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: <http://pubs.usgs.gov/sim/2004/2836/>
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 <http://rmmcweb.cr.usgs.gov/pub/mod/order.html/> for more
ordering information.
Fees:
For current prices please see
<http://rmmcweb.cr.usgs.gov/public/mod/order.html/>
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