash Valley. This data complements similar data collected in the vicinity of New Madrid, MO (US Geological Survey Open-File Report 95-0574, available via ftp at ) Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1990 Ending_Date: 1995 Currentness_Reference: Hildenbrand publication date Status: Progress: complete Maintenance_and_Update_Frequency: none planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -92.92391205 East_Bounding_Coordinate: -84.94763184 North_Bounding_Coordinate: 38.93841934 South_Bounding_Coordinate: 33.77402115 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: magnetic basement Place: Place_Keyword_Thesaurus: None Place_Keyword: Wabash Valley Access_Constraints: none Use_Constraints: none Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Susan Rhea Contact_Organization: US Geological Survey Contact_Position: Geophysicist Contact_Address: Address_Type: mailing address Address: MS966, Box 25046, Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-273-8639 Contact_Facsimile_Telephone: 303-273-8600 Contact_Electronic_Mail_Address: rhea@usgs.gov Contact_Instructions: email is the best way to make contact Data_Set_Credit: Hildenbrand Native_Data_Set_Environment: SunOS, 5.5.1, sun4u UNIX, ARC/INFO version 7.1.1 Cross_Reference: Citation_Information: Originator: Rhea, Susan, and Wheeler, R.L. Publication_Date: 1995 Title: Map showing synopsis of seismotectonic features in the the vicinity of New Madrid, Missouri Series_Information: Series_Name: US Geological Survey Miscellaneous Investigations Map Issue_Identification: I-2521 Publication_Information: Publication_Place: Denver, CO Publisher: US Geological Survey Other_Citation_Details: scale 1:250,000 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Original data from author has been altered for graphic presentation; specifically, 'weedtol' (distance betweeen vertices defining a line) is smaller than in the original data so that smoother lines are drawn. Logical_Consistency_Report: Chain-node topology present. Positional_Accuracy: Horizontal_Positional_Accuracy: Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 10 km Horizontal_Positional_Accuracy_Explanation: Resolution as reported Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Hildenbrand, T.G., and Hendricks, J.D. Publication_Date: 1995 Title: Geophysical setting of the Reelfoot Rift and relations between rift structures and the New Madrid seismic zone, in Shedlock, K.M., and Johnston, A.C., eds., Investigations of the New Madrid seismic zone Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: PP-1538, Capter E Publication_Information: Publication_Place: Denver, CO Publisher: US Geological Survey Other_Citation_Details: chapter E, 30 p Source_Scale_Denominator: 500,000 Type_of_Source_Media: electronic Source_Contribution: authors sent electronic files of line locations with depth attributes Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1990 Ending_Date: 1995 Source_Currentness_Reference: Process_Step: Process_Description: Coordinate and depth records were received via email from Hildenbrand and converted to arc/info format by Rhea. Resulting arcs were smoothed by changing weed tolerance and using generalize and spline commands. Replication from original data probably not possible, although close approximations should be realizable. Arcs have Hildenbrand's original depth to magnetic basement values, determined from extensive analysis and modeling. Rhea converted the arc coverage to a polygon coverage so that depth bands could be shaded. Depth values intermediate to the adjacent contour lines were added by Rhea . Process_Date: 19920724 Process_Time: 1509 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 31 SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 110 SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 32 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Geographic_Coordinate_Units: Decimal Degrees Geodetic_Model: Horizontal_Datum_Name: Unknown Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: MAGDEP.PAT Entity_Type_Definition: polygon labels with values between adjacent lines Entity_Type_Definition_Source: Rhea Attribute: Attribute_Label: DEPTH Attribute_Definition: depth intermediate to adjacent depth contours Attribute_Definition_Source: Rhea Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: Range_Domain_Maximum: Entity_Type: Entity_Type_Label: MAGDEP.AAT Entity_Type_Definition: symbol codes and value of depth contour Entity_Type_Definition_Source: Hildenbrand Attribute: Attribute_Label: CODE Attribute_Definition: symbol used to plot map Attribute_Definition_Source: Rhea Attribute_Domain_Values: Codeset_Domain: Codeset_Name: inkcolor.lin Codeset_Source: Computer Graphics Lab US Geological Survey Geologic Hazards Team Golden, CO Attribute: Attribute_Label: DEPTH Attribute_Definition: value of depth contour, kilometers below sea level Attribute_Definition_Source: Hildenbrand Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: Range_Domain_Maximum: Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Susan Rhea Contact_Organization: US Geological Survey Contact_Position: Geophysicist Contact_Address: Address_Type: mailing address Address: USGS Mail Stop 966 Box 25046, Federal Center City: Denver State_or_Province: CO Postal_Code: 80225-0046 Country: USA Contact_Voice_Telephone: 303-273-8639 Contact_Facsimile_Telephone: 303-273-8600 Contact_Electronic_Mail_Address: rhea@usgs.gov Contact_Instructions: Email is the best way to make contact. Resource_Description: USGS Open-File Report 97-0681 Distribution_Liability: This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature. Any use of trade names is for descriptive purposes only and does not imply endorsement by the USGS. Technical_Prerequisites: ARC/INFO version 7.0.3 or later or ArcView 3.0 or later Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE Format_Version_Number: 7.0.3 Format_Information_Content: Each coverage contains isoseismal data for one event (two for i187609) File_Decompression_Technique: Files may be compressed with gzip; use gzip -d or gunzip to uncompress. Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: ftp://greenwood.cr.usgs.gov/pub/open-file-reports/ofr-97-0681/e00_files/magdep.e00 Online_Computer_and_Operating_System: Data General AViiON 6220 running DG/UX 5.4R3.10 (Unix) Fees: none Metadata_Reference_Information: Metadata_Date: 19980506 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Susan Rhea Contact_Organization: US Geological Survey Contact_Position: Geophysicist Contact_Address: Address_Type: mailing address Address: MS966, Box 25046, Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-273-8639 Contact_Facsimile_Telephone: 303-273-8600 Contact_Electronic_Mail_Address: rhea@usgs.gov Contact_Instructions: email is the best way to make contact Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: 19940608