Identification_Information: Citation: Citation_Information: Originator: Emily M. Taylor Originator: Donald S. Sweetkind Publication_Date: 2014 Title: Quaternary Geologic Map of the North-Central Part of the Salinas River Valley and Arroyo Seco, Monterey County, California Edition: version 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Scientific Investigations Map Issue_Identification: SIM 3260 Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Online_Linkage: http://dx.doi.org/10.3133/sim3260 Description: Abstract: Arroyo Seco, a perennial drainage in the central Coast Range of California, records a sequence of strath terraces. These terraces preserve an erosional and depositional history, primarily controlled by regional climate changes. These deposits have been mapped and correlated on the basis of field investigations, digital terrain analysis, stream gradient profiles, evaluation of published regional soil maps, and satellite imagery. Seven of the strath terraces and associated alluvial fans have been dated by Optically Stimulated Luminescence (OSL) or Infrared Stimulated Luminescence (IRSL). OSL and IRSL dates on seven of the strath terraces and associated alluvial fans in Arroyo Seco are approximately >120 ka, >65 ka, 51-46 ka, 35 ka, 9 ka, and 2-1 ka. These dates generally fall within the range of ages reported from the Transverse Ranges, which have a similar climate to that of Arroyo Seco. Purpose: The maps are intended as a database for a variety of land-use and scientific purposes, including (1) assessment of geologically stable building sites, (2) planning for road and highway construction, (3) assessment of groundwater resources, (4) assessment of mineral resources, (5) determining geologic-hazard potential (flooding, landslide, rockfall, and seismic risk), (6) evaluating the structure of the northern Salinas River valley, (7) improvement in understanding of the sedimentary section, which spans the period from the Paleozoic to the Holocene, and (8) new insights into the geologic history of the strath terraces in Arroyo Seco, including a number of new radiometric dates. Supplemental_Information: FEATURE CLASSES INCLUDED IN THIS GEOSPATIAL DATABASE: GEOLOGY Feature Dataset: ArroyoSeco_line - linear polyline features (contacts, faults) ArroyoSeco_poly - geologic unit polygons ArroyoSeco_label - polygon labels (attributes) ArroyoSeco_OSLsample - OSL and IRSL sample sites ArroyoSeco_inset_map_boundary - boundary of inset map RASTER FILES: ArroyoSeco_hillshd.tif ArroyoSeco_hillshd.tfw ArroyoSeco_topo.tif ArroyoSeco_topo.tfw Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2013 Currentness_Reference: 2013 Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -121.50 East_Bounding_Coordinate: -121.125 North_Bounding_Coordinate: 36.375 South_Bounding_Coordinate: 36.125 Keywords: Theme: Theme_Keyword_Thesaurus: AGI Glossary of Geology Theme_Keyword: Quaternary Theme_Keyword: strath terraces Theme_Keyword: alluvial deposits Theme_Keyword: fan deposits Theme_Keyword: Paso Robles Formation Theme_Keyword: paleovalley Place: Place_Keyword_Thesaurus: U.S. Board on Geographic Names (BGN) Place_Keyword: USA Place_Keyword: California Place_Keyword: Central Coast Place_Keyword: Monterey County Place_Keyword: Salinas River valley Place_Keyword: Arroyo Seco Temporal: Temporal_Keyword_Thesaurus: International Commission on Stratigraphy Temporal_Keyword: Cenozoic Temporal_Keyword: Quaternary Access_Constraints: none Use_Constraints: Users of this geospatial database and geologic information derived there from should acknowledge the U.S. Geological Survey as the source of the data. Although software enables a user to display images at various scales, map data in this report should not be used at scales greater that 1:15,000. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Emily M. Taylor Contact_Organization: U.S. Geological Survey, Geosciences and Environmental Change, Denver, Colorado Contact_Position: Project Geologist Contact_Address: Address_Type: mailing address Address: USGS, MS 980, Box 25046, Denver Federal Center City: Denver State_or_Province: Colorado Postal_Code: 80225 Contact_Voice_Telephone: 303-236-8253 Contact_Facsimile_Telephone: 303-236-5349 Contact_Electronic_Mail_Address: emtaylor@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/sim/3260/downloads/sim3260_map.pdf/ Browse_Graphic_File_Description: Graphical representation of the map Browse_Graphic_File_Type: pdf Data_Set_Credit: Technical reviews by Lew Rosenberg and Marith C. Reheis led to significant improvements that eventually were reflected in aspects of the database, the plot file, and in the discussion of the regional geologic framework and the description of the geologic units of the north-central part of the Salinas River valley and Arroyo Seco in Monterey County, California. Digital review by Paco VanSistine. Geologic mapping and digital preparation of this report were sponsored by the National Cooperative Geologic Mapping Program of the U.S. Geological Survey. Native_Data_Set_Environment: Microsoft Windows Version 7. ArcMap/ArcInfo version 10.0 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Data were entered and checked by the geologist that made the field observations. The attributes of this geospatial data set consist of text identifiers and numeric codes that indicate the identity of the geologic unit or type of geologic feature, and determine how each feature is colored or symbolized. To check attribute accuracy, a color check plot was visually compared to the geologist's original compilation. Discrepancies between the digital geospatial dataset and the original analog or digital compilation were corrected as needed. Machine-created listings of unique attribute values were used to identify spelling errors or other inconsistencies, and corrections were made as needed. Logical_Consistency_Report: Map elements were visually checked for overshoots, undershoots, duplicate features, polygon closure, and other errors by the author and by the GIS technician(s) that created the digital database. Automated routines were also used to check the databases for polygon label errors, line or point attribution errors, sliver polygons, dangling arcs, intersection errors, and projection information. Check plots of the map were reviewed by at least two other geologists for consistency with basic geologic principles and general conformity to USGS mapping standards. Completeness_Report: Data are complete: no features that could be accurately represented at the compilation scale of 1:50,000 were eliminated or generalized. The smallest area represented is approximately 110 square meters. All geospatial database elements are attributed. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Most digitized positions on the map that depict distinct contacts between rock formations in the field are estimated to be within 20 m of the actual contact on the land in most instances. Boundaries (lines) between Quaternary units (for example, alluvial fans) that correspond closely to distinct edges of landforms (for example, river terraces) are of comparable accuracy. Boundaries (lines) between some Quaternary units, such as eolian deposits and broad alluvial aprons, are approximately located within an indefinite gradational zone between them. Horizontal positional accuracy is tested by visual comparison of hard copy test plots to source maps or comparing locations of data on a computer monitor to other data layers in the same geographic area. The database contains elevation data. Accuracy of these digital data indirectly depends on accuracy of the base maps on which the original source geologic maps were compiled. These base maps were made by the U.S. Geological Survey, which routinely checks them for compliance with the National Map Accuracy Standards. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: United States Department of Agriculture, Natural Resources Conservation Service Title: Spatial and tabular data of the Soil Survey for Monterey County, California Publication_Date: 2010 Geospatial_Data_Presentation_Form: Tabular digital data and vector digital data Publication_Information: Publication_Place: Fort Worth, Texas Publisher: Soil Survey Staff, Natural Resources Conservation Service, United States Department of Agriculture. Web Soil Survey. Online_Linkage: http://websoilsurvey.nrcs.usda.gov/ OR http://datagateway.nrcs.usda.gov/GDGOrder.aspx, Go to California, Monterey County, Soils, Soil Survey Spatial and Tabular Data (SSURGO 2.2), 2 maps 50.291 MB Type_of_Source_Media: digital Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2010 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: USDA (2010) Source_Contribution: geologic content Source_Information: Source_Citation: Citation_Information: Originator: Durham, D.L. Title: Geology of the Reliz Canyon, Thompson Canyon, and San Lucas quadrangles, Monterey County, California Publication_Date: 1963 Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 1141-Q Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1963 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Durham (1963) Source_Contribution: geologic content Source_Information: Source_Citation: Citation_Information: Originator: Durham, D.L. Title: Geology of the Sycamore Flat and Paraiso Springs quadrangles, Monterey County, California Publication_Date: 1970 Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: 1285 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1970 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Durham (1970) Source_Contribution: geologic content Source_Information: Source_Citation: Citation_Information: Originator: Durham, D.L Title: Geology of the southern Salinas Valley area, California Publication_Date: 1974 Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 819 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1974 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Durham (1974) Source_Contribution: geologic content Source_Information: Source_Citation: Citation_Information: Originator: Snetsinger, K.G. Title: Late Tertiary and Quaternary history of the lower Arroyo Seco area, Monterey County, California Publication_Date: 1962 Series_Information: Series_Name: Palo Alto, CA, Stanford University, unpub. M.S. thesis Issue_Identification: unknown Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1962 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Snetsinger (1962) Source_Contribution: geologic content Process_Step: Process_Description: Geology was mapped during the period 2010 to 2012. Process_Date: 2012 Process_Step: Process_Description: Geologic polygon, line, and point features were attributed and revised in ArcInfo. Process_Date: 2010-2012 Process_Step: Process_Description: Metadata created by Emily Taylor. Process_Date: 2013 Process_Step: Process_Description: The database files, metadata, and check plots were edited by the USGS Science Publishing Network, and revisions made to the geospatial database as needed. Process_Date: 2012-2013 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: 0.99960000 Longitude_of_Central_Meridian: -123.00000000 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: 0.0001 Ordinate_Resolution: 0.0001 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: FEATURE CLASSES IN THIS DATABASE: ArroyoSeco_lines - linear polyline features (contacts, faults) ArroyoSeco_poly - geologic unit polygons ArroyoSeco_label - polygon labels (attributes) ArroyoSeco_flat_locations - location of flattest relief in polygon (attribute) ArroyoSeco_OSLsample - OSL and IRSL sample sites ArroyoSeco_inset_map_boundary - boundary of inset Arroyo Seco Map (contact) FEATURE ATTRIBUTES: field - name, Name of the faults. Contacts and a few faults are "unnamed". Name Paloma Fault Arroyo Seco Bear Canyon Coleman Junipero Serra Lucia Reliz Rinconada unnamed Vaqueros Willow Creek field - Source, Source for the named faults. Source Durham (1970) Dibblee (2006a) Dibblee (2006b) Dibblee (2006c) Dibblee (2006d) Dibblee (2006e) Dibblee (2007) Seiders and others (1983) Snetsinger (1962) Tinsley (1975) this publication field - age, Age of the fault if known. age Late Quaternary Pre-Quaternary Quaternary undifferentiated no data field - description, Description of the contact or faults. Description contact - certain same fields as field - Map_unit, Geologic map unit name field - description, Description of geologic map unit field - terrace_number, Ordered sequence from oldest (1) to youngest (20) geologic unit. Latest Holocene eroded cut banks (cb) are 999. Bedrock units are greater than 20. field - age, Geologic age Map_unit description terrace_number age Water waterbody 0 Qcb Cut bank 999 latest Holocene Qfr2 Fluvial and minor eolian deposits 20 latest Holocene Qfr1 Fluvial deposit 19 latest Holocene Qfy2 Fluvial deposit 18 late Holocene Qfy1 Fluvial deposit 17 late Holocene Qfay Fluvial and alluvial deposits 16 middle to early Holocene Qfai4 Fluvial and alluvial deposits 15 latest late Pleistocene Qfai3 Fluvial and alluvial deposits 14 latest late Pleistocene Qei Eolian deposits 13 latest late Pleistocene Qfai2y Fluvial and alluvial deposits 12 latest late Pleistocene Qfai2o Fluvial and alluvial deposits 11 latest late Pleistocene Qfai1 Fluvial and alluvial deposits 10 early late Pleistocene Qao Alluvial deposits 9 late middle Pleistocene Qfo8 Fluvial deposits 8 middle to early Pleistocene Qfo7 Fluvial deposits 7 middle to early Pleistocene Qfo6 Fluvial deposits 6 middle to early Pleistocene Qfo5 Fluvial deposits 5 middle to early Pleistocene Qfo4 Fluvial deposits 4 middle to early Pleistocene Qfo3 Fluvial deposits 3 middle to early Pleistocene Qfo2 Fluvial deposits 2 middle to early Pleistocene Qfo1 Fluvial deposits 1 middle to early Pleistocene QTpr Paso Robles Formation 35 middle Pleistocene to Pliocene Tsa Shallow near-shore marine 40 Pliocene regressive sediments Tpr Pancho Rico Formation 45 Pliocene to Miocene Tms Tertiary marine sediments 50 Miocene to Paleocene MzPzub Undifferentiated Basement 55 Mesozoic to Paleozoic field - drainage_sys, The drainage system that the residual, erosional, or depositional surface is associated with. Bedrock units are not associated with specific drainage systems. drainage_system Arroyo Seco terrace Arroyo Seco terrace (residual) on QTpr Arroyo Seco terrace on QTpr cut bank paleoerosional surface QTpr QTpr Reliz terrace Reliz terrace (residual) on QTpr Reliz terrace on QTpr Salinas terrace Salinas terrace (residual) on QTpr Salinas terrace of Tms Salinas terrace on QTpr Tms Tpr Tsa Tsa Reliz Undifferentiated Basement water field - soil_name, Natural Resources Conservation Service, USDA soil classification field - soil, Natural Resources Conservation Service, USDA abbreviation of soil name field - soil_group, Simplified alluvial soil groups field - Bt_hz_k, Thickness in cm of the Bt horizon with the maximum percentage of clay field - MaxClay, Percent of clay in the maximally developed B horizon field - landform, The landform that the soil is typically associated soil_name soil_group Bt_hz_k MaxClay landform Alo Aa 0 55 residual on sedimentary rocks Arroyo Seco As, Av 0 0 alluvial fans, alluvial plains Badland Ba 0 0 badland Chamise Ca 48 55 terraces Chualar Cb 53 25 alluvial fans, terraces Cieneba Cc, Cd, Ce 0 18 residual on igneous and metamorphic rocks Cropley Cn 0 60 alluvial fans, terraces Diablo Dd 0 60 residual on sedimentary rocks Dune land Df 0 0 sand dune Elder Ea, Eb, Ec 0 18 alluvial fans, alluvial plains Fluvents Fa 0 5 flood plains Garey Gb, Gc 76 15 eolian sand dune Gaviota Gd, Ge 0 18 residual on sedimentary rocks Gazos Gf 0 27 residual on sedimentary rocks Gloria Gh 41 60 alluvial fans, terraces Gorgonio Gk 0 15 alluvial fans, terraces Haire Ha 61 60 residual on sedimentary rocks Linne La, Lb, Lc 0 35 residual on sedimentary rocks Lockwood Ld, Le 102 35 alluvial fans, terraces Lopez Lh 0 27 residual on shale Los Osos Lm 28 50 residual on sedimentary rocks McCoy Ma, Mb 46 35 residual on granitic rocks Metz Me, Mf 0 35 alluvial fans, alluvial plains Mocho Mn, Mo 0 35 alluvial fans, alluvial plains Nacimiento Na 0 35 residual on sedimentary rocks Pico Mg, Pf 0 35 alluvial fans, alluvial plains Placentia Pn, Po 33 50 alluvial fans, terraces Psamments Ps, Pr 0 10 flood plains Rincon Ra 36 45 alluvial fans, terraces Salinas Sb 0 35 alluvial fans, terraces Santa Lucia Sf 0 35 residual on shale Santa Lucia, Reliz, Lopez complex Sg 0 30 hills, uplands Shedd SmG 0 35 hills, uplands Sheridan So 0 18 hills, uplands Sur, Junipero complex Ss 0 19 hills, uplands Tujunga Tb 0 5 alluvial fans, alluvial plains Vista Va, Vb 0 15 hills, uplands Xerorthents Xb, Xd 0 35 cut bank field - Map_unit, Geologic map unit name that location falls within field - soil, NRCS soil name that location falls within field - FLAT_Y Northing coordinate of flattest spot in polygon field - FLAT_X Easting coordinate of flattest spot in polygon field - FLAT_Z Elevation in meters of flattest spot in polygon field - SampleID, Lab and field identification number field - soil, Abbreviation of soil name sampled field - Map_Unit, Geologic map unit name sampled field - notes, Notes on field location field - point_X - sample location, easting field - point_Y - sample location, northing field - Z - sample location, elevation (meters) field - OSL_IRSL_Age, OSL or IRSL age of sample in years Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: USGS Information Services, Box 25286, DFC City: Denver State_or_Province: Colorado Postal_Code: 80225-0046 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Resource_Description: Scientific Investigations Map SIM 3260 Distribution_Liability: This database, identified as SIM 3260, has been approved for release and publication by the Director of the 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. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items for other than personal use must be secured from the copyright owner. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ArcGIS Geodatabase, ArcView Shapefile Format_Version_Number: Arc 10.2 File_Decompression_Technique: GZIP compressed TAR file (Unix), ZIP archive (Windows) Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/sim/3260 Fees: none Metadata_Reference_Information: Metadata_Date: 03012013 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Emily M. Taylor Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: Denver Federal Center Address: MS 980 City: Denver State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-236-8253 Contact_Facsimile_Telephone: 303-236-5349 Contact_Electronic_Mail_Address: emtaylor@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: none Metadata_Use_Constraints: none Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile