Metadata: Identification_Information: Citation: Citation_Information: Originator: Carver, G. A. Originator: Bemis, S. P. Originator: Solie, D. N. Originator: Castonguay, S. R. Originator: Obermiller, K. E. Publication_Date: 2010 Title: Active and potentially active faults in or near the Alaska Highway corridor, Dot Lake to Tetlin Junction, Alaska Geospatial_Data_Presentation_Form: tabular digital data Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2010-1 Publication_Information: Publication_Place: Fairbanks, Alaska - USA Publisher: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Other_Citation_Details: 41 p. Online_Linkage: http://dx.doi.org/10.14509/21121 Description: Abstract: In 2005, the Alaska Division of Geological & Geophysical Surveys initiated a multi-year geologic field study focused on a corridor centered along the Alaska Highway between Delta Junction and the Canada border. The purpose of this project is to provide geologic information relevant to a proposed Alaska-Canada natural gas pipeline and other future development in the corridor. The scope of this project includes identification of active faults and characterization of seismic hazards. During the 2008 field season the active fault studies were focused on the central part of the corridor between Dot Lake and Tetlin Junction. Field studies included helicopter and fixed-wing air reconnaissance augmented by interpretation of stereo air photos, remotely sensed images, ground reconnaissance, and field mapping. Detailed investigations were conducted where the reconnaissance identified lineaments indicative of Holocene surface faulting. In addition, detailed field studies were conducted of several lineaments identified in the published literature as possible active faults. The detailed studies included field mapping, topographic profiling, trenching, and 14C dating of surficial sediments associated with lineaments exhibiting characteristics of active faults. Two faults and a large fault-related anticline were found to have generated late Pleistocene and Holocene surface deformation in the Dot Lake-Tetlin Junction section of the corridor. These structures, the eastern part of the Dot "T" Johnson fault, the Cathedral Rapids fault, and the Giant Moletrack anticline, are active structures in the eastern part of the NFFTB. Detailed investigation of the Mansfield and Dennison Fork lineaments, identified as candidate active faults in the literature, produced conclusive evidence that they are not active faults. Detailed study of a third suspect lineament, the Bear Creek lineament, was inconclusive. Purpose: This report is a part of ADGGS's Alaska Natural Gas Pipeline Geology and Geohazards project. The study was done in anticipation of the proposed natural gas pipeline along the Alaska Highway corridor. Recognition of potentially active faults is an important factor in design engineering of infrastructure. Supplemental_Information: The publication consists of a report and a spreadsheet. The spreadsheet is a compilation of the information provided in Table 1 and in APPENDIX 1 of the report. This dataset consists of a single layer which is listed and described in detail under its own heading starting with "Entity_Type_Label." The layer is titled: >pir2010_1 14c ages for samples collected from trenches in 2008 Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 2008 Ending_Date: 2010 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: Unknown Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -144.46733 East_Bounding_Coordinate: -143.2201 North_Bounding_Coordinate: 63.69089 South_Bounding_Coordinate: 63.10523 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Active Fault Theme_Keyword: C14 Theme_Keyword: Earthquake Theme_Keyword: Faults Theme_Keyword: Faulting Theme_Keyword: Gasline Theme_Keyword: Geologic Hazards Theme_Keyword: Proposed Natural Gas Pipeline Theme_Keyword: Strike-Slip Theme_Keyword: Structural Geology Theme_Keyword: Structure Theme_Keyword: Tectonics Theme_Keyword: Thrust Theme_Keyword: Transportation Corridor Place: Place_Keyword_Thesaurus: None Place_Keyword: Alaska Highway Corridor Place_Keyword: Dot Lake Place_Keyword: Robertson River Place_Keyword: Tanacross Place_Keyword: Tanacross Quadrangle Place_Keyword: Taylor Highway Place_Keyword: Tetlin Place_Keyword: Tok Place_Keyword: Tok River Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: White River Ash Stratum_Keyword: Yukon-Tanana Upland Stratum_Keyword: Denali Fault Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: Holocene Temporal_Keyword: Quaternary Temporal_Keyword: Pleistocene Access_Constraints: This report, map, and/or dataset are available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below). Use_Constraints: Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. User specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Contact_Position: GIS Data Manager/Cartographer Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Contact_Voice_Telephone: (907) 451-5010 Contact_Facsimile_Telephone: (907) 451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Contact_Instructions: You may view our web site at http://www.dggs.alaska.gov for the latest information on available data.Please e-mail your questions and data requests when possible since our web site and e-mail address will remain current even if our phone number and mailing address change. Data_Set_Credit: This research was supported by 2009, and 2010 Alaska State Capital Improvement Projects funding.Additional Acknowledgments: Peter Haeussler (USGS) and Gordon Seitz (San Diego State University) for reviews of the Dot "T" Johnson trench III and Sears Creek trench. Valuable discussions with Richard D. Reger (Reger Geologic Consulting), Robert F. Swenson (ADGGS Director and State Geologist), and Rodney A. Combellick (ADGGS Deputy Director) are also acknowledged. We also appreciate suggestions and insight provided by the ADGGS bedrock-mapping group, Joe Andrews, Larry Freeman and Melanie Werdon. The report was reviewed by Richard Koehler. Native_Data_Set_Environment: Adobe Acrobat Reader, and any text editor. Cross_Reference: Citation_Information: Originator: Reger, R. D. Originator: Stevens, D. S. P. Originator: Solie, D. N. Publication_Date: 2008 Title: Surficial-geologic map, Alaska Highway Corridor, Delta Junction to Dot Lake, Alaska Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2008-3A Publication_Information: Publication_Place: Fairbanks AK Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 2 sheets, scale 1:63,360 Cross_Reference: Citation_Information: Originator: Reger, R. D. Originator: Solie, D. N. Publication_Date: 2008 Title: Engineering-geologic map, Alaska Highway Corridor, Delta Junction to Dot Lake, Alaska Geospatial_Data_Presentation_Form: tabular digital data Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2008-3B Publication_Information: Publication_Place: Fairbanks AK Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 2 sheets, scale 1:63,360 Cross_Reference: Citation_Information: Originator: Carver, G. A. Originator: Bemis, S. P. Originator: Solie, D. N. Originator: Obermiller, K. E. Publication_Date: 2008 Title: Active and potentially active faults in or near the Alaska Highway corridor, Delta Junction to Dot Lake, Alaska Geospatial_Data_Presentation_Form: tabular digital data Series_Information: Series_Name: Preliminary Investigative Report Issue_Identification: PIR 2008-3D Publication_Information: Publication_Place: Fairbanks, AK Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: p. 32 Cross_Reference: Citation_Information: Originator: Reger, R. D. Originator: Hubbard, T. D. Originator: Carver, G. A. Publication_Date: Unpublished material Title: Surficial geology of the Alaska Highway corridor, Robertson River to Tetlin Junction, Alaska Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Preliminary Investigative Report Issue_Identification: PIR 2009-6A Publication_Information: Publication_Place: Fairbanks, AK Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: in press Cross_Reference: Citation_Information: Originator: Hubbard, T. D. Originator: Reger, R. D. Publication_Date: 2010 Title: Engineering-geologic map of the Alaska Highway Corridor, Robertson River to Tetlin Junction, Alaska Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2009-6B Publication_Information: Publication_Place: Fairbanks, AK Publisher: Alaska Department of Geological & Geophysical Surveys Other_Citation_Details: 4 sheets, scale 1:63,360 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Locations of trenches, core sites and profiles are given for the approximate mid-point of each feature. The radiocarbon samples were carefully extracted from trench walls and cores to minimize contamination. Samples were stored in the field in aluminum foil packets which were placed in labeled plastic bags after air-drying, and the dry samples transferred to labeled glass vials once they were out of the field. Before being sent to the laboratory for analyses, each sample was inspected through a binocular microscope, picked clean of mineral debris, and for some samples, individual plant macrofossils or charcoal grains were separated for analysis. Beta Analytic Radiocarbon Dating Laboratory in Miami Florida performed the radiocarbon age analyses on the 14C samples. Samples were pretreated using the acid/alkali/acid standard pretreatment protocol. All analysis was done using AMS methods and included 13C corrections. Quoted errors for laboratory ages represent 1 standard deviation statistics (68% probability) and are based on combined measurements of the sample, background, and modern reference standards. Measured 13C/12C ratios were calculated relative to the PDB-1 international standard and the radiocarbon years before present ("Lab Age") were normalized to -25 per mil. Laboratory ages were then calibrated using the OxCal v4.0 calibration program and the IntCal 04 calibration curve. All calibrated ages are reported as calibrated 2 sigma ranges before present (cal BP). The data in Appendix 1 report the method used, material type, paleoseismic significance, sample and lab numbers, lab age, 13C/12C ratios, and two-sigma calendar calibration result for each of the 20 radiocarbon samples. References for the calibration methods, as reported by Beta Analytic Inc. are: Stuiver, M., and van der Plicht, H., Radiocarbon, 1998, vol. 40, no. 3, p. xii-xiii. Stuiver, M. and others, Radiocarbon, 1998, vol. 40, no. 3, p. 1041-1083. Talma, A.S. and Vogel, J.C., Radiocarbon, 1993, vol. 35, no. 2, p. 317-322. Logical_Consistency_Report: not applicable Completeness_Report: All of the samples collected for dating were submitted for analysis and presented in this report. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Locations of points recorded in the table were recorded using a Garmin GPS model 76CSx with a horizontal error of 4 meters or less. The locations are for approximate mid-point of each trench. Individual radiocarbon age samples in Appendix 1 are referred to their respective trenches and core sites whose locations are listed in Table 1. The spreadsheet distribution file is a compilation of Table 1 and Appendix 1. The actual location of each radiocarbon sample within the trench or core is shown in the trench logs and core logs in the figures of this report. Locations shown on the logs were determined using a metric tape, measuring distances from defined origins, to half-centimeter accuracy. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Bemis, S. P. Originator: Wallace, W. K. Publication_Date: 2007 Title: Neotectonic framework of the north-central Alaska Range foothills Geospatial_Data_Presentation_Form: book chapter Series_Information: Series_Name: Geological Society of America Special Paper 431 Issue_Identification: Special Paper 431 Other_Citation_Details: p. 549-572 Larger_Work_Citation: Citation_Information: Originator: Ridgeway, K. D. Originator: Trop, J. M. Originator: Glen, M. G. Originator: O'Neill, J. M. Publication_Date: 2007 Title: Tectonic growth of a collisional continental margin Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Geological Society of America Special Paper Issue_Identification: Special Paper 431 Other_Citation_Details: editors Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2007 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Bemis and Wallace, 2007 Source_Contribution: tectonic framework Source_Information: Source_Citation: Citation_Information: Originator: Bemis, S. P. Publication_Date: 2004 Title: Neotectonic framework of the north-central Alaska Range foothills Geospatial_Data_Presentation_Form: document Publication_Information: Publication_Place: Fairbanks AK Publisher: University of Alaska Fairbanks Other_Citation_Details: Masters Theses, 142 pages Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2004 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Bemis thesis, 2004 Source_Contribution: tectonic framework Source_Information: Source_Citation: Citation_Information: Originator: Bemis, S. P. Originator: Weldon, R. J. Originator: Burns, P. A. C. Publication_Date: 2005 Title: Progress in characterizing active faults of the northern flank of the Alaska Range Geospatial_Data_Presentation_Form: conference proceedings Series_Information: Series_Name: Geological Society of America Abstracts with Programs Issue_Identification: v. 37, no. 7, p.78 Other_Citation_Details: Geological Society of America Abstracts with Programs, vol.37, no. 7, p. 78 Annual Meeting, October 16, 2005 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2005 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Bemis, Weldon & Burns, 2005 Source_Contribution: Canteen fault abstract Source_Information: Source_Citation: Citation_Information: Originator: Burns, L. E. Originator: Fugro Airborne Surveys Originator: Stevens Exploration Management Corp. Publication_Date: 2006 Title: Line, grid and vector data, and plot files for the airborne geophysical survey of the Alaska Highway corridor, east-central Alaska Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Geophysical Report Issue_Identification: GR 2006-6 Publication_Information: Publication_Place: Fairbanks AK Publisher: Alaska Division of Geological & Geophysical Surveys Type_of_Source_Media: DVD Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2006 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Burns, 2006 Source_Contribution: airborne geophysical data Source_Information: Source_Citation: Citation_Information: Originator: Carver, G. A. Originator: Plafker, George Originator: Metz, M.C. Originator: Cluff, Lloyd Originator: Slemmons, Burt Originator: Johnson, Elden Originator: Roddick, Jim Originator: Sorensen, Steve Publication_Date: 2004 Title: Surface rupture on the Denali fault interpreted from tree damage during the 1912 Delta River MW7.2-7.4 earthquake: Implications for the 2002 Denali fault earthquake slip distribution Geospatial_Data_Presentation_Form: journal article Series_Information: Series_Name: Bulletin of the Seismological Society of America Issue_Identification: vol 94, no. 6B Other_Citation_Details: p. S58-S71 Larger_Work_Citation: Citation_Information: Originator: Rowe, C. A. Originator: Christensen, Douglas Originator: Carver, G. A. Publication_Date: 2004 Title: The 2002 Denali fault earthquake sequence Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Bulletin of the Seismoloigcal Society of America Issue_Identification: Dedicated Issue Other_Citation_Details: v.94, no.6B Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2002 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Carver and others, 2004 Source_Contribution: Denali fault surface rupture Source_Information: Source_Citation: Citation_Information: Originator: Carver, G. A. Originator: Plafker, George Originator: Metz, M.C. Originator: Cluff, Lloyd Originator: Bemis, S.P. Originator: Roddick. Jim Originator: Redington, J. Originator: Sorensen, Steve Publication_Date: 2006 Title: Late Quaternary growth of thrust faults and associated folds in the eastern part of the Northern Foothills Fold and Thrust Belt, central Alaska Range, Alaska Geospatial_Data_Presentation_Form: conference proceedings Publication_Information: Publication_Place: Alaska Publisher: American Geophysical Union Other_Citation_Details: Chapman Conference on Active Tectonics and Seismic Potential of Alaska, May 11-14, 2006 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2006 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Carver and others, 2006 Source_Contribution: eastern Northern Foothills fold and thrust belt Source_Information: Source_Citation: Citation_Information: Originator: Matmon, Ari Originator: Schwartz, D. P. Originator: Haeussler, P. J. Originator: Finkel, R. Originator: Lienkaemper, J. J. Originator: Stenner, H. D. Originator: Dawson, T. E. Publication_Date: 2006 Title: Denali fault slip rates and Holocene-late Pleistocene kinematics of central Alaska Geospatial_Data_Presentation_Form: journal article Series_Information: Series_Name: Geology Issue_Identification: v.34, no.8 Other_Citation_Details: p.645-648 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2006 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Matmon and others, 2006 Source_Contribution: Denali slip rates, central Alaska kinematics Source_Information: Source_Citation: Citation_Information: Originator: Page, R. A. Originator: Plafker, George Originator: Pulpan, Hans Publication_Date: 1995 Title: Block rotation in east-central Alaska: a framework for evaluating earthquake potential? Geospatial_Data_Presentation_Form: journal article Series_Information: Series_Name: Geology Issue_Identification: v.23, no.7 Other_Citation_Details: p.629-632 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Page and others, 1995 Source_Contribution: block rotation in east-central Alaska Source_Information: Source_Citation: Citation_Information: Originator: Plafker, George Originator: Gilpin, L. M. Originator: Lahr, J. C. Publication_Date: 1994 Title: Neotectonic map of Alaska Geospatial_Data_Presentation_Form: book chapter Other_Citation_Details: scale 1:2,500,000 Larger_Work_Citation: Citation_Information: Originator: Plafker, George Originator: Berg, H. C. Publication_Date: 1994 Title: The geology of Alaska Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: DNAG Issue_Identification: v.G-1 Publication_Information: Publication_Place: Boulder CO Publisher: Geological Society of America Other_Citation_Details: editors 12 plates Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1994 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Plafker and others, 1994 Source_Contribution: Neotectonic map of Alaska Source_Information: Source_Citation: Citation_Information: Originator: Reger, R. D. Originator: Stevens, D. S. P. Originator: Solie, D. N. Publication_Date: 2008 Title: Surficial-geologic map of the Alaska Highway corridor, Delta Junction to Dot Lake, Alaska Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2008-3A Publication_Information: Publication_Place: Fairbanks AK Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 2 sheets, scale 1:63,360 Type_of_Source_Media: digital database file Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2008 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Reger and others, 2008 Source_Contribution: surficial geology map Source_Information: Source_Citation: Citation_Information: Originator: Carver, G. A. Originator: Bemis S. P. Originator: Solie, D. N. Originator: Obermiller, K. E. Publication_Date: 2008 Title: Active and potentially active faults in or near the Alaska Highway corridor, Delta Junction to Dot Lake, Alaska Geospatial_Data_Presentation_Form: tabular digital data Series_Information: Series_Name: Preliminary Investigative Report Issue_Identification: PIR 2008-3D Publication_Information: Publication_Place: Fairbanks, AK Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: p. 32 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2008 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Carver and others, 2008 Source_Contribution: potentially active faults Source_Information: Source_Citation: Citation_Information: Originator: Reger, R. D. Originator: Hubbard, T. D. Originator: Carver, G. A. Publication_Date: Unpublished material Title: Surficial geology of the Alaska Highway corridor, Robertson River to Tetlin Junction, Alaska Geospatial_Data_Presentation_Form: tabular digital data Series_Information: Series_Name: Preliminary Investigative Report Issue_Identification: PIR 2009-6A Publication_Information: Publication_Place: Fairbanks, AK Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: in press Type_of_Source_Media: digital database file Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2010 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Reger and others, in press Source_Contribution: surficial geology map Source_Information: Source_Citation: Citation_Information: Originator: Hubbard, T. D. Originator: Reger, R. D. Publication_Date: 2010 Title: Engineering-geologic map of the Alaska Highway Corridor, Robertson River to Tetlin Junction, Alaska Geospatial_Data_Presentation_Form: tabular digital data Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2009-6B Publication_Information: Publication_Place: Fairbanks, AK Publisher: Alaska Department of Geological & Geophysical Surveys Other_Citation_Details: 4 sheets, scale 1:63,360 Type_of_Source_Media: digital database file Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2010 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Hubbard and Reger, 2010 Source_Contribution: engineering - geologic map Process_Step: Process_Description: Initial reconnaissance - an initial interpretation of stereo air photos, remote sensed images, DEMs, and topographic maps of the corridor and surrounding regions was done prior to fieldwork. We also conducted a review of published and unpublished reports and geologic and geophysical survey maps to identify and locate lineaments and potentially active faults for further study. This initial phase was followed by helicopter reconnaissance of the corridor and adjacent regions with emphasis on potential faults and lineaments identified from the review of literature, air photos, remote sensed images, and maps. Based on the initial studies and the air reconnaissance, we identified lineaments and potentially active faults judged to warrant further studied in the field and selected sites for detailed investigation. Source_Used_Citation_Abbreviation: Bemis and Wallace, 2007 Source_Used_Citation_Abbreviation: Bemis thesis, 2004 Source_Used_Citation_Abbreviation: Bemis, Weldon & Burns, 2005 Source_Used_Citation_Abbreviation: Burns, 2006 Source_Used_Citation_Abbreviation: Carver and others, 2004 Source_Used_Citation_Abbreviation: Carver and others, 2006 Source_Used_Citation_Abbreviation: Matmon and others, 2006 Source_Used_Citation_Abbreviation: Page and others, 1995 Source_Used_Citation_Abbreviation: Plafker and others, 1994 Source_Used_Citation_Abbreviation: Reger and others, 2008 Source_Used_Citation_Abbreviation: Reger and others, in press Source_Used_Citation_Abbreviation: Carver and others, 2008 Source_Used_Citation_Abbreviation: Hubbard and Reger, 2010 Process_Date: 2008 Process_Step: Process_Description: Fieldwork - In July-August 2008, to further study specific sites identified in preliminary reconnaissance. The detailed investigations included geologic and geomorphic mapping, scarp profiling, measurement of scarp height and fault offset, and at selected sites, trenching and coring to develop paleoseismic information for active fault characterization Process_Date: 2008 Process_Step: Process_Description: Trenching - Trench sites were chosen to transect features suspected to be active faults, in order to expose a cross sectional view of faults and the most recent stratigraphy. At sites that were inaccessible to motorized excavation equipment we hand-dug the trenches. To facilitate field interpretation and logging we used nails to pin colored flagging along exposed contacts and faults on the cleaned trench walls. Logging of the trench walls was done by placing a grid of horizontal and vertical string lines over the exposed trench wall, and used this grid to accurately measure and transfer each feature to cross section Mylar. Each stratigraphic layer and feature of interest was described and locations of radiocarbon samples were recorded. Soil and sediment colors for each stratigraphic unit were defined using a Munsell Soil Color chart. Where possible, we collected radiocarbon samples from layers bounding faulting events to bracket the age of paleo-earthquakes interpreted from the stratigraphy. Upon completion, we backfilled the trenches, re-contoured the trench sites and replaced the natural vegetation. Process_Date: 2008 Process_Step: Process_Description: Labwork - The radiocarbon samples were carefully extracted to minimize contamination. Samples were stored in the field in aluminum foil bundles which were placed in labeled plastic bags after air-drying, and the dry samples transferred to labeled glass vials once they were out of the field. Before being sent to the laboratory for analyses, each sample was inspected through a binocular microscope, picked clean of mineral debris, and for some samples, individual plant macrofossils or charcoal grains were separated for analysis. Beta Analytic Radiocarbon Dating Laboratory in Miami Florida performed the radiocarbon age analyses on the 14C samples. Process_Date: 2008 Process_Step: Process_Description: Metadata creation - Metadata were assembled by T.D. Hubbard, G.C. Carver and R.A. Westbrook FGDC Standards using Metavist 1.2, DGGS 7.05, a data entry program for FGDC metadata with XML output. Process_Date: 2010 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Point Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 6 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -147.00000 Latitude_of_Projection_Origin: 0 False_Easting: 500000.0 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.0005 Ordinate_Resolution: 0.0005 Planar_Distance_Units: meters Planar_Coordinate_Layer_Name: pir2010_1 Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 7 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -141.000000 Latitude_of_Projection_Origin: 0 False_Easting: 500000.000000 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.0005 Ordinate_Resolution: 0.0005 Planar_Distance_Units: meters Planar_Coordinate_Layer_Name: pir2010_1 Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.978698 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: pir2010_1 Entity_Type_Label: pir2010_1.csv Entity_Type_Definition: Geographic coordinates for trenches, core site and profiles and analytical results for radiocarbon samples Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: Feature Attribute_Definition: name of the the geologic feature in which the trench, core site or profile is located Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys, refer to sources listed in the lineage section for specific information about the feature extent and nomenclature Attribute_Domain_Values: Unrepresentable_Domain: free text - names of geologic features Attribute: Attribute_Label: Site Attribute_Definition: name of the trench Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: free text - name of the trench Attribute: Attribute_Label: UTM Zone Attribute_Definition: UTM zone in which trench, core site or profile is located Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 6V Enumerated_Domain_Value_Definition: the UTM zone in which the sample was collected Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys, US National Imagery and Mapping Agency Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 7V Enumerated_Domain_Value_Definition: the UTM zone in which the sample was collected Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys, US National Imagery and Mapping Agency Attribute: Attribute_Label: UTM E Attribute_Definition: Easting in UTM zone 6 or 7, NAD 27, Clark 1866 Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 379831 Range_Domain_Maximum: 647503 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: UTM N Attribute_Definition: Northing in UTM zone 6 or 7, NAD 27, Clark 1866 Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 6999311 Range_Domain_Maximum: 7064849 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Sample Number Attribute_Definition: Sample number which is unique identifier for each radiocarbon sample, based on an abbreviation for trench followed by a consecutive number of sample collected from trench and depth in cm from surface. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: free text - unique sample number given to each radiocarbon sample analyzed. Attribute: Attribute_Label: Location Attribute_Definition: Location of sample within trench wall, as shown on gridded trench log, or in core. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: free text - description of location of each sample based on trench log Attribute: Attribute_Label: Sample Material Attribute_Definition: Type of carbon material dated Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: Type of carbon analyzed (i.e., detrital charcoal, peaty material, wood, charcoal). Attribute: Attribute_Label: Paleoseismic Significance Attribute_Definition: Purpose for obtaining the age date; what constraints on timing the age imparts Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: paleoseismic event or timing constrained by age date. Attribute: Attribute_Label: Lab Number Attribute_Definition: Unique identifying sample number assigned by the laboratory at Beta Analytic Inc. Attribute_Definition_Source: Beta Analytic Inc. Attribute_Domain_Values: Unrepresentable_Domain: Unique sample identifying numbers, preceded by "B" (e.g., B252298) Attribute: Attribute_Label: Lab Age BP Attribute_Definition: Radiocarbon years before present, ("present" being 1950). Quoted errors represent 1 standard deviation statistics. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys and Beta Analytic Inc. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 70 Range_Domain_Maximum: 10690 Attribute_Units_of_Measure: years Attribute: Attribute_Label: 13C/12C 0/00 Attribute_Definition: Measured ratio of 13C to 12C, calculated relative to the PCB-1 international standard. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys and Beta Analytic Inc. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -28.2 Range_Domain_Maximum: -22.8 Attribute_Units_of_Measure: 0/00 Attribute: Attribute_Label: Age Cal BP Attribute_Definition: Radiocarbon age calibrated to calendar years using the OxCal v4.0 calibration program and the IntCal 04 calibration curve. Ages reported as calibrated 2 sigma ranges before present. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys and Beta Analytic In. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 12,840 Attribute_Units_of_Measure: years Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Contact_Position: Natural Resource Technician Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: 907-451-5020 Contact_TDD/TTY_Telephone: None available. Contact_Facsimile_Telephone: 907-451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Contact_Instructions: Please view our Web site (http://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. Resource_Description: Preliminary Interpretive Report PIR 2010-1 Distribution_Liability: The State of Alaska makes no express or implied warranties (including warranties of merchantability and fitness) with respect to the character, function, or capabilities of the electronic services or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products, any failure thereof, or otherwise, and in no event will the State of Alaska's liability to the requester or anyone else exceed the fee paid for the electronic service or product. Standard_Order_Process: Non-digital_Form: Current publication is available on paper. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Fees: contact DGGS for current pricing Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: PDF Format_Version_Number: 1.6 File_Decompression_Technique: No compression applied Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://dx.doi.org/10.14509/21121 Digital_Form: Digital_Transfer_Information: Format_Name: CSV Format_Version_Number: None File_Decompression_Technique: No compression applied Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://dx.doi.org/10.14509/21121 Fees: Digital files on DVD are available for $10.00 (contact information below). Scanned images of these products may be viewed online or downloaded for free from the DGGS Web site. Ordering_Instructions: Order by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). The DGGS Web site (http://www.dggs.alaska.gov/pubs) has a list of electronic data available and an order form that can be printed. Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround: Two weeks unless special arrangements are made and an express fee is paid. Metadata_Reference_Information: Metadata_Date: 20100820 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical address Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: 907-451-5010 Contact_Facsimile_Telephone: 907-451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays. Contact_Instructions: Please contact us through the e-mail address above whenever possible. Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: none Metadata_Use_Constraints: If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys.