Identification_Information: Citation: Citation_Information: Originator: Gregory J. Walsh Publication_Date: 2003 Title: Bedrock Geologic Map of the New Milford Quadrangle, Litchfield and Fairfield Counties, Connecticut Edition: 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 03-487 Publication_Information: Publication_Place: Reston, Virginia Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/of/2003/of03-487 Description: Abstract: The bedrock geology of the New Milford quadrangle, Litchfield and Fairfield Counties, Connecticut is described in this report. The database includes contacts of bedrock geologic units, faults, outcrops, structural geologic information, and photos. Purpose: The map was published as part of a study of fractured bedrock aquifers. The digital data are intended for use by all government, academic, commercial, or other agencies in need of digital geologic map information. Supplemental_Information: Data were originally collected in UTM coordinates, zone 18, NAD 1927, and reprojected to geographic coordinates (Lat/Long), NAD 1983. The database is accompanied by two large format color maps, an explanatory pamphlet, and a readme.txt file. This report is available from the internet at or a CD is also available from - U.S. Geological Survey Information Services Box 25286 Federal Center Denver, CO 80225 1-888-ASK-USGS ask@usgs.gov Printed paper maps are available from - USGS Maps on Demand The database includes geologic map data in Arc/Info export-interchange file equivalents (files with *.e00 extensions). These coverages provide the scientific content of the mapped data. The coverages include - CONTX--Polygon coverage for the contacts of geologic map units FAULTS--Line coverage of geologic faults OUTCROP--Polygon coverage of outcrops STRUX--Point coverage of geologic structure data PHOTO--Point coverage of photographs Base Map Data - NMbase.tif--Black and white TIFF bitmap image NMbase.tfw--Worldfile for registering image base The data are also available as ArcView shapefiles (*.dbf, *.shp, *.shx) and related DBF tables. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Gregory J. Walsh Contact_Position: Geologist Contact_Address: Address_Type: mailing address Address: P.O. Box 628 City: Montpelier State_or_Province: Vermont Postal_Code: 05601 Country: USA Contact_Voice_Telephone: 802-828-4528 Contact_Facsimile_Telephone: 802-828-4465 Contact_Electronic_Mail_Address: gwalsh@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: and Browse_Graphic_File_Description: Reduced-size image showing the general layout of the map sheets. Browse_Graphic_File_Type: GIF Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 2000 Ending_Date: 2003 Currentness_Reference: publication date Status: Progress: complete Maintenance_and_Update_Frequency: none planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -73.5000 East_Bounding_Coordinate: -73.3750 North_Bounding_Coordinate: 41.6250 South_Bounding_Coordinate: 41.5000 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: geology Theme_Keyword: geologic Theme_Keyword: bedrock Place: Place_Keyword_Thesaurus: None Place_Keyword: Connecticut Place_Keyword: New Milford Place_Keyword: Litchfield Place_Keyword: Fairfield Access_Constraints: none Use_Constraints: Although all data released in this report have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and (or) the functioning of the software. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: All attributes digitized during the creation process were verified by displaying the lines and points in the database with respect to the USGS 7.5-minute topographic map, but no formal tests were performed. Logical_Consistency_Report: These data are believed to be logically consistent, though no tests were performed. Line geometry is topologically clean. Completeness_Report: The geologic contacts were delineated on a USGS 7.5-minute topographic map based on observations at the outcrops shown in the database. Not all outcrops within the area were identified or visited during mapping. The geologic contacts might change if additional outcrops are discovered or exposed as the natural land changes or as the result of development. The features in the database are not based on legal parcels or definitions. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The data were created on a USGS 7.5 minute topographic map at 1:24000 scale. Therefore, the horizontal accuracy is assumed to be within National Map Accuracy Standards, with a horizontal accuracy of 45.6 feet at the 95% confidence level. Locational information in the field was provided by Rockwell PLGR+96 GPS receivers using the Federal precise positioning service. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The data were delineated on a USGS 7.5 minute topographic map at 1:24000 scale. Therefore, the vertical accuracy is assumed to be within National Map Accuracy Standards, with a vertical accuracy of 11.9 feet at the 95% confidence level. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Gregory J. Walsh Publication_Date: 2003 Title: Bedrock geologic map of the New Milford quadrangle, Litchfield and Fairfield Counties, Connecticut Edition: 1.0 Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Reston, Virginia Publisher: U.S. Geological Survey Other_Citation_Details: Walsh, G.J., 2003, Bedrock geologic map of the New Milford quadrangle, Litchfield and Fairfield Counties, Connecticut: U.S. Geological Survey Open-File Report 03-487, scale 1:24,000. Online_Linkage: Source_Scale_Denominator: 24000 Type_of_Source_Media: mylar Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 2000 Ending_Date: 2001 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Walsh 2003 Source_Contribution: The geology was mapped by Walsh in 2000 and 2001. The database represents original work by Walsh Process_Step: Process_Description: Geology mapped by Walsh in 2000 and 2001 at a scale of 1:24,000. Locational information was provided by Rockwell PLGR+96 GPS receivers using the Federal precise positioning service. The line and polygon data were compiled on mylar and scanned at 400 dpi on an Anatech Eagle 4080T scanner. The raster files (TIF) were converted to vector files (DXF) using GTX OSR version 2.0 raster-to-vector conversion software. The vector files were imported to Arc/Info version 8.0.2. Point data were collected with GPS and hand-held 3COM Palm Pilot III PDA computers. Data from the PDAs were combined in Microsoft Access, and then imported as ASCII text files and DBASE IV (dbf) files into Arc/Info. Source_Used_Citation_Abbreviation: Walsh 2003 Process_Date: 2003 Source_Produced_Citation_Abbreviation: Walsh 2003 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Gregory J. Walsh Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: P.O. Box 628 City: Montpelier State_or_Province: Vermont Postal_Code: 05601 Country: USA Contact_Voice_Telephone: 802-828-4528 Contact_Facsimile_Telephone: 802-828-4465 Contact_Electronic_Mail_Address: gwalsh@usgs.gov Hours_of_Service: 0900 to 1700 eastern standard time Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: .0001 Longitude_Resolution: .0001 Geographic_Coordinate_Units: Decimal Degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6,378,137 Denominator_of_Flattening_Ratio: 298.257 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Entity_and_Attribute_Detail_Citation: Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - Information Services Contact_Address: Address_Type: mailing address Address: Box 25286 Federal Center City: Denver State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Electronic_Mail_Address: ask@usgs.gov Hours_of_Service: 0900 to 1700 mountain standard time Resource_Description: USGS Open-File Report 03-487 Distribution_Liability: These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, or implied, or assume any legal liability or responsibility the accuracy, completeness, or usefulness of any information, product or process disclosed in this report, and represents its use would not infringe privately owned rights. The act distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data related materials. Reference therein to any specific commercial product, process, or related service by trade name, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring the United States Government or any agency thereof. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Arc/Info export and ArcView shapefile Digital_Transfer_Option: Offline_Option: Offline_Media: compact disc Recording_Format: CD ISO 9660 standard Compatibility_Information: Windows 95/98/NT/2000/XP, Macintosh OS 7.1 or greater (.pdf, .gif, .tif., and .htm files only), UNIX Fees: $20 per map + $5 S&H, $10 for CD, Internet data is free Ordering_Instructions: Call 1-888-ASK-USGS or visit the web at The compact disc and maps can be obtained from - USGS Information Services Box 25286 Denver, CO 80225 ask@usgs.gov 1-303-202-4200 Metadata_Reference_Information: Metadata_Date: 20030219 Metadata_Review_Date: 2003 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Gregory J. Walsh Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical address Address: P.O. Box 628 City: Montpelier State_or_Province: VT Postal_Code: 05663 Country: USA Contact_Voice_Telephone: 802-828-4528 Contact_Facsimile_Telephone: 802-828-4465 Contact_Electronic_Mail_Address: gwalsh@usgs.gov Hours_of_Service: 0900 to 1700 eastern standard time Metadata_Standard_Name: FGDC CSDGM Metadata_Standard_Version: FGDC-STD-001-1998