Metadata: Identification_Information: Citation: Citation_Information: Originator: Janet T. Watt Publication_Date: 2015 Title: Offshore geology and geomorphology -- Point San Luis map area [sheet 5] Geospatial_Data_Presentation_Form: vector digital data Larger_Work_Citation: Citation_Information: Originator: Janet T. Watt Originator: Samuel Y. Johnson Originator: Stephen R. Hartwell Originator: Michelle Roberts Publication_Date: 2015 Title: Offshore Geology and Geomorphology from Point Piedras Blancas to Pismo Beach, San Luis Obispo and Santa Barbara Counties, California Geospatial_Data_Presentation_Form: Raster digital data; map Series_Information: Series_Name: Scientific Investigations Map Issue_Identification: SIM 3327 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: http://dx.doi.org/10.3133/sim3327 Online_Linkage: http://pubs.usgs.gov/sim/3327/ Description: Abstract: This part of SIM 3327 presents data for geologic units on the offshore geologic and geomorphic map of the Point San Luis map area, in the vicinity of Pismo Beach, California. The vector data file included in "Geology_PointSanLuis.zip," which is accessible from http://pubs.usgs.gov/sim/3327/data/sim3327_data_catalog.html. Offshore geologic units were delineated on the basis of integrated analysis of adjacent onshore geology (see “Additional References for Onshore Geologic Mapping” list), seafloor-sediment and rock samples (Reid and others, 2006; Pacific Gas and Electric Company, 2011), multibeam bathymetry and backscatter imagery, magnetic data (Langenheim and others, 2009, 2012; Sliter and others, 2009), and high-resolution seismic-reflection profiles (Sliter and others, 2009). To maintain onshore-to-offshore consistency, map-unit symbols for the Mesozoic and Tertiary units reflect the published onshore-mapping usage. If no onshore-equivalent unit exists, as is the case with the Quaternary units, the map-unit symbols are made up of letters that indicate the following: the Period, usually followed by “m” for marine sediment; the predominant sediment type; and, finally, a geomorphic descriptor, if applicable. Nearshore and inner shelf deposits are predominantly sand (Qms), as determined by seafloor sampling (Reid and others, 2006). These sandy-shelf areas locally include coarser grained units such as channel deposits (Qmc), rills (Qmr), and sorted bedforms (Qmss, Trembanis and Hume, 2011). Unit Qmss typically exists as erosional lags in scour depressions whose contacts with horizontal sand sheets of unit Qms are usually relatively sharp but, less commonly, are diffuse. These scour depressions, which generally form irregular to lenticular exposures that have abrupt landward contacts with bedrock, typically are a few tens of centimeters deep and range in size from a few tens of meters to more than 1 km2. Such scour depressions are common along this stretch of the California coast (see, for example, Cacchione and others, 1984; Hallenbeck and others, 2012), where offshore sandy sediment is relatively thin (and, thus, is unable to fill the depressions) owing to low sediment supply and also to erosion and transport of sediment during large northwest winter swells. Inner shelf deposits (predominantly sand) grade to finer grained (mud and sand) outer shelf (Qmsf) and slope (Qmsl) deposits at depths greater than 70 m. The boundary between units Qms and Qmsf was determined on the basis of seafloor-sediment samples (Reid and others, 2006), as well as interpretation of multibeam backscatter imagery. This boundary likely shifts seaward or landward as a result of seasonal- to annual- to decadal-scale cycles in sediment supply, sediment transport, and wave climate. These shelf and slope deposits locally contain pockmarks (Qmp), hummocky relief (Qmsh), and landslide deposits (Qls). Landslide deposits may represent various forms of submarine sediment instabilities, including slumps, slides, and collapse depressions. Where an older unit (typically bedrock) is overlain by a thin (less than 2 m) Quaternary deposit, a composite geologic unit is mapped; the composite unit, shown with a stipple pattern on the older unit, is designated by a composite label indicating both the overlying sediment cover and the lower (older) unit, separated by a slash (/). For example, Qms/Tus indicates that a thin sheet of Qms overlies Tus. Such units are recognized on the basis of high backscatter, low relief, continuity with moderate- to high-relief bedrock outcrops, and (in most cases) high-resolution seismic-reflection data. The overlying sediment is interpreted as an ephemeral layer that may or may not be continuously present, depending on storms, seasonal and (or) annual patterns of sediment movement, or longer term climate cycles. Sea level was approximately 120 to 130 m lower during the Last Glacial Maximum (about 21 ka; see, for example, Lambeck and Chappell, 2001; Gornitz, 2009). This approximate depth corresponds to the modern shelf break, a lateral change from the gently dipping (0.8° to 1.0°) outer shelf to the slightly more steeply dipping (about 1.5° to 2.5°) upper slope in the central and northern parts of the map area. South of Point San Luis in San Luis Bay (sheets 5, 6), deltaic deposits offshore of the mouth of the Santa Maria River (11 km south of the map area) have prograded across the shelf break and now form a continuous low-angle (about 0.8°) ramp that extends to water depths of more than 160 m. The shelf break defines the landward boundary of slope deposits (Qmsl). North of Estero Bay, the shelf break is characterized by a distinctly sharp slope break that is mapped as a landslide headscarp above landslide deposits (Qls) (sheets 1, 2). Multibeam imagery and seismic-reflection profiles across this part of the shelf break show evidence of slope failure, such as slumping, sliding, and soft-sediment deformation, along the entire length of the scarp. Notably, this shelf-break scarp corresponds to a west splay of the Hosgri Fault that dies out just north of the scarp, suggesting that faulting is controlling the location (and instability) of the shelf break in this area. Lithologies of Tertiary and older seafloor bedrock units were determined on the basis of seafloor samples where available; otherwise, they were interpreted on the basis of their correlation to onshore geology, using their seafloor texture visible in multibeam imagery in addition to their magnetic character. Tertiary units mapped in the offshore include rocks of the Obispo, Monterey, and Pismo Formations. The rhythmically bedded Monterey and Pismo Formations are characterized by their distinctive seafloor texture in multibeam imagery; in addition, they are relatively nonmagnetic. These rocks are underlain by, or are in fault contact with, Jurassic and Cretaceous basement that consists of rocks of either the two unnamed sandstone units (Ksl, Kslc), an unnamed graywacke unit (KJug), the Franciscan Complex (KJf), or the Coast Range ophiolite (Jo). These older units often are characterized by irregular, lumpy seafloor texture and complex magnetic signatures, owing to the highly deformed nature of the variably magnetic rocks. Certain Mesozoic and Tertiary basement rocks, including ultramafic rocks of the Coast Range ophiolite (Jo) and diabase and basalts of the Obispo Formation (Tod), are highly magnetic, making high-resolution magnetic data (fig. 3 on sheets 2, 4, 6) an important mapping tool. Although metavolcanic rocks within the Franciscan Complex in this map area apparently are not magnetic, serpentinite is. Serpentinite, which is derived from the Coast Range ophiolite and is associated with the Franciscan Complex, commonly forms elongate magnetic bodies along fault zones and, thus, can assist in fault mapping. This map area, which encompasses part of the Los Osos structural domain, lies on the east flank of the offshore Santa Maria Basin (McCulloch, 1987; Lettis and others, 2004), within the broader Pacific–North American plate transform margin. The Los Osos domain is characterized by a series of onshore, northwest-trending, fault-bounded basins and ranges that extend offshore, where they are partly covered by marine sediment and are truncated by the northwest-striking, right-lateral Hosgri Fault. The Hosgri Fault is an approximately 170-km-long (or longer?) right-lateral strike-slip fault (Petersen and others, 2008) that has an inferred Quaternary slip rate of 1 to 3 mm/yr (Hanson and Lettis, 1994; Hanson and others, 2004). The shallow (upper 200 m) structure of the Hosgri Fault, as revealed in high-resolution seismic-reflection data, is a vertical fault zone that offsets the seafloor in numerous locations and that has many bends in strike that result in localized areas of uplift and subsidence. The map on sheet 1 shows the Hosgri Fault as being continuous with the onshore San Simeon Fault, and interpretation of high-resolution seismic-reflection data (tracklines shown in fig. 2 on sheet 2) provides compelling evidence that this is the case (Johnson and Watt, 2012). This interpretation contrasts with previous interpretations (Pacific Gas and Electric Company, 1988; Lettis and others, 1990; Hanson and others, 2004) that showed the Hosgri Fault as ending just north of Point Estero, with slip transferring to the San Simeon Fault through a releasing right step. Note that previous interpretations considered the stepover and associated pull-apart basin to be a barrier to earthquake rupture, and so our detailed mapping indicating that no Hosgri–to–San Simeon stepover exists has important implications for earthquake hazards (for a more detailed discussion, see Johnson and Watt, 2012). Both the Los Osos and Shoreline Faults, which converge with the Hosgri Fault within the map area, are part of a broader fault system within the central Coast Ranges. The Los Osos Fault, as imaged with multibeam and high-resolution seismic-reflection data, forms a west-northwest-striking zone (1 to 3 km wide) of near-vertical faulting. Three distinct strands (north, central, and south) are evident on shallow seismic-reflection profiles. The Shoreline Fault, first recognized as a northwest-striking, vertical zone of earthquake hypocenters that parallels the coastline (Hardebeck, 2010), is expressed on the seafloor as a series of discontinuous, en echelon lineations and scarps visible in multibeam imagery. Detailed marine and airborne (helicopter) magnetic data also reveal a linear trend of magnetic anomalies, the edges of which are coincident with (or parallel to) the surface expression of the Shoreline Fault. Reference cited: Cacchione, D.A., Drake, D.E., Grant, W.D., and Tate, G.B., 1984. Rippled scour depressions of the inner continental shelf off central California: Journal of Sedimentary Petrology, v 54, p. 1280-1291. Gornitz, V., 2009, Sea level change, post-glacial, in Gornitz, V., ed., Encyclopedia of paleoclimatology and ancient environments: Springer, Encyclopedia of Earth Sciences Series, p. 887–893. Hanson, K.L., Lettis, W.R., 1994, Estimated Pleistocene slip rate for the San Simeon fault zone, south-central coastal California, in Seismotectonics of the Central California Coast Ranges, Alterman, I.B., McMullen, R.B., Cluff, L.S., and Slemmons, D.B. (Eds.): Geological Society of America Special Paper 292, p. 133-150. Hanson, K.L., Lettis, W.R., McLaren, M.K., Savage, W.U., and Hall, N.T., 2004, Style and rate of quaternary deformation of the Hosgri fault zone, offshore south-central California, in Evolution of sedimentary basins/offshore oil and gas investigations- Santa Maria Province, Keller, M.A. (Ed.): U.S. Geological Survey Bulletin 1995-BB, 37 p. Hardebeck, J.L., 2010, Seismotectonics and fault structure of the California Central Coast: Bulletin of the Seismological Society of America, v. 100, p. 1031-1050. Johnson, S.Y., and Watt, J.T., 2012, Influence of fault trend, bends, and convergence on shallow structure and geomorphology of the Hosgri strike-slip fault, offshore central California: Geosphere, v. 8, no. 6, 25 p. Lambeck, K., and Chappell, J., 2001, Sea level change through the last glacial cycle: Science, v. 292, p. 679–686, doi: 10.1126/science.1059549. Langenheim, V.E., R.C. Jachens, and K. Moussaoui (2009). Aeromagnetic survey map of the central California Coast Ranges, USGS Open File Rept. 2009-1044, http://pubs.usgs.gov/of/2009/1044/. Lettis, W.R., Hanson, K.L., Unruh, J.R., McLaren, M., and Savage, W.U., 2004, Quaternary tectonic setting of South-Central Coastal California: in, Evolution of sedimentary basins/offshore oil and gas investigations-Santa Maria Province, Keller, M.A. (Ed.): U.S. Geological Survey Bulletin 1995-AA, 24 p. McCulloch, D.S., 1987, Regional geology and hydrocarbon potential of offshore central California, in Scholl, D.W., Grantz, A., and Vedder, J.G., eds., Geology and Resource Potential of the Continental Margin of Western North America and Adjacent Oceans -- Beaufort Sea to Baja California: Houston, Texas, Circum-Pacific Council for Energy and Mineral Resources, Earth Science Series, v. 6., p. 353-401. Pacific Gas and Electric Company, 2011, Report on the analysis of the Shoreline Fault Zone, central coastal California, Report to the U.S. Nuclear Regulatory Commission, http://www.pge.com/myhome/edusafety/systemworks/dcpp/shorelinereport/. Petersen, M.D., Frankel, A.D., Harmsen, S.C., Mueller, C.S., Haller, K.M., Wheeler, R.L., Wesson, R.L., Zeng, ., Boyd, O.S., Perkins, D.M., Luco, N., Field, E.H., Wills, C.J., and Rukstales, K.S., 2008, Documentation for the 2008 update of the United States National Seismic Hazard Maps: U.S. Geological Survey Open-File Report 2008-1128, 61 p. Reid, J.A., Reid, J.M., Jenkins, C.J., Zimmerman, M., Williams, S.J., and Field, M.E., 2006, usSEABED: Pacific Coast (California Oregon, Washington) offshore surficial-sediment data release: U.S. Geological Survey Data Series 182, http://pubs.usgs.gov/ds/2006/182/. Sliter, R.W., Triezenberg, P.J., Hart, P.E., Watt, J.T., Johnson, S.Y., and Scheirer, D.S., 2009, High resolution seismic-reflection and marine magnetic data along the Hosgri fault zone, central California: U.S. Geological Survey 2009-1100, v. 1.1, http://pubs.usgs.gov/of/2009/1100/index.html. Trembanis, A.C., and Hume, T.M., 2011, Sorted bedforms on the inner shelf off northeastern New Zealand—Spatiotemporal relationships and potential paleo-environmental implications: Geo-Marine Letters, v. 31, p. 203–214. Purpose: These data are intended for science researchers, students, policy makers, and the general public. These data can be used with geographic information systems or other software to aid in assessments and mitigation of geologic hazards in the central California coastal region and to provide sufficient geologic information for land-use and land-management decisions both onshore and offshore. Supplemental_Information: 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 Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2015 Currentness_Reference: Publication Date Status: Progress: Complete Maintenance_and_Update_Frequency: none planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -120.998130 East_Bounding_Coordinate: -120.613617 North_Bounding_Coordinate: 35.291089 South_Bounding_Coordinate: 35.072024 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: seafloor Theme_Keyword: geology Theme: Theme_Keyword_Thesaurus: Global Change Master Directory (GCMD) Theme_Keyword: Oceans > Bathymetry/SeafloorTopography > Bathymetry Theme_Keyword: Oceans > Bathymetry/SeafloorTopography > Seafloor Topography Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificinformation Theme_Keyword: environment Theme_Keyword: oceans Theme_Keyword: imageryBaseMapsEarthCover Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Pacific Ocean Place_Keyword: California Place_Keyword: San Simeon Place_Keyword: Point Piedras Blancas Place_Keyword: Pismo Beach Place_Keyword: Cambria Place_Keyword: Cayucos Place_Keyword: Estero Bay Place_Keyword: Morro Bay Place_Keyword: San Luis Obispo Place_Keyword: Point San Luis Access_Constraints: If physical samples or materials are available, constraints on their on-site access are described in "WR CMG Sample Distribution Policy" at URL: http://walrus.wr.usgs.gov/infobank/programs/html/main/sample-dist-policy.html Use_Constraints: This information is not intended for navigational purposes. Read and fully comprehend the metadata prior to data use. Uses of these data should not violate the spatial resolution of the data. Where these data are used in combination with other data of different resolution, the resolution of the combined output will be limited by the lowest resolution of all the data. Acknowledge the U.S. Geological Survey in products derived from these data. Share data products developed using these data with the U.S. Geological Survey. This database 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 this Federal Geographic Data Committee-compliant metadata file is intended to document these data in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS Pacific Coastal & Marine Science Center Contact_Person: Janet Watt Contact_Position: Geologist Contact_Address: Address_Type: physical address Address: 400 Natural Bridges Drive City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Country: USA Contact_Voice_Telephone: (831) 460-7565 Contact_Facsimile_Telephone: (831) 427-4748 Contact_Electronic_Mail_Address: jwatt@usgs.gov Native_Data_Set_Environment: Microsoft Windows Server 2008 R2 Version 6.1 (Build 7601) Service Pack 1?; ESRI ArcGIS 10.0.0.2800 Data_Quality_Information: Logical_Consistency_Report: Map elements were visually checked for overshoots, undershoots, duplicate features, polygon closure, and other errors by the lead authors and by the GIS technician(s) who created the digital database. Review drafts of the map were reviewed internally 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 offshore features that could be accurately identified and represented at the compilation scale of 1:24,000 were eliminated or generalized. The smallest area represented is approximately 100 square meters. All geospatial database elements are attributed. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Polygons were primarily mapped by one of the following methods: (1) interpretation of 2-meter resolution hillshaded bathymetry data from bathymetric lidar and sonar surveys (see CSUMB 2010); (2) interpretation of 2-meter resolution amplitude (backscatter) data from bathymetric sonar surveys (see CSUMB 2010); (3) interpretation of 2-meter slope and curvature derivatives of bathymetry data and (4) interpretation of seismic reflection profile data. Map Unit contact locations were interpreted typically at a scale of between 1:1,000 and 1:2,000 using the above base data. Bathymetric sonar and LiDAR data have a horizontal accuracy greater than the resolution of the base data, while seismic reflection data have a layback component, as well as error introduced by resolution and angle of intersection of mapped features. Consequently, the horizontal accuracy of mapped faults and folds is probably about 10 to 20 meters. Most digitized positions on the map are estimated to have better than 5 m horizontal accuracy. There is no elevation data in the database. 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20090607 Single_Date/Time: Calendar_Date: 20090608 Single_Date/Time: Calendar_Date: 20090609 Single_Date/Time: Calendar_Date: 20090610 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: CSUMB (2009) Source_Contribution: Digital Elevation Model (2 meter resolution) Source_Information: Source_Citation: Citation_Information: Originator: Seafloor Mapping Lab, California State University Monterey Bay Publication_Date: 20091231 Title: cc_bg_2mbthy Geospatial_Data_Presentation_Form: raster digital data Online_Linkage: http://seafloor.csumb.edu/SFMLwebDATA_c.htm#MORRO http://arcims.csumb.edu/DATA_DOWNLOAD/MorroBay.AvilaBay2009/CC_BlkG_2m.5m_bathygrids.zip Type_of_Source_Media: digital file of gridded elevation data (ArcInfo GRID) Source_Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 20090603 Single_Date/Time: Calendar_Date: 20090604 Single_Date/Time: Calendar_Date: 20090605 Single_Date/Time: Calendar_Date: 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20090605 Single_Date/Time: Calendar_Date: 20090606 Single_Date/Time: Calendar_Date: 20090607 Single_Date/Time: Calendar_Date: 20090608 Single_Date/Time: Calendar_Date: 20090609 Single_Date/Time: Calendar_Date: 20090610 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: CSUMB (2009) Source_Contribution: Digital Elevation Model (2 meter resolution) Source_Information: Source_Citation: Citation_Information: Originator: Seafloor Mapping Lab, California State University Monterey Bay Publication_Date: 20091231 Title: cc_bi_2mbthy Geospatial_Data_Presentation_Form: raster digital data Online_Linkage: http://seafloor.csumb.edu/SFMLwebDATA_c.htm#MORRO http://arcims.csumb.edu/DATA_DOWNLOAD/MorroBay.AvilaBay2009/CC_BlkI_2m.5m_bathygrids.zip Type_of_Source_Media: digital file of gridded elevation data (ArcInfo GRID) Source_Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 20090502 Single_Date/Time: Calendar_Date: 20090503 Single_Date/Time: Calendar_Date: 20090504 Single_Date/Time: Calendar_Date: 20090505 Single_Date/Time: Calendar_Date: 20090531 Single_Date/Time: Calendar_Date: 20090601 Single_Date/Time: Calendar_Date: 20090602 Single_Date/Time: Calendar_Date: 20090603 Single_Date/Time: Calendar_Date: 20090604 Single_Date/Time: Calendar_Date: 20090605 Single_Date/Time: Calendar_Date: 20090606 Single_Date/Time: Calendar_Date: 20090607 Single_Date/Time: Calendar_Date: 20090608 Single_Date/Time: Calendar_Date: 20090609 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: CSUMB (2009) Source_Contribution: Digital Elevation Model (2 meter resolution) Source_Information: Source_Citation: Citation_Information: Originator: Seafloor Mapping Lab, California State University Monterey Bay Publication_Date: 20091231 Title: cc_bj_2mbthy Geospatial_Data_Presentation_Form: raster digital data Online_Linkage: http://seafloor.csumb.edu/SFMLwebDATA_c.htm#MORRO http://arcims.csumb.edu/DATA_DOWNLOAD/MorroBay.AvilaBay2009/CC_BlkJ_2m.5m_bathygrids.zip Type_of_Source_Media: digital file of gridded elevation data (ArcInfo GRID) Source_Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 20090502 Single_Date/Time: Calendar_Date: 20090503 Single_Date/Time: Calendar_Date: 20090504 Single_Date/Time: Calendar_Date: 20090505 Single_Date/Time: Calendar_Date: 20090531 Single_Date/Time: Calendar_Date: 20090601 Single_Date/Time: Calendar_Date: 20090602 Single_Date/Time: Calendar_Date: 20090603 Single_Date/Time: Calendar_Date: 20090604 Single_Date/Time: Calendar_Date: 20090605 Single_Date/Time: Calendar_Date: 20090606 Single_Date/Time: Calendar_Date: 20090607 Single_Date/Time: Calendar_Date: 20090608 Single_Date/Time: Calendar_Date: 20090609 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: CSUMB (2009) Source_Contribution: Digital Elevation Model (2 meter resolution) Source_Information: Source_Citation: Citation_Information: Originator: Sliter, Ray W., Triezenberg, Peter J., Hart, Patrick E., Watt, Janet T., Johnson, Samuel Y., and Scheirer, Daniel S., Publication_Date: 2009 Title: High-Resolution Seismic-Reflection and Marine Magnetic Data Along the Hosgri Fault Zone, Central California Geospatial_Data_Presentation_Form: seismic reflection profile section Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 2009-1100 Publication_Information: Publication_Place: Menlo Park, CA Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/of/2009/1100/ Type_of_Source_Media: seismic data files (.sgy files) ASCII lat/long shotpoint files TIFF images of processed seismic lines Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20080610 Ending_Date: 20090808 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Sliter and others, 2009 Source_Contribution: Digital seismic data used to interpret subsurface geologic structure Process_Step: Process_Description: Map Unit polygons were digitized over underlying 2-meter base layers developed from multibeam bathymetry and backscatter data. Derivatives such as slope and curvature were generated from source rasters. Interpreted rasters include amplitude, hillshaded bathymetry (using various illumination angles and vertical exaggeration), slope, and curvature. Curvature was decomposed into profile and plan curvature for analysis purposes. Process_Date: 2009-2012 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 555 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: WGS 1984 UTM Zone 10N Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -123.0 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000100 Ordinate_Resolution: 0.000100 Planar_Distance_Units: Meter Geodetic_Model: Horizontal_Datum_Name: D WGS 1984 Ellipsoid_Name: WGS 1984 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257224 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Geology Entity_Type_Definition: Polygons representing geologic / geomorphic map units Entity_Type_Definition_Source: This report Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: MapUnitAbb Attribute_Definition: Map Unit abbreviation Attribute_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: af? Enumerated_Domain_Value_Definition: Artificial fill (uncertain) Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Jo Enumerated_Domain_Value_Definition: Coast Range ophiolite Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Jo? Enumerated_Domain_Value_Definition: Coast Range ophiolite (uncertain) Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: KJf Enumerated_Domain_Value_Definition: Franciscan Complex Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Kslc Enumerated_Domain_Value_Definition: Unnamed sandstone and interbedded claystone Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qmc Enumerated_Domain_Value_Definition: Marine channel deposits Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qmc? Enumerated_Domain_Value_Definition: Marine channel deposits (uncertain) Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qmp? Enumerated_Domain_Value_Definition: Marine pockmarks (uncertain) Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qmr Enumerated_Domain_Value_Definition: Marine rill (uncertain) Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qms Enumerated_Domain_Value_Definition: Marine nearshore and shelf deposits Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qms/Jo Enumerated_Domain_Value_Definition: Thin (0-4 m) ephemeral layer of marine sediment overlying Coast Range ophiolite Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qms/KJf Enumerated_Domain_Value_Definition: Thin (0-4 m) ephemeral layer of marine sediment overlying Franciscan Complex Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qms/Kslc Enumerated_Domain_Value_Definition: Thin (0-4 m) ephemeral layer of marine sediment overlying unnamed sandstone and interbedded claystone Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qms/Tm Enumerated_Domain_Value_Definition: Thin (0-4 m) ephemeral layer of marine sediment overlying Monterey Formation, undivided Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qms/To Enumerated_Domain_Value_Definition: Thin (0-4 m) ephemeral layer of marine sediment overlying Obispo Formation, undivided Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qmsf Enumerated_Domain_Value_Definition: Fine-grained marine nearshore and shelf deposits Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qmsh Enumerated_Domain_Value_Definition: Marine shelf hummocky deposits Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qmsl Enumerated_Domain_Value_Definition: Marine slope deposits Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qmss Enumerated_Domain_Value_Definition: Marine shelf sorted bedforms Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tm Enumerated_Domain_Value_Definition: Monterey Formation, undivided Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tm? Enumerated_Domain_Value_Definition: Monterey Formation, undivided (uncertain) Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tmpm Enumerated_Domain_Value_Definition: Pismo Formation, Miguelito Member Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tmsch Enumerated_Domain_Value_Definition: Monterey Formation, shale subunit Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: To Enumerated_Domain_Value_Definition: Obispo Formation, undivided Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: To? Enumerated_Domain_Value_Definition: Obispo Formation, undivided (uncertain) Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tod Enumerated_Domain_Value_Definition: Obispo Formation, diabase and basalt subunit Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tor Enumerated_Domain_Value_Definition: Obispo Formation, resistant tuff subunit Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tot Enumerated_Domain_Value_Definition: Obispo Formation, vitric tuff subunit Enumerated_Domain_Value_Definition_Source: This report Attribute: Attribute_Label: UnitType Attribute_Definition: short description of map unit (See Map Unit Abbreviation Definitions) Attribute_Definition_Source: This report Attribute_Domain_Values: Unrepresentable_Domain: text description of map unit Attribute: Attribute_Label: Shape_Area Attribute_Definition: Area of feature in internal units squared. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Coastal and Marine Geology Program Contact_Person: Janet Watt Contact_Address: Address_Type: mailing and physical address Address: 400 Natural Bridges Drive City: Santa Cruz State_or_Province: CA Postal_Code: 95060-5792 Country: US Contact_Voice_Telephone: 831-460-7565 Contact_Facsimile_Telephone: 831-427-4748 Contact_Electronic_Mail_Address: jwatt@usgs.gov Distribution_Liability: This information is not intended for navigational purposes. This database 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. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Metadata_Reference_Information: Metadata_Date: 201301 Metadata_Review_Date: 201201 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Coastal and Marine Geology Program Contact_Person: Steve Hartwell Contact_Address: Address_Type: mailing and physical address Address: 400 Natural Bridges Drive City: Santa Cruz State_or_Province: CA Postal_Code: 95060-5792 Country: US Contact_Voice_Telephone: 831-460-7814 Contact_Facsimile_Telephone: 831-427-4748 Contact_Electronic_Mail_Address: shartwell@usgs.gov Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998