Ray J. Weldon II December 2002 vector digital data U.S. Geological Survey Open-File Report 02-301 USGS U.S. Geological Survey Open-File Report 02-301 \\GISMONKEY\mccrory\metadata\new_e00s\orqfaults_lam \\GISMONKEY\mccrory\metadata\new_e00s\orqfaults_lam orqfaults_lam This publication updates previous fault maps of Oregon as a contribution to the larger U.S. Geological Survey effort to produce digital maps of active faults in the Pacific Northwest region. The new map is derived from the 1992 fault map of Pezzopane, Nakata, and Weldon that has seen wide distribution and has been reproduced in essentially all subsequent compilations of active faults of Oregon. This publication provides a substantial update of known active or suspected active faults east of the Cascades. Improvements in the new map include (1) many newly recognized active faults, (2) a linked ArcInfo map and reference database, (3) more precise locations for previously recognized faults on shaded relief quadrangles generated from USGS 30-m digital elevations models (DEM), (4) more uniform coverage resulting in more consistent grouping of the ages of active faults, and (5) a new category of "possibly" active faults that share characteristics with known active faults, but have not been studied adequately to assess their activity. The distribution of active faults has not changed substantially from the original Pezzopane, Nakata and Weldon map. Most faults occur in the south-central Basin and Range tectonic province that is located in the backarc portion of the Cascadia subduction margin. These faults occur in zones consisting of numerous short faults with similar rates, ages, and styles of movement. Many active faults strongly correlate with the most active volcanic centers of Oregon, including Newberry Craters and Crater Lake. Update the active fault map and database for central and eastern Oregon as a contribution to the larger U.S. Geological Survey effort to produce digital maps of active faults in the Pacific Northwest region. The new map attempts to rectify a number of shortcomings in the original 1:500,000-scale map of Pezzopane (1993) and to add fault data acquired during subsequent investigations. en 1995 2001 REQUIRED: The year (and optionally month, or month and day) for which the data set corresponds to the ground. publication date Complete Irregular -122.719237 -116.815360 46.046898 41.944830 228150.078125685447.68750027636.744141477436.500000 None faults None Central and Eastern Oregon Quaternary none none Ray J. Weldon II Dept. of Geological Sciences, University of Oregon Professor of Geology mailing address

Dept. of Geological Sciences, University of Oregon

Eugene Oregon 97403-1272 USA 541-346-4584 541-346-4692 ray@newberry.uoregon.edu Secondary Contact: Patricia A. McCrory U.S. Geological Survey Research Geologist mailing address U.S.Geological Survey 345 Middlefield Road Menlo Park California 94025 USA 650-329-5677 650-329-5163 pmccrory@usgs.gov Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 8.3.0.800 ArcInfo Coverage A literature search was undertaken to update the catalog of active faults in central and eastern Oregon. Those studies published in the past decade are listed in the references (see 'Read-Me' file) and in the ArcInfo database as attributes to the fault traces. The ArcInfo database is linked to the 1:100,000 map sheets where individual fault traces are keyed to the references that provide the line(s) of evidence for their assigned activity. To determine which faults were redrawn and which were simply compiled from a pre-existing digital database, one must also access the ArcInfo database, select the fault, and read its attributes. Faults taken from the digital State Geologic map (digital version of ref#8) were copied from 1:500,000 coverage, all other fault traces were drawn onto 1:100,000 hill shade printouts of the DEM using 1:35,000 to 1:250,000 scale maps and air photos as reference. Metadata imported.E:\temp\orqfaults_dd.xml2003040714580900 Vector Complete chain 3912 Point 4 SimpleArcFALSE3912FALSEFALSESimpleTicFALSE4FALSEFALSE North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 GCS_North_American_1983NAD_1983_Lambert_Conformal_Coniccoordinate pairmeters0.0004260.000426Lambert Conformal Conic43.00000045.500000-120.50000041.750000400000.0000000.000000 orqfaults_lam.aat Feature Class3912 FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. FIDOID400 Shape Feature geometry. ESRI Coordinates defining the features. ShapeGeometry000 FNODE# Internal node number for the beginning of an arc (from-node). ESRI Whole numbers that are automatically generated. 45Binary TNODE# Internal node number for the end of an arc (to-node). ESRI Whole numbers that are automatically generated. 45Binary LPOLY# Internal node number for the left polygon. ESRI Whole numbers that are automatically generated. 45Binary RPOLY# Internal node number for the right polygon. ESRI Whole numbers that are automatically generated. 45Binary LENGTH Length of feature in internal units. ESRI Positive real numbers that are automatically generated. 48Float3 ORQFAULTS_LAM# Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. 45Binary ORQFAULTS_LAM-ID User-defined feature number. ESRI 45Binary LENGTH_METERS 48Float3 FAULT_ID 45Binary COMMENT 6416Character REFERENCE 6416Character ACTIVITY_CODE 45Binary DIP 504Character FAULT_SYMBOL 5016Character DIP FAULT_SYMBOL Downloadable Data 1.487 1.487 20030407 J. Luke Blair USGS Menlo Park GIS Manager, Earthquake Hazards Team office

345 Middlefield Rd Mail Stop 977

Menlo Park CA 94025 USA 650-329-4707 lblair@usgs.gov 9-5 PST REQUIRED: The person responsible for the metadata information.REQUIRED: The organization responsible for the metadata information. FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile enhttp://www.esri.com/metadata/esriprof80.htmlESRI Metadata Profile {183F4B87-10DC-4B0A-AA1B-7F69672DB5F0}2003040714580900FALSE20030407145947002003040714594700Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 8.3.0.800orqfaults_lam228150.078125685447.6875477436.527636.7441411-122.719237-116.8153646.04689841.944831ISO 19115 Geographic Information - MetadataDIS_ESRI1.0dataset002file://\\GISMONKEY\mccrory\metadata\new_e00s\orqfaults_lamLocal Area Network1.487ArcInfo CoverageNAD_1983_Lambert_Conformal_Conic3912420030407