Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Geophysical lineaments

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Frequently anticipated questions:

What does this data set describe?

Title:
Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Geophysical lineaments
Abstract:
Lines in this cover show lineaments or boundaries of large lineaments interpreted from gravity and magnetic data. These lineaments are thought to reflect structures in the crust that may be related to earthquake generation or control of earthquake location.
The broad Paducah gravity lineament trends southeast across the SW corner of the map area. Hildenbrand and others (1996) have interpreted that the lineament represents numerous upper-crustal mafic intrustions. Within and west of the map area, small earthquakes are aligned with the NE edge of the lineament and their abundance decreases abruptly NE across the edge.
The Commerce geophysical lineament trends NE across the map area. Langenheim and Hildenbrand (1997) attribute the lineament to a mafic dike swarm of unknown age. Topographic lineaments, Quaternary offsets on mapped faults, igneous intrusions, and a few earthquakes align along the lineament.
The south-central magnetic lineament trends NW across the center of the map area and extends far beyond the map area in both directions. Hildenbrand and others (1996) interpret the lineament as a 40 km wide zone of high susceptibility intrusions of intermediate composition and probable Pc age. Heigold and Kolata (1993)suggest that the lineament may represent Precambrian Proterozoic terrane boundary. Seismicity south of the lineament (Reelfoot Rift) is greater than seismicity north of the boundary (Wabash Valley), but this boundary is located further to the south and trends more northerly than the south- central magnetic lineament. Present evidence implies that this lineament is the least likely to be causally related to modern seismicity.
  1. How might this data set be cited?
    Rhea, Susan, 1997, Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Geophysical lineaments: U.S. Geological Survey Open-File Report 97-0681, U.S. Geological Survey, Denver,CO.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -89
    East_Bounding_Coordinate: -87
    North_Bounding_Coordinate: 39
    South_Bounding_Coordinate: 36.5
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 1995
    Ending_Date: 1997
    Currentness_Reference:
    cover contains locations of all published lineaments
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: map
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • Point (4)
      • String (14)
      • GT-polygon composed of chains (5)
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest .1. Longitudes are given to the nearest .1. Latitude and longitude values are specified in Decimal Degrees. The horizontal datum used is Unknown.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.
  7. How does the data set describe geographic features?
    LINEAMENT.PAT
    boundaries of large lineaments (Source: Rhea)
    NAME
    name of geophysical lineament (Source: Hildenbrand)
    ValueDefinition
    (blank) 
    Paducah grav line 
    S Central mag linename of geophysical feature
    LINEAMENT.AAT
    locations of boundaries or locations of geophysical lineaments (Source: Rhea)
    SYMBOL
    symbol used to draw feature on map (Source: Rhea)
    ValueDefinition
    0 
    50 
    51 
    Formal codeset
    Codeset Name:wabash.lin
    Codeset Source:Rhea
    NAME
    name of lineament (Source: Hildenbrand)
    ValueDefinition
    (blank) 
    Commeerce geophys lin 
    Paducah grav line 
    s central mag linename of geophysical feature

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Rhea, Susan
  2. Who also contributed to the data set?
    Hildenbrand
  3. To whom should users address questions about the data?
    Susan Rhea
    US Geological Survey
    Geophysicist
    MS966, Box 25046, Federal Center
    Denver, CO
    USA

    303-273-8639 (voice)
    303-273-8600 (FAX)
    rhea@usgs.gov
    Contact_Instructions: email is the best way to make contact

Why was the data set created?

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 at http://pubs.usgs.gov/of/1995/0574/

How was the data set created?

  1. From what previous works were the data drawn?
    (source 1 of 6)
    Hildenbrand, T.G., 1995, written communication, electronic.

    (source 2 of 6)
    Heigold, P.C., and Kolata, D.R., 1993, Proterozoic crustal boundary in the southern part of the Illinois Basin: Tectonophysics 217, Ellsevier Press.

    Other_Citation_Details: p 307-319
    (source 3 of 6)
    Hildenbrand, T.G., and Keller, G.R., 1983, Magnetic and gravity features of western KY - their geologic significance: U.S. Geological Survey Open-File Report OFR 83-164, US Geological Survey.

    Other_Citation_Details: 12 p, 4 maps
    (source 4 of 6)
    Hildenbrand, T.G., and Hendricks, J.D., 1995, 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: U.S. Geological Survey Professional Paper PP 1538, Chapter E, US Geological Survey.

    Other_Citation_Details: chapter E, 30 p.
    (source 5 of 6)
    Hildenbrand, T.G., Kucks, R.P., and Heigold, P.C., 1996, Magnetic and gravity study of the Paducah 1 degree X 2 degree quadgrangle, IL, IN, KY, MO: U.S. Geological Survey Bulletin Bulletin 2150-C, U.S. Geological Survey.

    Other_Citation_Details: 22 p
    (source 6 of 6)
    Langenheim, V.E., and Hildenbrand, T.G., 1997, Commerce geophysical lineament - Its source, geometry, and relation to the Reelfoot Rift and New Madrid seismic zone: Geological Society of America Bulletin v. 109, Geological Society of America.

    Other_Citation_Details: p.580-595
    Source_Contribution: coordinates of lines from Hildenbrand
  2. How were the data generated, processed, and modified?
    Date: 29-May-1997 (process 1 of 2)
    Coordinates of lines were received via ftp from Hildenbrand and coverted to arc/info coverage. Lines were labeled for identification on the paper map, and annotation was added. lineament was clipped from lineament_all to the project boundary.
    Date: 06-May-1998 (process 2 of 2)
    Creation of original metadata record Person who carried out this activity:
    Susan Rhea
    US Geological Survey
    Geophysicist
    MS966, Box 25046, Federal Center
    Denver, CO
    USA

    303-273-8639 (voice)
    303-273-8600 (FAX)
    rhea@usgs.gov
    Contact_Instructions: email is the best way to make contact
  3. What similar or related data should the user be aware of?
    Wheeler, R.L., Rhea, Susan, Diehl, S.F., Drahovzal, J.A., Bear, G.W., and Sargent, M.L., 1997, Map showing faults, igneous rocks, and geophysical and neotectonic features in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky: U.S. Geological Survey Miscellaneous Investigations Series Map I-2583-D, U.S. Geological Survey, Denver.

    Other_Citation_Details: pamphlet accompanies map

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    The boundaries of these structures are not well defined. Gravity and magnetic data typically result from deep structures, and are very ambiguous. Lines are drawn between large changes, but the position of rock types causing variation is only loosely defined.
  2. How accurate are the geographic locations?
    see Abstract
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    all published data included
  5. How consistent are the relationships among the observations, including topology?
    Polygon and chain-node topology present.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: none
Use_Constraints: none
  1. Who distributes the data set? (Distributor 1 of 1)
    Susan Rhea
    US Geological Survey
    Geophysicist
    USGS Mail Stop 966
    Box 25046, Federal Center
    Denver, CO
    USA

    303-273-8639 (voice)
    303-273-8600 (FAX)
    rhea@usgs.gov
    Contact_Instructions: Email is the best way to make contact.
  2. What's the catalog number I need to order this data set? USGS Open-File Report 97-0681
  3. What legal disclaimers am I supposed to read?
    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.
  4. How can I download or order the data?
  5. What hardware or software do I need in order to use the data set?
    ARC/INFO version 7.0.3 or later or ArcView 3.0 or later

Who wrote the metadata?

Dates:
Last modified: 10-Jun-2016
Metadata author:
Peter N Schweitzer
USGS Midwest Area
Collection manager, USGS Geoscience Data Clearinghouse, http://geo-nsdi.er.usgs.gov/
Mail Stop 954
12201 Sunrise Valley Dr
Reston, VA
USA

703-648-6533 (voice)
703-648-6252 (FAX)
pschweitzer@usgs.gov
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://geo-nsdi.er.usgs.gov/metadata/open-file/97-681/lineament.faq.html>
Generated by mp version 2.9.48 on Tue Jul 03 20:06:57 2018