Identification_Information: Citation: Citation_Information: Originator: Van Arsdale, Roy Publication_Date: 2004 Title: Surficial geologic map of the Ellendale quadrangle, Shelby County, Tennessee Edition: version 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Scientific Investigations Map Issue_Identification: Scientific Investigations Map 2836 Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/sim/2004/2836 Description: Abstract: The depiction of geology on this map is designed to aid in urban planning and analysis of potential damage in the event of strong earthquake motion. The geologic map by itself does not analyze potential earthquake damage, but is designed to be used by seismologists who perform such analyses. The nature of geologic materials to a degree determines the severity of damage to infrastructure sustained during a strong earthquake. Purpose: This map is one of a series of earthquake hazard maps designed for use as part of the Memphis and Shelby County Seismic Hazard Mapping Project. Because Memphis lies about 50 km southeast of the New Madrid Seismic Zone, it is within a zone of high seismic risk. Earthquake hazards mapping is a multidisciplinary, multi-institutional process involving the creation of surface and subsurface geologic maps and databases, and maps of ground motion amplification, deterministic and probabilistic ground motions, and liquefaction hazard. These maps, which derive in part from geologic maps such as this one, will aid in quantifying earthquake risk to Memphis and will be used by decision makers. This work is part of the Earthquake Hazards Program of the United States Geological Survey in the Central and Eastern United States (CEUS). Damaging earthquakes in the CEUS are low-probability, high-impact events. In the CEUS region, energy waves of major earthquakes transmit large energy levels over large regions, and can cause widespread damage. Exacerbating this hazard is aging building stock not designed to withstand strong ground shaking. CEUS earthquakes may affect major population centers such as Memphis and St. Louis, as well as smaller cities in seven States. Supplemental_Information: Coverages included in this geospatial database: elgeolt: polygon coverage of geologic units and contacts elcrosst: line coverage of cross section Georegistered images included in this geospatial database: elr.tif (topography, planimetry, and drainages) elr.tfw el_wr.tif (open water) el_wr.tfw Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 2000 Ending_Date: 2004 Currentness_Reference: publication date Status: Progress: complete Maintenance_and_Update_Frequency: none planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -89.875 East_Bounding_Coordinate: -89.75 North_Bounding_Coordinate: 35.25 South_Bounding_Coordinate: 35.125 Keywords: Theme: Theme_Keyword_Thesaurus: American Geological Institute Glossary of Geology Theme_Keyword: surficial geology Theme_Keyword: loess Theme_Keyword: Peoria Loess Theme_Keyword: Lafayette Gravel Theme_Keyword: alluvium Theme_Keyword: artificial fill Theme_Keyword: earthquake hazard Theme_Keyword: seismic risk Theme_Keyword: metropolitan area Theme_Keyword: urban geology Theme_Keyword: environmental geology Theme_Keyword: liquefaction Theme_Keyword: paleoliquefaction Theme_Keyword: ground shaking Theme_Keyword: gravel Theme_Keyword: sand Theme_Keyword: drillers logs Theme_Keyword: drillers' logs Theme_Keyword: borehole Theme_Keyword: ground water Theme_Keyword: cross section Theme_Keyword: silty Theme_Keyword: radiocarbon Theme_Keyword: Wisconsinan Theme_Keyword: mastodon Theme_Keyword: late glacial Place: Place_Keyword_Thesaurus: Board of Geographic Names Place_Keyword: Nonconnah Creek Place_Keyword: Mississippi River Valley Place_Keyword: Shelby County, Tennessee Place_Keyword: New Madrid, Missouri Place_Keyword: mid-continent Place_Keyword: Memphis, Tennessee Place_Keyword: Ellendale quadrangle Access_Constraints: none Use_Constraints: None. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Gomberg, Joan S Contact_Organization: U.S. Geological Survey Contact_Position: seismologist Contact_Address: Address_Type: mailing and physical address Address: 3876 Central Avenue, Suite 2 City: Memphis State_or_Province: TN Postal_Code: 38152-3050 Country: USA Contact_Voice_Telephone: (901)678-4858 Contact_Facsimile_Telephone: (901)678-4734 Contact_Electronic_Mail_Address: gomberg@usgs.gov Hours_of_Service: 0800 - 1630 Eastern Standard Time M-F Contact_Instructions: E-mail is preferred Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/sim/2004/2836/2836.pdf Browse_Graphic_File_Description: graphic representation of map layout Browse_Graphic_File_Type: PDF Native_Data_Set_Environment: Microsoft Windows NT Version 4.0 (Build 1381) Service Pack 6 ESRI ArcCatalog 8.2.0.700 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The database consists of newly generated data that were compiled on mylar and then digitized in ARC/INFO. This map was thoroughly reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature. Logical_Consistency_Report: Map elements were visually checked by the authors and editor for overshoots, undershoots, duplicate features, polygon attributes, and other errors. Automated (ARC/INFO) routines were also used to check the databases for polygon label errors and dangling arcs. The coverages were cleaned in ARC/INFO to ensure logical consistency that is topologically clean. The map was reviewed by other geologists for consistency with basic geologic principles and general conformity to USGS mapping standards. Completeness_Report: This dataset is complete and includes the spatial coverages pertaining to the geologic map. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: 50-200 m Lineage: Process_Step: Process_Description: Mapping was based on field observations, analysis of color aerial photographs (scale 1:24,000, flown in 1997), topography, and drill-hole data. The authors delineated geologic units on aerial photographs, supplemented by field inspection. The linework was transferred to base maps by inspection, and digitized manually, and the data were then digitally registered to a digital version of the base map in ArcInfo. Grain sizes were estimated by eye in the field using a comparative chart that uses nomenclature of the modified Wentworth grade scale (American Geological Institute, 1982). Geologic cross sections show the subsurface thickness of the units of interest. The cross sections were constructed as follows: depths to the boundaries between units were obtained from drill hole data in the Shelby County Subsurface Database of the Ground Water Institute (GWI), University of Memphis (http://gwidc.gwi.memphis.edu/website/introduction). Depths below ground surface to boundaries between units were determined by hydrologists and geologists who interpreted drillers' logs and borehole electrical logs. This was done before the authors of this geologic map did the geologic mapping. Process_Date: 2000-2004 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Transverse mercator Transverse_Mercator Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -89.812500 Latitude_of_Projection_Origin: 0.000000 False_Easting: 0.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000032 Ordinate_Resolution: 0.000032 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.400000 Denominator_of_Flattening_Ratio: 294.978698 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: The data are supplied in ARC/INFO export format and ArcView shapefile format. >Attribution of user-defined item GEOLOGY in elgeolt.pat: >Qa >Qal >Ql >Qt >af >Attribution of user-defined item LINETYPE in elgeolt.aat: >contact, relatively certain >map boundary Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: Central Publications Group Address: MS 902, Box 25046 Address: Denver Federal Center City: Denver State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: (888)ASK-USGS Contact_Electronic_Mail_Address: webmaster@geology.cr.usgs.gov Distribution_Liability: The U.S. Geological Survey (USGS) provides these geographic data "as is". The USGS makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. The USGS further makes no warranties, either expressed or implied, as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers at the USGS, no warranty, expressed or implied, is made by the USGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ArcInfo interchange file and ArcInfo shapefile formats Format_Version_Number: ArcInfo version 8.3 File_Decompression_Technique: .tar.gz - UNIX gzip-compressed TAR file - use GNU zip and TAR to extract .ZIP - Windows ZIP archive - use Winzip, PKZip, or similar to extract Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: Fees: None Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S.Geological Survey Contact_Address: Address_Type: mailing address Address: USGS Information Services Address: Box 25286 City: Denver State_or_Province: CO Postal_Code: 80225 Country: United States Contact_Voice_Telephone: 1-888-ASK-USGS Resource_Description: Scientific Investigations Map 2836 (plot-on-demand) Distribution_Liability: none Standard_Order_Process: Non-digital_Form: Available as one printed sheet. Order from USGS at the address listed above or see for more ordering information. Fees: For current prices please see Metadata_Reference_Information: Metadata_Date: 20040715 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Tucker, Kathy Contact_Organization: Center for Earthquake Research and Information (CERI) Contact_Address: Address_Type: mailing and physical address Address: Center for Earthquake Research and Information (CERI), University of Memphis City: Memphis State_or_Province: TN Postal_Code: 38152-3050 Contact_Voice_Telephone: (901)678-4814 Contact_Facsimile_Telephone: (901)678-473 Contact_Electronic_Mail_Address: tucker@ceri.memphis.edu Hours_of_Service: 0800 - 1630 Eastern Standard Time M-F Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: none Metadata_Use_Constraints: none