20220608102113001.0TRUETRUE1500000005000FGDCNate CheshierCA Department of Water ResourcesEngineering Geologist(916) 603-6576715 P StreetSacramentoCA95814USNathan.Cheshier@water.ca.gov20240122ArcGIS Metadata1.0Nate CheshierDeparment of Water ResoucesEngineering Geologist(916) 603-6576715 P StreetSacramentoCA95814Nathan.Cheshier@water.ca.govDigital Datai08_FaultLines_SacramentoValley2023-01-01CA Department of Water Resources, Jonathan Mulder, Engineering GeologistCA Department of Water Resources, Nate Cheshier, Engineering Geologistvector digital data<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This data set is a series of polylines denoting fault lines mapped in USGS Publication MF-1790, "Geologic Map of the Late Cenozoic Deposits of the Sacramento Valley and Northern Sierran Foothills, California" (Helley and Harwood,1985). This data set was created by scanning the five- original sheets from USGS Publication MF-1790 (Helley and Harwood, 1985), the five sheets were georeferenced individually and the geologic information was digitized using AutoCAD 2006. The accuracy of the digitized lines was deemed to be within acceptable error tolerances, with the digitized lines accurately matching the original drafted lines in USGS Publication MF-1790 (Helley and Harwood, 1985). In general, the width of the contact lines on the paper copy, accounting for scale, ranged up to about 20 meters (66 feet). During the original digitization, minor topological mistakes (such as identical rock units on both sides of a lithologic contact or unclosed polygons) and omissions (such as unidentified lithologic units) were applied according to the best available knowledge. Comparisons were made between the original mylar and colorized field sheets (as available), in addition to the Geologic Map of the Battle Creek Fault Zone, Northern Sacramento Valley, California (USGS Map MF-1298, 1981), the Geologic Map of the Chico Monocline and Northeastern Part of the Sacramento Valley, California (USGS Miscellaneous Investigations Series Map I-1238, 1981), and the Geologic Map of the Red Bluff 30' X 60' Quadrangle, California (USGS Geologic Investigation Series Map I-2542, 1995). The correlation and description of geologic units were excerpted from USGS Publication MF-1790m (Helley and Harwood, 1985).</SPAN></P></DIV></DIV></DIV>This dataset depicts the distribution of fault lines in the Sacramento Valley as mapped in USGS Publication MF-1790, "Geologic Map of the Late Cenozoic Deposits of the Sacramento Valley and Northern Sierran Foothills, California" (Helley and Harwood,1985). The purpose of this dataset is to make the geologic data published in USGS Publication MF - 1790 (Helley and Harwood, 1985) publicly available, for use in external mapping/GIS applications. The associated data are considered DWR enterprise GIS data, which meet all appropriate requirements of the DWR Spatial Data Standards, specifically the DWR Spatial Data Standard version 3.6, dated September 27, 2023. DWR makes no warranties or guarantees — either expressed or implied — as to the completeness, accuracy, or correctness of the data. DWR neither accepts nor assumes liability arising from or for any incorrect, incomplete, or misleading subject data. The official DWR GIS steward for this data set is Nate Cheshier, who may be contacted at 916-398-1513, or at Nathan.Cheshier@water.ca.gov. Comments, problems, improvements, updates, or suggestions should be forwarded to the official GIS steward as available and appropriate.Department of Water Resources, Northern Region Office, Groundwater and Geological Investigations Section. Originator: Jonathan Mulder. Updates: Nate Cheshier Helley, E.J., and Harwood, D.S., 1985, Geologic map of the late Cenozoic deposits of the Sacramento Valley and northern Sierran foothills, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-1790, 24 p., scale 1:62,500, 5 sheets.Nate CheshierCA Department of Water ResourcesEngineering Geologist(916) 603-6576715 P StreetSacramentoCA95814USNathan.Cheshier@water.ca.govSacramento ValleyCaliforniaISO 19115 Topic CategorygeoscientificInformationGeologyHarwood and HelleyStructural GeologySacramento ValleyFaultsTectonicsDataUnited States Geological SurveyUSGSDepartment of Water ResourcesDWRMapGeographic Information SystemsGISStructural GeologyDWR GIS AtlasGeologyHarwood and HelleyStructural GeologySacramento ValleyFaultsTectonicsDataUnited States Geological SurveyUSGSDepartment of Water ResourcesDWRMapGeographic Information SystemsGISStructural GeologyDWR GIS AtlasSacramento ValleyCalifornia<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>None. Reference should be made to the Department of Water Resources, Northern Region Office, Groundwater and Geological Investigations Section as the originator of this data.</SPAN></P></DIV></DIV></DIV>None.Esri ArcGIS Pro 12.9.3true-122.7511-120.622740.749937.9218The original geologic map was published by the United States Geological Survey in 1985 as Map MF - 1790 (1985). Digitization of MF - 1790 was performed by CA Department of Water Resources Staff from 2007 - 2009. Updates were preformed by CA Department of Water Resources Staff from 2022 - 2023.1985-01-012023-01-01This data set was originally projected in Universal Transverse Mercator (UTM). This data set symbology replicates the United States Geological Survey (USGS) FGDC Digital Cartographic Standard for Geologic Map Symbolization. The standard contains descriptions, examples, cartographic specifications, and notes on usage for a wide variety of symbols that may be used on typical, general-purpose geologic maps and related products.None.The attribute values were compiled to the best of the author's geologic expertise. The attributes were reviewed for any incorrect values or omissions. Minor topological mistakes (such as identical rock units on both sides of a lithologic contact or unclosed polygons) and omissions (such as unidentified lithologic units) have been corrected to the best of the author's geologic expertise. Comparisons were made between the 5-sheet and the original mylar field sheets (as available) in addition to the Geologic Map of the Chico Monocline and Northeastern Part of the Sacramento Valley, California (USGS Miscellaneous Investigations Series Map I-1238) and the Geologic Map of the Red Bluff 30' X 60' Quadrangle, California (USGS Geologic Investigation Series Map I-2542). The Correlation of Map Units, Description of Map Units, Sheet Description, and References were excerpted from USGS Publication MF-1790. References cited in the Description of Map Units can be found in USGS Publication MF-1790.This data set is considered a complete representation of the cited source data. There may be other geological map sources that were not included. The accuracy of the digitized lines is within the accuracy of the originally drafted lines on the paper copy. In general, the width of the contact lines on the paper copy ranges up to about 20 meters (66 feet).The five-sheet set of the original Helley and Harwood map were scanned and georeferencedThe faults and other geologic information were digitized in AutoCAD 2006The digitized map was colored and symbolized in ArcMap 9.0 and updates were made in ArcGIS Pro 3.10i08_FaultLines_SacramentoValleyFeature classProducer DefinedOIDObject IDProducer Defined11044SheetNoHelley and Harwood (1985) map sheet numberProducer Defined<< empty cell >>No DataProducer defined15LineTypeFault line typeProducer DefinedCertainLocation certainProducer definedConcealedLocation concealedProducer definedApproximateLocation approximateProducer definedApproximate queriedLocation concealed and approximateProducer definedNameFault nameProducer Defined<< empty cell >>No DataProducer definedDangleDangleProducer DefinedFaultTypeType of faultProducer DefinedUnknownProducer definedThrustA reverse fault with a dip of 45 degrees 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