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Surficial Geologic map of the Greater Omaha Area, Nebraska and Iowa

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Ralph R. Shroba; Theodore R. Brandt; Jeffrey C. Blossom
Publication_Date: 2001
Title: Surficial Geologic map of the Greater Omaha Area, Nebraska and Iowa
Edition: 1.0
Geospatial_Data_Presentation_Form: Map
Series_Information:
Series_Name: U.S. Geological Survey Miscellaneous Field Studies Map
Issue_Identification: MF-2391
Publication_Information:
Publication_Place: Denver, CO, USA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Online_Linkage: http://pubs.usgs.gov/mf/2001/mf-2391/
Description:
Abstract:
This map provides geologic information for land-use decisions. Geologic mapping, in support of the USGS Omaha-Kansas City Geologic Mapping Project, shows the spatial distribution of artificial-fill, alluvial, eolian, and glacial deposits and bedrock in and near Omaha, Nebraska. Artificial fill deposits are mapped chiefly beneath commercial structures, segments of interstate highways and other major highways, railroad tracks, airport runways, and military facilities, and in landfills and earth fills. Alluvial deposits are mapped beneath flood plains, in stream terraces, and on hill slopes. They include flood-plain and stream-channel alluvium, sheetwash alluvium, and undivided sheetwash alluvium and stream alluvium. Wind-deposited loess forms sheets that mantle inter-stream areas and late Wisconsin terrace alluvium. Peoria Loess is younger of the two loess sheets and covers much of the inter-stream area in the map area. Loveland Loess is older and is exposed in a few small areas in the eastern part of the map area. Glacial deposits are chiefly heterogeneous, ice-deposited, clayey material (till) and minor interstratified stream-deposited sand and gravel. Except for small outcrops, glacial deposits are covered by eolian and alluvial deposits throughout most of the map area. Bedrock is locally exposed in natural exposures along the major streams and in quarries. It consists of Dakota Sandstone and chiefly limestone and shale of the Lansing and Kansas City Groups. Sand and gravel in flood plain and stream-channel alluvium in the Platte River valley are used mainly for concrete aggregate. Limestone of the Lansing and Kansas City Groups is used for road-surfacing material, rip rap, and fill material. Surficial deposits are mapped where they are estimated to be at least 1 m thick. Most of the surficial deposits are poorly exposed. The surficial deposits were locally observed in foundation excavations, road cuts, and other exposures in 1995 and 1996. Thin, discontinuous sheetwash alluvium (Qsw) and small artificial-fill deposits (af) were not mapped. Small outcrops of Loveland Loess, till, Dakota Sandstone, and limestone outcrops of the Lansing and Kansas City Groups that are too small to map are shown as symbols. Mapping in and near Omaha is modified from that of Miller (1964, plates 2 and 3 at 1:24,000 scale). Mapping in the rest of the map area is based primarily on interpretation of 1:15,840- and 1:20,000-scale county soil maps (Bartlett, 1975; Borchers and others, 1984; Branham, 1989; Nixon, 1982) and interpretation of aerial photography, supplemented by examination of artificial and natural exposures. The aerial photography includes: 1:40,000-scale, black-and-white, aerial photographs taken in April and May 1990 and in March and April 1993, and also 1:60,000-scale, color infrared, aerial photographs taken in May 1981 and April 1982. Age assignments for surficial deposits are based in part on soil development. Soil-horizon designations and textural terms, such as silt loam and clay loam, are those of the Soil Survey Staff (1975). Grain-size ranges given for surficial deposits are estimates that are based on the modified Wentworth scale (American Geological Institute, 1982). Dry matrix colors of the surficial deposits were determined by comparison with Munsell Soil Color Charts (Munsell Color, 1973). In general, colors of the surficial deposits are similar to those of the bedrock and other materials from which the deposits were derived. Unweathered to slightly weathered surficial deposits observed in the map area commonly range from gray (5Y 6/1) to very pale brown (10YR 8/4). In this report, the terms "alluvium" and "alluvial" refer to surficial material transported by running water confined to channels (stream alluvium) as well as material transported by running water not confined to channels (sheetwash alluvium). The term "colluvial" here refers to surficial material transported down slopes chiefly by mass-movement (gravity-driven) processes, such as creep. All of the radiocarbon and thermoluminescence ages in this report are uncalibrated. The thickness and grain-size ranges of surficial map units are based chiefly on interpretation of approximately 300 unpublished drill-hole logs and approximately 30 water-well logs on file with the Conservation and Survey Division, University of Nebraska-Lincoln, and test-hole data summarized by Burchett (1965) and Burchett and Smith (1989a, 1989b). Metric units are used in this report. (See text for complete bibliographic references.) Coverages included in this geospatial database: >ompnt100 coverage: Contains geologic points for sites classified as bedrock, Loveland Loess, or Till. >ombdy100 coverage: Contains lines defining state and county boundaries derived from USGS DLG data. >omtrn100 coverage: Contains lines defining linear transportation features (highways and roads) derived from USGS DLG data. >omhyp100 coverage: Contains lines defining hypsographic features derived from USGS DLG data. >omhyd100 coverage: Contains polygons and lines defining hydrographic features derived from USGS DLG data. >ommea100 coverage: Contains lines defining scarps bordering former channels of the Missouri River.
Purpose:
Not Available
Supplemental_Information:
Not Available
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -96.25
East_Bounding_Coordinate: -95.875
North_Bounding_Coordinate: 41.375
South_Bounding_Coordinate: 41.0
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > HUMAN DIMENSIONS > BOUNDARIES > ADMINISTRATIVE DIVISIONS
Theme_Keyword: EARTH SCIENCE > HUMAN DIMENSIONS > BOUNDARIES > POLITICAL DIVISIONS
Theme_Keyword: EARTH SCIENCE > HUMAN DIMENSIONS > INFRASTRUCTURE > BUILDINGS
Theme_Keyword: EARTH SCIENCE > HUMAN DIMENSIONS > INFRASTRUCTURE > TRANSPORTATION
Theme_Keyword: EARTH SCIENCE > HUMAN DIMENSIONS > ENVIRONMENTAL GOVERNANCE/MANAGEMENT > LAND MANAGEMENT > LAND USE/LAND COVER CLASSIFICATION
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > HYDROPATTERN
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > RIVERS/STREAMS
Theme_Keyword: EARTH SCIENCE > LAND SURFACE > EROSION/SEDIMENTATION > SEDIMENTS
Theme_Keyword: EARTH SCIENCE > LAND SURFACE > EROSION/SEDIMENTATION > STRATIGRAPHIC SEQUENCE
Theme_Keyword: EARTH SCIENCE > LAND SURFACE > GEOMORPHOLOGY > EOLIAN LANDFORMS/PROCESSES
Theme_Keyword: EARTH SCIENCE > LAND SURFACE > GEOMORPHOLOGY > FLUVIAL LANDFORMS/PROCESSES
Theme_Keyword: EARTH SCIENCE > LAND SURFACE > GEOMORPHOLOGY > GLACIAL LANDFORMS/PROCESSES
Theme_Keyword: EARTH SCIENCE > LAND SURFACE > SOILS
Theme_Keyword: EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > CONTOURS
Theme_Keyword: EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > LANDFORMS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > AEOLIAN LANDFORMS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > FLUVIAL LANDFORMS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > GLACIAL LANDFORMS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > SEDIMENTARY ROCKS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > SEDIMENTS
Theme_Keyword: MAPS
Theme_Keyword: Geologic Maps
Theme_Keyword: Surficial Deposits
Theme_Keyword: Surficial Geology
Theme_Keyword: Surficial Geologic Maps
Theme_Keyword: Geology
Theme_Keyword: Peoria Loess
Theme_Keyword: Loveland Loess
Theme_Keyword: Glacial Deposits
Theme_Keyword: Till
Theme_Keyword: Artificial-fill Deposits
Theme_Keyword: Dakota Sandstone
Theme_Keyword: Kansas City Group
Theme_Keyword: Lansing Group
Theme_Keyword: Alluvial Deposits
Theme_Keyword: Missouri River
Theme_Keyword: Platte River
Theme_Keyword: Douglas County
Theme_Keyword: Sarpy County
Theme_Keyword: Cass County
Theme_Keyword: Pottawattamie County
Theme_Keyword: Mills County
Theme_Keyword: Conservation
Theme_Keyword: BOUNDARIES
Theme_Keyword: ELEVATION
Theme_Keyword: ENVIRONMENT
Theme_Keyword: GEOSCIENTIFIC INFORMATION
Theme_Keyword: IMAGERY/BASE MAPS/EARTH COVER
Theme_Keyword: INLAND WATERS
Theme_Keyword: PLANNING CADASTRE
Theme_Keyword: STRUCTURE
Theme_Keyword: TRANSPORTATION
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > IOWA
Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NEBRASKA > OMAHA
Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NEBRASKA
Access_Constraints: None
Use_Constraints:
None. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data. Although software enables the user to display images at various scales, map data in this report should not be used at scales greater than 1:100,000.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: RALPH R. SHROBA
Contact_Position: DIF AUTHOR
Contact_Position: TECHNICAL CONTACT
Contact_Position: INVESTIGATOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: U.S. Geological Survey
Address: Box 25046, MS 913
Address: Denver Federal Center
City: Denver
State_or_Province: CO
Postal_Code: 80225-0046
Country: USA
Contact_Voice_Telephone: 303-236-1292
Contact_Facsimile_Telephone: 303-236-0214
Contact_Electronic_Mail_Address: rshroba@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: http://pubs.usgs.gov/mf/2001/mf-2391/mf-2391.gif
Browse_Graphic_File_Description:
GIF Image of Map
Browse_Graphic_File_Type: GIF
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Not Available
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
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Spatial_Reference_Information:
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: DOI/USGS/GD/PUBS/CR > Central Region, Publications, Geology Division, U.S. Geological Survey, U.S. Department of the Interior
Contact_Person: U.S. GEOLOGICAL SURVEY CENTRAL PUBLICATIONS GROUP
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Denver Federal Center
Address: MS-902
Address: Box 25046
City: Denver
State_or_Province: CO
Postal_Code: 80225-0046
Country: USA
Contact_Voice_Telephone: (303) 236-5486
Resource_Description: USGS Miscellaneous Field Studies Map MF-2391
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ArcInfo Export
Format_Name: Shapefile
Transfer_Size: 90 MB
Transfer_Size: 90 MB
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://cpg.cr.usgs.gov/pub/publications.html
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://pubs.usgs.gov/mf/2001/mf-2391/mf-2391.pdf
Access_Instructions:
Map PDF file (8.7 MB)
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://pubs.usgs.gov/mf/2001/mf-2391/mf-2391texton...
Access_Instructions:
Text-only Map PDF file (236 KB) (This version of the report is accessible as defined in Section 508.)
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://pubs.usgs.gov/mf/2001/mf-2391/mf-2391.tar.g...
Access_Instructions:
Archived GIS files (not Section 508 accessible): TARRED and GZIPPED ArcInfo files, metadata, etc. (19 MB)
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://pubs.usgs.gov/mf/2001/mf-2391/mf-2391.zip
Access_Instructions:
Archived GIS files (not Section 508 accessible): ZIPPED ArcInfo files, metadata, etc. (15 MB)
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://pubs.usgs.gov/mf/2001/mf-2391/mf-2391.met
Access_Instructions:
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://pubs.usgs.gov/mf/2001/mf-2391/
Access_Instructions:
Digital GIS data, metadata, and PDF files of map may be downloaded from this URL.
Fees: None
Fees: None
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Metadata_Reference_Information:
Metadata_Date: 20030303
Metadata_Review_Date: 20041020
Metadata_Future_Review_Date: 20040303
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: RALPH R. SHROBA
Contact_Position: DIF AUTHOR
Contact_Position: TECHNICAL CONTACT
Contact_Position: INVESTIGATOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: U.S. Geological Survey
Address: Box 25046, MS 913
Address: Denver Federal Center
City: Denver
State_or_Province: CO
Postal_Code: 80225-0046
Country: USA
Contact_Voice_Telephone: 303-236-1292
Contact_Facsimile_Telephone: 303-236-0214
Contact_Electronic_Mail_Address: rshroba@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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