Carver, G.A Bemis, S.P. Solie, D.N. Obermiller, K.E. 200811 tabular digital data Preliminary Interpretive Report PIR 2008-3D Fairbanks, Alaska - USA State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys 32 p. http://www.dggs.dnr.state.ak.us/pubs/pubs During the 2006 and 2007 field seasons, geologic features indicative of possible youthful surface faulting in or near the Alaska Highway corridor between Delta Junction and Dot Lake were identified by helicopter and fixed-wing air reconnaissance, augmented by interpretation of stereo air photos, remotely sensed images, and aeromagnetic and electromagnetic (EM) datanction to the eastern boundary of the Mt. Hayes Quadrangle. The largest of these faults is the previously unrecognized Dot "T" Johnson fault, a major west-trending, south-dipping thrust fault bordering the northern margin of the Alaska Range along the south side of the Tanana River valley. Two other faults identified as active in this study, the Canteen and Granite Mountain-Panoramic faults, are northeast-trending, left-lateral, strike-slip faults that connect segments of the Dot "T" Johnson thrust system, where they are separated by large left steps. The Billy Creek fault is a northeast-trending, left-lateral, strike-slip fault in the Yukon-Tanana Upland north of the Tanana River valley. This report is a part of ADGGS'sAlaska 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. Attribute information for the following tables (entities) is included in this metadata file under the "Entity_and_Attribution_Information" section. Layers include: > Table1_Coordinates geographic coordinates for trenches, core site, and profiles > Appendix1_14C_Ages analytical results for radiocarbon samples 2006 2007 ground condition Complete Unknown -145.50000 -143.90000 64.00000 63.50000 None Alaska Pipeline C14 Geologic Hazards Faults Faulting Strike-Slip Structural Geology Structure Thrust Transportation Corridor None Alaska Highway Corridor Big Delta Big Delta Quadrangle Delta Junction Delta River Mount Hayes Quadrangle Tanana River Dot Lake None White River Ash Nenana Gravel Yukon-Tanana Upland Denali Fault None Holocene Quaternary Pleistocene 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). 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. State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys GIS Data Manager/Cartographer mailing and physical

3354 College Road

Fairbanks AK 99709-3707 (907) 451-5029 (907) 451-5020 (907) 451-5050 dggspubs@alaska.gov You may view our web site at http://www.dggs.dnr.state.ak.us 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. This research was supported by 2005 and 2006 Alaska State Capital Improvement Projects funding.Additional Acknowledgments: Ray J. Weldon (University of Oregon) for reviews of the Billy Creek, Canteen, and Dot "T" Johnson I and II trenches; Peter Haeussler (USGS) and Gordon Seitz (San Diego State University) for reviews of the 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. The report was reviewed by Richard D. Reger. Adobe Acrobat Reader, and any text editor. Reger, R.D. Stevens, D.S.P. Solie, D.N. 2008 map Preliminary Interpretive Report PIR 2008-3a Fairbanks AK Alaska Division of Geological & Geophysical Surveys 2 sheets, scale 1:63,360 Reger, R.D. Solie, D.N. 2008 tabular digital data Preliminary Interpretive Report PIR 2008-3b Fairbanks AK Alaska Division of Geological & Geophysical Surveys 2 sheets, scale 1:63,360 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. not applicable This dataset includes 18 of the 23 carbon samples that were submitted from this project to Beta Analytic Inc. after the 2007 field season. Of the 23 submitted, three did not have sufficient carbon material to date and the analyses were cancelled. The two unreported samples, from the Billy Creek Trench, yielded results with modern 14C signatures. These samples, both from within a half meter from the surface, are interpreted as being the result of recent localized animal activity and thus not representative. 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 Apppendix 1 are referred to their respective trenches and core sites whose locations are listed in Table 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. Bemis, S.P. Wallace, W.K. 2007 book chapter Geological Society of America Special Paper 431 SP 431 p. 549-572 Ridgeway, K.D. Trop, J.M. Glen, M.G. O'Neill, J.M. 2007 document Geological Society of America Special Paper Speical Paper 431 editors paper 2007 publication date Bemis and Wallace, 2007 tectonic framework Bemis, S.P. 2004 document Fairbanks, AK University of Alaska Fairbanks Masters Theses, 142 pages paper 2004 publication date Bemis thesis, 2004 tectonic framework Bemis, S.P. Weldon, R.J. Burns, P.A.C. 2005 conference proceedings Geological Society of America Abstracts with Programs v. 37, no. 7, p.78 Geological Society of America Abstracts with Programs, vol.37, no. 7, p. 78, Annual Meeting, October 16, 2005 paper 2005 publication date Bemis, Weldon & Burns, 2005 Canteen fault abstract Burns, L.E. Fugro Airborne Surveys Stevens Exploration Management Corp. 2006 vector digital data Geophysical Report GR 2006-6 Fairbanks AK Alaska Division of Geological & Geophysical Surveys DVD 2006 ground condition Burns, 2006 airborne geophysical data Carver, G.A. Plafker, George Metz, Mike Cluff, Lloyd Slemmons, Burt Johnson, Elden Roddick, Jim Sorensen, Steve 2004 journal article Bulletin of the Seismological Society of America vol 94, no. 6B p. S58-S71 Rowe, C.A. Christensen, Doug Carver, G.A. 2004 document Bulletin of the Seismoloigcal Society of America Dedicated Issue v.94, no.6B paper 2002 ground condition Carver and others, 2004 Denali fault surface rupture Carver, G.A. Plafker, George Metz, Mike Cluff, Lloyd Bemis, Sean Roddick, Jim Redington, Julie Sorensen, Steve 2006 conference proceedings Alaska American Geophysical Union Chapman Conference on Active Tectonics and Seismic Potential of Alaska, May 11-14, 2006 paper 2006 publication date Carver and others, 2006 eastern Northern Foothills fold and thrust belt Matmon, Ari Schwartz, D.P. Haeussler, P.J. Finkel, Robert Lienkaemper, J.J. Stenner, H.D. Dawson, T.E. 2006 journal article Geology v.34, no.8 p.645-648 paper 2006 publication date Matmon and others, 2006 Denali slip rates, central Alaska kinematics Page, R.A. Plafker, George Pulpan, Hans 1995 journal article Geology v.23, no.7 p.629-632 paper 1995 publication date Page and others, 1995 block rotation in east-central Alaska Plafker, George Gilpin, L.M. Lahr, J.C. 1994 book chapter scale 1:2,500,000 Plafker, George Berg, H.C. 1994 document DNAG v.G-1 Boulder, CO Geological Society of America editors 12 plates paper 1994 publication date Plafker and others, 1994 Neotectonic map of Alaska Reger, R.D. Stevens, D.S.P. Solie, D.N. 2008 map Preliminary Interpretive Report PIR 2008-3a Fairbanks, AK Alaska Division of Geological & Geophysical Surveys 2 sheets, scale 1:63,360 digital database file 2008 publication date Reger and others, 2008 surficial geology map Initial reconnaissance - an initial interpretation of stereo air photos, remote sensed images, DEM's, 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 fixed wing and 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. Bemis and Wallace, 2007 Bemis thesis, 2004 Bemis, Weldon & Burns, 2005 Burns, 2006 Carver and others, 2004 Carver and others, 2006 Matmon and others, 2006 Page and others, 1995 Plafker and others, 1994 Reger and others, 2008 2007 Fieldwork - In July-August 2007, 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 2007 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. 2007 Labwork - The radiocarbon samples were carefully extracted to minimize contamination. Samples were stored in the field in aluminum foil bindles 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. 2007 Metadata creation - Metadata were assembled by D.N. Solie to FGDC Standards using Metavist 1.2, DGGS 7.05, a data entry program for FGDC metadata with XML output. 2008 Universal Transverse Mercator 6 0.9996 -147.00000 0 500000.0 0 coordinate pair 0.0005 0.0005 meters UTM North American Datum of 1927 Clarke 1866 6378206.4 294.978698 Table1_coordinates Table1_coordinates.csv Geographic coordinates for trenches, core site and profiles Alaska Division of Geological & Geophysical Surveys Name Name of the trench, core site or profile Alaska Division of Geological & Geophysical Surveys Name of the trench, core site or profile Latitude Latitude of trench, core site or profile, NAD 27 Alaska datum. Alaska Division of Geological & Geophysical Surveys 63.6067 63.8421 degrees Longitude Longitude of trench, core site or profile, NAD 27 Alaska datum Alaska Division of Geological & Geophysical Surveys -145.4560 -143.9254 degrees UTM E NAD 27 Easting in UTM zone 6 or 7, NAD 27, Clark 1866 Alaska Division of Geological & Geophysical Surveys 351570 638523 meters UTM N NAD 27 Northing in UTM, zone 6 or 7, NAD 27, Clark 1866 Alaska Division of Geological & Geophysical Surveys 7057887 7080146 meters UTM Zone UTM zone in which trench, core site or profile is located Alaska Division of Geological & Geophysical Surveys 6 7 zone USGS quadrangle 1:63,360 USGS quadrangle in which trench, core site or profile is located Alaska Division of Geological & Geophysical Surveys 1:63,360 USGS quadrangle in the Mount Hayes or Tanacross quadrangles. Appendix1_14C_ages Appendix1_14C_ages.csv Analytical results for radiocarbon samples Alaska Division of Geological & Geophysical Surveys and Beta Analytic Inc. Site Name of the trench, core site or profile Alaska Division of Geological & Geophysical Surveys Name of the trench, core site or profile Sample Number 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. Alaska Division of Geological & Geophysical Surveys Unique sample number given to each radiocarbon sample analyzed. Location Location of sample within trench wall, as shown on gridded trench log, or in core. Alaska Division of Geological & Geophysical Surveys Description of location of each sample based on trench log. Sample Material Type of carbon material dated Alaska Division of Geological & Geophysical Surveys Type of carbon analyzed (ie, detrital charcoal, peaty material, wood, charcoal). Paleoseismic Significance Purpose for obtaining the age date; what constraints on timing the age imparts Alaska Division of Geological & Geophysical Surveys Paleoseismic event or timing constrained by age date. Lab Number Unique identifying sample number assigned by the laboratory at Beta Analytic Inc. Beta Analytic Inc. Unique sample identifying numbers, preceded by "Beta" (eg, Beta-235569) Lab_Age_BP Radiocarbon years before present, ("present" being 1950). Quoted errors represent 1 standard deviation statistics. Alaska Division of Geological & Geophysical Surveys and Beta Analytic Inc. 10 8690 years 13C/12C Measured ratio of 13C to 12C, calculated relative to the PCB-1 international standard. Alaska Division of Geological & Geophysical Surveys and Beta Analytic Inc. -28.2 -23.5 0/00 Cal BP Radiocarbon age calibrated to calendar years using the OxCal v4.0 calibration program and teh IntCal 04 calibration curve. Ages reported as calibrated 2 sigma ranges before present. Alaska Division of Geological & Geophysical Surveys and Beta Analytic In. 0 12,870 years State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Natural Resource Technician mailing and physical

3354 College Road

Fairbanks AK 99709-3707 USA 907-451-5020 None available. 907-451-5050 dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays Please view our Web site (http://www.dggs.dnr.state.ak.us) for the latest information on available data. Please contact us using the e-mail address provided above when possible. Preliminary Interpretive Report PIR 2008-3D 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. 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. Printed publication can be purchased for $4, (contact information below) plus shipping if mailed. PDF 1.6 No compression applied http://www.dggs.dnr.state.ak.us/pubs/pubs.jsp CSV 2008 No compression applied CD-ROM Joliet Digital files on CD-ROM 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. Order by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Two weeks unless special arrangements are made and an express fee is paid. 20080930 State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Metadata Manager mailing and physical address

3354 College Road

Fairbanks AK 99709-3707 USA 907-451-5039 907-451-5050 dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays. Please contact us through the e-mail address above whenever possible. FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 none 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.