Identification_Information: Citation: Citation_Information: Originator: Joel E. Robinson Originator: Wes Hildreth Originator: Judy Fierstein Originator: Andrew T. Calvert Publication_Date: 2012 Title: Database for the Geologic Map of Three Sisters Volcanic Cluster, Cascade Range, Oregon Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Scientific Investigations Map Issue_Identification: SIM 3186 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/sim/3186/ Larger_Work_Citation: Citation_Information: Originator: Wes Hildreth Originator: Judy Fierstein Originator: Andrew T. Calvert Publication_Date: 2012 Title: Geologic Map of Three Sisters Volcanic Cluster, Cascade Range, Oregon Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Scientific Investigations Map Issue_Identification: SIM 3186 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/sim/3186/ Description: Abstract: The geologic map represents part of a late Quaternary volcanic field within which scores of eruptions have taken place over the last 50,000 years, some as recently as ~1,500 years ago. No rocks of early Pleistocene (or greater) age crop out within the map area, although volcanic and derivative sedimentary rocks of Miocene and Pliocene age are widespread to the east and west and are certainly buried beneath the younger volcanic field. Of the 145 volcanic map units described herein, only 22 are certainly older than late Pleistocene (>126 ka), and 12 are postglacial (<15 ka). The oldest unit identified yields an age of 532+/-7 ka, and the second oldest, 374+/-6 ka. Compositionally, 10 percent of the units are true basalt; 36 percent, basaltic andesite; 20 percent, andesite; 21.5 percent, dacite; and only 12.5 percent, rhyodacite or rhyolite. Most of the 145 volcanic map units described herein are newly defined, although equivalents of several were described by Taylor, 1978, 1987; Scott, 1987; and Scott and Gardner, 1992. Each is an eruptive unit derived from a single vent or fissure. Some are simple flow units, but many are shields, cones, or stacks of several lava flows that have chemical and mineralogical coherence. Each unit was delineated by field mapping on foot and its integrity confirmed, challenged, or revised by chemical and microscopic work in the laboratory. Definition of a few units required iterative acquisition of field and lab data over a period of years, providing a firm basis for subdividing, lumping, or correlating slightly heterogeneous sequences of lavas. Most units have narrow compositional ranges, but some show zoning or heterogeneity spanning ranges of a few percent SiO2. Purpose: This database was constructed in order to produce a geologic map as a basis for understanding volcanic and geothermal processes involved in the creation of the Three Sisters Volcanic Cluster. Supplemental_Information: This database contains geodatabase feature classes describing geologic lines and polygons, faults, caldera boundaries, and rock chemistry, and a raster of the topographic base. This metadata file provides an overview for all of these files. For more detailed metadata, please see the metadata provided with each individual geodatabase file. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2012 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -122.004185 East_Bounding_Coordinate: -121.493717 North_Bounding_Coordinate: 44.255487 South_Bounding_Coordinate: 43.994481 Keywords: Theme: Theme_Keyword: Three Sisters Volcanic Cluster Theme_Keyword: Basalt Theme_Keyword: Basaltic andesite Theme_Keyword: Andesite Theme_Keyword: Dacite Theme_Keyword: Rhyodacite Theme_Keyword: Rhyolite Theme_Keyword: lava flows Theme_Keyword: debris avalanche Place: Place_Keyword: United States of America Place_Keyword: Oregon Place_Keyword: Three Sisters Volcanic Cluster Place_Keyword: Bend, Oregon Place_Keyword: Sisters, Oregon Temporal: Temporal_Keyword: Quaternary Temporal_Keyword: Holocene Temporal_Keyword: Pleistocene Access_Constraints: none Use_Constraints: Uses of this digital geologic map should not violate the spatial resolution of the data. Although the digital form of the data removes the constraint imposed by the scale of a paper map, the detail and accuracy inherent in map scale are also present in the digital data. The data was edited at a scale of 1:24,000 and higher resolution information is not present in the dataset. Plotting at scales larger than 1:24,000 will not yield greater real detail, although it may reveal fine-scale irregularities below the intended resolution of the database. Similarly, where this database is used in combination with other data of higher resolution, the resolution of the combined output will be limited by the lower resolution of these data. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Joel E. Robinson Contact_Position: Geologist Contact_Address: Address_Type: mailing address Address: 345 Middlefield Road Address: MS 910 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: 650-329-5322 Contact_Facsimile_Telephone: 650-329-5203 Contact_Electronic_Mail_Address: jrobins@usgs.gov Contact_Instructions: Please contact via e-mail Security_Information: Security_Classification: none Native_Data_Set_Environment: Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.3.1.3000 Data_Quality_Information: Logical_Consistency_Report: Polygon and arc (chain-node) topology present in appropriate feature classes. Other feature classes are point, annotation or raster and do not require topologic relationships. Completeness_Report: The report is intended to describe completely the igneous and volcanic products, and volcanic vent locations at 1:24,000 scale. Geological information appropriately mapped at larger scale has been omitted. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Well located data items are intended to have a horizontal positional accuracy better than 0.5 mm at 1:24,000 scale, or within 12 meters on the ground. The general positional accuracy of each line in the database is indicated qualitatively within the LTYPE field in the Arc Attribute Table (see Attribute_Domain_Values). Points in the database are generally well located. The position of each data item is derived from a USGS 1:24,000 topographic base map, and therefore additional inaccuracies may also be encountered that are within National Map Accuracy Standards. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: No vertical positional data recorded Lineage: Source_Information: Source_Citation: Citation_Information: Originator: E.M. Taylor Publication_Date: 1978 Title: Field geology of S.W. Broken Top quadrangle, Oregon Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Oregon Department of Geology and Mineral Industries Special Paper Issue_Identification: 2 Publication_Information: Publication_Place: Oregon Publisher: Oregon Department of Geology and Mineral Industries Type_of_Source_Media: paper Source_Time_Period_of_Content: Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Taylor, 1978 Source_Information: Source_Citation: Citation_Information: Originator: E.M. Taylor Publication_Date: 1987 Title: Field geology of the northwest quarter of the Broken Top 15' quadrangle, Deschutes County, Oregon Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Oregon Department of Geology and Mineral Industries Special Paper Issue_Identification: 21 Publication_Information: Publication_Place: Oregon Publisher: Oregon Department of Geology and Mineral Industries Source_Scale_Denominator: 1:48,000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Taylor, 1987 Source_Information: Source_Citation: Citation_Information: Originator: W.E. Scott Publication_Date: 1987 Title: Holocene rhyodacite eruptions on the flanks of South Sister volcano, Oregon Series_Information: Series_Name: Geological Society of America Special Paper Issue_Identification: 212 Publication_Information: Publisher: Geological Society of America Other_Citation_Details: in Fink, J.H., ed., The emplacement of silicic domes and lava flows Type_of_Source_Media: paper Source_Time_Period_of_Content: Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Scott, 1987 Source_Information: Source_Citation: Citation_Information: Originator: W.E. Scott Originator: C.A. Gardner Publication_Date: 1992 Title: Geologic map of the Mount Bachelor volcanic chain and surrounding area, Cascade Range, Oregon Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Miscellaneous Investigations Series Map Issue_Identification: I-1967 Publication_Information: Publisher: U.S. Geological Survey Source_Scale_Denominator: 1:50,000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Scott and Gardner, 1992 Process_Step: Process_Description: Geologic linework was compiled on USGS 1:24,000-scale topographic maps by Wes Hildreth and Judy Fierstein. Joel Robinson scanned the geologic linework at 400 dpi, and georeferenced the scans. He converted the linework to vector data using head-up-digitizing. Polygon topology was created and each arc and polygon tagged on-screen by Joel Robinson and Judy Fierstein. Plotfiles were created and quadrangles were then plotted with topography to be checked by the authors. Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Joel E. Robinson Contact_Position: Geologist Contact_Voice_Telephone: 650-329-5322 Contact_Facsimile_Telephone: 650-329-5203 Contact_Electronic_Mail_Address: jrobins@usgs.gov Contact_Instructions: Please contact via e-mail Process_Step: Process_Description: Metadata imported. Source_Used_Citation_Abbreviation: C:\DOCUME~1\jrobins\LOCALS~1\Temp\f\xml15.tmp Process_Date: 20130312 Process_Time: 15093300 Process_Step: Process_Description: Metadata imported. Source_Used_Citation_Abbreviation: F:\Data2\VHZ\ThreeSisters\PublicationData\SIM3186GeologicMapThreeSistersVolcanicClusterOregon\metadata.xml Process_Date: 20130524 Process_Time: 13411700 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 1172 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 4 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 82 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 1005 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 211 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 792 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 509 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 10 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -123.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000005 Ordinate_Resolution: 0.000005 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 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Resolution: 0.000003 Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: The metatdata file was written to provide an overview for the complete database. For more informative descriptions of the attributes please see the metadata files associated with each feature class. There are three line feature classes, geology_arc, leaders_arc, and rivers_Project. The geology_arc feature class contains the geologic contacts, faults, dikes, scarps, and water boundaries. The LTYPE attribute describes the type of line and its positional certainty. The other associated fields are defined by the software and are described more specifically in the detailed metadata file associated with the geology_arc feature class. The leaders_arc feature class contains no additional descriptive attributes. Rivers_Project contains line representations of the map drainages for additional emphasis on the map base. All of the drainage names are contained in the WC_GNIS_NM attribute. There is one polygon feature class, geology_poly. The GeologicUnitSymbol attribute in geology_poly contains the geologic unit symbols for each polygon. These geologic unit symbols can be correlated or related to geologic names and descriptions by using the UnitDescriptions table contained in this database. The CinderCone attribute contains the word 'cinder' for all polygons that delineate Cinder Cones. There are two point feature classes in this release, strike_dip_pts, and vents_pts. The strike_dip_pts feature class contains the location of attitude measurements. The strike field contain the strike direction and the dip field contains the dip angle. The vents_pts feature class contains the locations of all of the volcanic vents in the map area. This feature class contains no additional descriptive attributes. The release also contains two tables. The UnitDescriptions table contains the complete geologic unit name, age, and description for each of the geologic unit symbol on the map. There is also a Relational Class relating this table to the geology_poly feature class through the MapUnit attribute. The ColorList table contains the GeologicUnitSymbol and the color number from the symbology style. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: Box 25286 Address: Denver Federal Center City: Denver State_or_Province: Colorado Postal_Code: 80225-0046 Country: USA Contact_Voice_Telephone: (303)202-4200 Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Facsimile_Telephone: (303)202-4695 Contact_Electronic_Mail_Address: infoservices@usgs.gov Resource_Description: Downloadable Data Distribution_Liability: This database has been approved for release and publication by the Director of the U.S. Geological Survey (USGS). Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ESRI file geodatabase Format_Version_Number: ESRI ArcCatalog 9.3.1.3000 File_Decompression_Technique: WinZip Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/sim/3186/ Metadata_Reference_Information: Metadata_Date: 20100225 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Joel E. Robinson Contact_Position: Geologist Contact_Address: Address_Type: mailing address Address: 345 Middlefield Road Address: MS 910 City: Menlo Park State_or_Province: CA Postal_Code: 95045 Country: USA Contact_Voice_Telephone: 650-329-5322 Contact_Facsimile_Telephone: 650-329-5203 Contact_Electronic_Mail_Address: jrobins@usgs.gov Contact_Instructions: Please contact via e-mail Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile