Identification_Information: Citation: Citation_Information: Originator: William H. Langer Publication_Date: 1988 Title: Digital map showing potential source areas of crushed stone aggregate and predominant bedrock types in these areas Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 1594 Publication_Information: Publication_Place: Denver, CO Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/bul/b1594/ Larger_Work_Citation: Citation_Information: Originator: William H. Langer Publication_Date: 1988 Title: Natural Aggregates of the Conterminous United States Geospatial_Data_Presentation_Form: plate Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 1594 Publication_Information: Publication_Place: Washington Publisher: United States Government Printing Office Online_Linkage: http://pubs.usgs.gov/bul/b1594/ Description: Abstract: This dataset is the digital version of the Map showing potential source areas of crushed stone aggregate and predominant bedrock types in these areas was compiled by William H. Langer and others in 1988. The paper version was included as Plate 2 in U.S. Geological Survey Bulletin 1594, Natural Aggregates of the Conterminous United States, at a scale of 1:5,000,000. The map shows the distribution of selected types of bedrock normally considered for use as crushed stone. One shapefile (rocktype) is included. It has polygon features of potential source areas of crushed stone aggregate and also shows the predominant bedrock types in these areas. The National Atlas state boundary and stream and water bodies base layers can be downloaded from the National Atlas website at http://nationalatlas.gov/atlasftp.html Purpose: This dataset was developed to provide digital GIS data of the Map showing potential source areas of crushed stone aggregate and predominant bedrock types in these areas included as Plate 2 of U.S. Geological Survey Bulletin 1594. Supplemental_Information: A description of the map preparation process and references can be found in U.S. Geological Survey Bulletin 1594, Natural Aggregates of the Conterminous United States, written by William H. Langer (1988). Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1988 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -127.5 East_Bounding_Coordinate: -65.5 North_Bounding_Coordinate: 51.5 South_Bounding_Coordinate: 23.75 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: crushed stone Theme_Keyword: aggregate Place: Place_Keyword_Thesaurus: none Place_Keyword: USA Access_Constraints: none Use_Constraints: This database is not meant to be used or displayed at any scale other than 1:5,000,000. Any hardcopies utilizing these data sets shall clearly indicate their source. If the licensee has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. Licensee specifically agrees not to misrepresent these data sets, nor to imply that changes they made were approved by the U.S. Geological Survey. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: William H. Langer Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: USGS, Denver Federal Center Address: P.O. Box 25046, MS 973 City: Denver State_or_Province: CO Postal_Code: 80225 Contact_Voice_Telephone: 303-236-1249 Contact_Facsimile_Telephone: 303-236-3200 Contact_Electronic_Mail_Address: blanger@usgs.gov Data_Set_Credit: William H. Langer and others Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 9.0.0.535 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The attribute values were assigned by gathering information from national or regional scale maps. A description of the map preparation process and references can be found in U.S. Geological Survey Bulletin 1594, Natural Aggregates of the Conterminous United States, written by William H. Langer (1988). For more detailed information, the user should see the references cited in Bulletin 1594 or should contact State geological surveys or State highway depatments at the addresses shown at the end of the Bulletin. Logical_Consistency_Report: All polygons were checked for closure with vendor software and on hard copy plots. Overshoots and undershoots have been deleted or corrected as appropriate. Completeness_Report: n/a Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The map was prepared at a scale of 1:5,000,000, or 1 inch equals approximately 79 miles. At this scale, the distribution of natural aggregates can not be shown in detail. Instead, the map is intended to be an overview; it shows the relative abundance of natural aggregates and the distribution of major areas where natural aggregates is likely to occur. Lineage: Process_Step: Process_Description: Information was gathered from national or regional scale maps. Process_Date: Unknown Process_Step: Process_Description: Map was compiled by transferring gathered information to a 1:5,000,000 scale base map. Information on the distribution of igneous and metamorphic rocks was obtained from the Geologic Map of the United States (King and Beikman, 1974). In reducing the map to the 1:5,000,000 scale, some of the smaller units had to be combined, enlarged, or deleted. Decisions were made based on an attempt to reflect the general distribution of rock types in an area. The distribution of limestone and dolomite was obtained from a number of sources. Because of differing scales and mapping techniques, adjustments to mapped units, commonly to conform to the King and Beikman map, were necessary. Process_Date: Unknown Process_Step: Process_Description: Drafts of Plate 2 were sent to the directors of each of the State highway departments and State geological surveys of the conterminous United States for their comments and review. More than 80 percent of the agencies responded. The map reflects the State reviews wherever possible. The comments of the State agencies are greatly appreciated; however, their comments do not necessarily represent an endorsement of this report. Furthermore, the State agencies that responded to the review request did not officially approve the maps, and they have no official responsibility for the data shown on the maps or discussed in the report. This responsibility rests solely with the author of the Bulletin. Process_Date: Unknown Process_Step: Process_Description: Internal review and subsequent edits were made. Plate 2 of USGS Bulletin 1594 was created and published in 1988. Plate 2 was digitized, and the shapefile rocktype was created and attributed at a later date. Process_Date: Unknown Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 1742 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Lambert Conformal Conic Lambert_Conformal_Conic: Standard_Parallel: 33.000000 Standard_Parallel: 45.000000 Longitude_of_Central_Meridian: -96.000000 Latitude_of_Projection_Origin: 39.000000 False_Easting: 0.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.008192 Ordinate_Resolution: 0.008192 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: rocktype Entity_Type_Definition: Shapefile for the crushed stone aggregate bedrock type polygon data. Entity_Type_Definition_Source: Author Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: AREA Attribute_Definition: Area of polygon. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: PERIMETER Attribute_Definition: Perimeter of polygon. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: ROCK_TYPE2 Attribute_Definition: Type of bedrock. Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: carbonate Enumerated_Domain_Value_Definition: Major areas where sedimentary carbonate rocks are the predominate type. Mapped areas are primarily limestones (calcium carbonate) and dolomites (calcium-magnesium carbonate). Some limestones mapped may be too soft to provide aggregate for crushed stone. They include lesser amounts of other rock types, particularly other interbedded sedimentary rocks. Clastic sedimentary rocks (rocks such as conglomerates, sandstones and siltstones) are not shown on the map as they are not commonly used as crushed stone. However, they may provide suitable sources of crushed stone in some areas. Enumerated_Domain_Value_Definition_Source: Author Enumerated_Domain: Enumerated_Domain_Value: felsic intrusive Enumerated_Domain_Value_Definition: Felsic (acidic), light-colored, coarsely crystalline, igneous rocks, containing large percentages of felsic minerals. Common rock types include granite and syenite. Enumerated_Domain_Value_Definition_Source: Author Enumerated_Domain: Enumerated_Domain_Value: felsic volcanic Enumerated_Domain_Value_Definition: Felsic (acidic), light-colored, finely crystalline, igneous rocks, containing large percentages of felsic minerals (light-colored minerals such as feldspar and quartz). Common rock type is rhyolite. Enumerated_Domain_Value_Definition_Source: Author Enumerated_Domain: Enumerated_Domain_Value: mafic intrusive Enumerated_Domain_Value_Definition: Mafic (basic), dark-coloerd, coarsely crystalline, igneous rocks, containing large percentages of mafic minerals. Common rock types include diabase and gabbro. Enumerated_Domain_Value_Definition_Source: Author Enumerated_Domain: Enumerated_Domain_Value: mafic volcanic Enumerated_Domain_Value_Definition: Mafic (basic), dark-colored, finely crystalline, igneous rocks, containing large percentages of mafic minerals (dark-colored minerals or ferromagnesian minerals). Common rock types include andesite and basalt. Enumerated_Domain_Value_Definition_Source: Author Enumerated_Domain: Enumerated_Domain_Value: metamorphic and other undifferentiated crystalline rocks Enumerated_Domain_Value_Definition: Primarily metamorphic rocks and older (pre-Mesozoic) volcanic rocks. Common rock types include schist, gneiss, and other metamorphosed sedimentary rocks. Metamorphic rocks are highly variable in physical and chemical properties. Many of the areas mapped may not provide suitable aggregates for certain uses. Enumerated_Domain_Value_Definition_Source: Author Enumerated_Domain: Enumerated_Domain_Value: ultramafic intrusive rocks Enumerated_Domain_Value_Definition: Mafic (basic), dark-colored, coarsely crystalline, igneous rocks, composed almost entirely of mafic minerals. Common rock types are serpentine and dunite. Enumerated_Domain_Value_Definition_Source: Author Enumerated_Domain: Enumerated_Domain_Value: undifferentiated volcanic Enumerated_Domain_Value_Definition: Finely crystalline igneous rocks of undetermined mineral content. Enumerated_Domain_Value_Definition_Source: Author Attribute: Attribute_Label: MAJ_DIV2 Attribute_Definition: Major geologic division. Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: sedimentary Enumerated_Domain_Value_Definition: Sedimentary rock Enumerated_Domain_Value_Definition_Source: Author Enumerated_Domain: Enumerated_Domain_Value: igneous Enumerated_Domain_Value_Definition: Igneous rock Enumerated_Domain_Value_Definition_Source: Author Enumerated_Domain: Enumerated_Domain_Value: metamorphic Enumerated_Domain_Value_Definition: Metamorphic rock Enumerated_Domain_Value_Definition_Source: Author Attribute: Attribute_Label: IGNEOUS_DI Attribute_Definition: Igneous rock descriptor. Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: intrusive Enumerated_Domain_Value_Definition: Intrusive rock Enumerated_Domain_Value_Definition_Source: Author Enumerated_Domain: Enumerated_Domain_Value: extrusive Enumerated_Domain_Value_Definition: Extrusive rock Enumerated_Domain_Value_Definition_Source: Author Enumerated_Domain: Enumerated_Domain_Value: null Enumerated_Domain_Value_Definition: Not igneous rock. Enumerated_Domain_Value_Definition_Source: Author Overview_Description: Entity_and_Attribute_Overview: Mapped units show the general distribution of bedrock commonly utilized as crushed stone. Because of the complex nature of bedrock, major areas of the predominant bedrock type are shown. Some mapped areas have been greatly exaggerated for clarity. In some areas (particularly glaciated areas), sufficient cover overlies the bedrock to make surface mining uneconomical. In unmapped areas, smaller occurrences of suitable rock types (other than those shown on this map) may occur that, locally, yield suitable crushed stone. Entity_and_Attribute_Detail_Citation: ESRI 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: P.O. Box 25286 City: Denver State_or_Province: CO Postal_Code: 80225-0286 Country: USA Contact_Voice_Telephone: (888) ASK-USGS Resource_Description: Downloadable Data Distribution_Liability: Although these data have been subjected to rigorous review and are substantially complete, they are released on the condition that neither the U.S. Geological Survey nor the United States Government may be held liable for any damages resulting from their authorized or unauthorized use. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: SHP Format_Version_Number: ArcGIS v. 9.0 File_Decompression_Technique: .zip -- self-extracting Window ZIP archive (SHP files) -- execute file to extract Transfer_Size: 2.347 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/bul/b1594/ Fees: Contact USGS at the address listed above Metadata_Reference_Information: Metadata_Date: 20041207 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Laurie C. Morath Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: USGS, Denver Federal Center Address: P.O. Box 25046, MS 973 City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-236-5361 Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: None Metadata_Use_Constraints: None Metadata_Extensions: Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile