Online link | https://geo-nsdi.er.usgs.gov/metadata/open-file/97-681/liq95surv.faq.html |
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Description | Over several summer field seasons from 1990 through 1994, several workers searched ditches and river banks for evidence of prehistoric earthquake liquefaction. They found numerous banks with shaking-induced sandblows and the dikes that fed them. "liq94sur |
Originators | Rhea, Susan |
Publication | U.S. Geological Survey Open-File Report 97-0681 |
>ARC/INFO coverage Description of coverage > >2x2grat graticule for the map >2x2grattic point cover of all the .1250 interval tics in the 2x2grat area >axgrav axial gravity anomaly (Langenheim, 1995) >basehyd selected hydrography, selected on the basis of significant ground-shaking or liquefaction potential >bhlin_24k Bootheel Lineament as observed on low-altitude photos and transferred to 1:24,000 scale topographic maps (Schweig and others 1992) >bhlin_ls Bootheel Lineament as observed on landsat images >cities selected cities >cnty state and county borders in the map area >enrgcen locations of probable subsurface ruptures of the 1811-12 earthquakes, as defined by sandblow distribution (Obermeier, 1989) >epri damaging earthquakes (moment magnitude ? 5.0) since 1811-12 as defined by EPRI (Johnston, 1994) >eqk_slu earthquakes located by the St. Louis University from July 1974 to December 1992, Taylor and others (1991) >faults locations of faults identified by geologic observation >gpspts locations of Global Positioning System monuments >gravstr structures identified from gravity-field data (Langenheim,1995) >gwanom locations of ground-water anomalies (Brahana and Mesko, 1994) >intcom intrusive complexes defined by aeromagnetic studies (Hildenbrand and Hendricks, 1995) >hrvpdeep P-velocity contours for depths 5 - 14 km (Al-Shukri and Mitchell, 1987) >hrvpshal P-velocity contours for depths 0 - 5 km (Al-Shukri and Mitchell, 1987) >landslide landslides along the Chickasaw Bluffs, mapped by Jibson and Keefer (1988) at 1:62,500 scale >magdep depth to magnetic basement (Hildenbrand and Hendricks, 1995) >misspoly polygon coverage of the Mississippi River extracted from basehyd >miscenters Fischer and Schumm's (1995) locations of historical centerlines >misshores Fischer and Schumm's (1995) locations of historical shorelines of the Mississippi River from 1765 to 1960 >mtstr Reelfoot Graben structures interpreted from magnetotelluric data >pzcon paleozoic surface depth contours from Dart (1995) >pzconpts control points for defining the paleozoic surface from Dart (1995) >pzsub subcrop contacts on the paleozoic surface from Dart (1995) >qd24k polygons of the 1:24000 scale topographic maps in the area >railrds railroads on the 100k DLG's >rds class 1 and 2 roads (major 4-lane and principle 2-lane roads) >reflstr structures identified in seismic reflection research >rivanom river anomalies throughout the New Madrid region identified by Fischer and Schumm (1995) >sblows outlines of Obermeier's (1989) definitions of areas covered by greater than 1% and greater than 25% sandblows from the 1811-12 earthquakes >selwell selected wells from Dart (1992) >sfcstr significant structures visible at the surface in the vicinity of New Madrid >seissta locations of seismograph stations that have operated in the New Madrid region since July 1974 >states arcs from cnty with bndytype = 1; see cnty for description >stresspts stress orientations either from borehole breakouts or earthquake focal mechanism solutions updated in Ellis (1994) >strmot strong motion seismometers >trench trenches examined for prehistoric earthquakes and a report has been published >well wells from Dart (1992) in the map area. See selwell for wells used in MF-2264
http://pubs.usgs.gov/of/1995/ofr-95-0574/readme.txt
graticule for the map
Label | Definition |
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NEATCODE | Location of neat line |
Axial gravity anomaly
Label | Definition |
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GEO | type of data |
Axial gravity anomaly at specific locations (same attributes as polygon coverage AXGRAV.PAT)
Label | Definition |
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Selected hydrography, selected on the basis of significant ground-shaking or liquefaction potential. (Attributes are remnants of DLG base map)
Label | Definition |
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Bootheel Lineament as observed on low-altitude photos and transferred to 1:24,000 scale topographic maps (Schweig and others 1992)
Label | Definition |
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CODE | type of lineament |
selected cities
Label | Definition |
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NAME2 | Name of selected cities |
damaging earthquakes (moment magnitude ? 5.0) since 1811-12 as defined by EPRI (Johnston, 1994)
Label | Definition |
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YEAR | Year the damaging earthquake occurred |
MONTH | Month damaging earth quake occurred |
DAY | Day damaging earthquake occurred |
MAG | Magnitude of damaging earthquake |
Locations of faults identified by geologic observation
Label | Definition |
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CODE | plotting symbol |
REF | Reference for fault |
Locations of Global Positioning System monuments.
Label | Definition |
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ID | Identifying code |
AGENCY | Operator of GPS monument |
HEIGHT | Height (elevation) of GPS monument |
DECLIN | Declination of monument |
GEOG_LOC | Geographic location of monument |
LONG | Longitude of GPS monument location |
LAT | Latitude of GPS monument location |
PLOT | Plot symbol |
Structures identified from gravity-field data (Langenheim, 1995)
Label | Definition |
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GEO | geological name |
Structures identified from gravity-field data (Langenheim, 1995)
Label | Definition |
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GEO | Geolical name |
Structures identified from gravity-field data (Langenheim, 1995) (same attributes as polygon coverage GRAVSTR.PAT)
Label | Definition |
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P-velocity contours for depths 0-5 km (Al-Shukri and Mitchell, 1987)
Label | Definition |
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DEPTH | Depth identifier |
VELOC | Velocity of P-wave |
P-velocity contours for depths 5-14 km (Al-Shukri and Mitchell, 1987)
Label | Definition |
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DEPTH | Depth identifier |
VELOC | Velocity of P-wave |
depth to magnetic basement (Hildenbrand and Hendricks, 1995)
Label | Definition |
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DEPTH | Depth to magnetic basement |
depth to magnetic basement (Hildenbrand and Hendricks, 1995)
Label | Definition |
---|---|
DEPTH | Depth to magnetic basement |
depth to magnetic basement (Hildenbrand and Hendricks, 1995) (same attributes as polygon coverage MAGDEP.PAT)
Label | Definition |
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Structures identified from magnetic-field data
Label | Definition |
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GEO | Geological structure |
NAME | Name of structure (if any) |
Structures identified from magnetic-field data
Label | Definition |
---|---|
GEO | Geological structure |
Structures identified from magnetic-field data (same attributes as polygon coverage MAGSTR.PAT)
Label | Definition |
---|
Fischer and Schumm's (1995) locations of historical centerlines of the Mississippi River from 1765 to 1960
Label | Definition |
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YEAR | year for which location was determined |
Fischer and Schumm's (1995) locations of historical shorelines of the Mississippi River from 1765 to 1960
Label | Definition |
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YEAR | Year for which location was determined |
polygon coverage of the Mississippi River extracted from BASEHYD.AAT (same attributes as BASEHYD.AAT)
Label | Definition |
---|
Reelfoot Graben structures interpreted from magnetotelluric data (Stanley and Rodriguez, 1992)
Label | Definition |
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NAME | Name of structures |
paleozoic surface depth contours from Dart (1995) arc attributes
Label | Definition |
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DEPTH | Depth to paleozoic surface |
Control points for defining the paleozoic surface from Dart (1995)
Label | Definition |
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DEP | Depth |
X-COORD | X-coordinate |
Y-COORD | Y-coordinate |
polygons of the 1:24000 scale topographic maps in the area
Label | Definition |
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LONG | Longtitude at center of quadrangle |
LAT | Latitude of center of quadrangle |
NAME | Qaudrangle name |
STATE | State the quadrangle mainly covers |
Points at the center of the 1:24000 scale topographic maps in the area (same attributes as polygon coverage QD24K.PAT)
Label | Definition |
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Railroads on the 100k DLG's (Attributes are remnants of DLG base map)
Label | Definition |
---|
river anomalies throughout the New Madrid region identified by Fischer and Schumm (1995)
Label | Definition |
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Locations of siesmograph stations that have operated in the New Madrid region since July 1974.
Label | Definition |
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LONG | Longitude of station |
LAT | Latitude of station |
STA | Station name |
START | Start date of station operating |
STOP | Stop date of station operating |
Selected wells from Dart (1992) (Described in Dart (1992) and include, for example, location, owner, id, depth to various formations, and thickness of various formations)
Label | Definition |
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stress orientations either from borehole breakouts or earthquake focal mechanism solutions updated in Ellis (1994)
Label | Definition |
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DIR | Direction of stress symbol |
TYPE | Type |
X-COORD | X-coordinate |
Y-COORD | Y-coordinate |