Metadata: Identification_Information: Citation: Citation_Information: Originator: Joseph C. Clark Originator: Earl E. Brabb Publication_Date: 1997 Title: Geology of Point Reyes National Seashore and Vicinity, California: A Digital Database Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 97-456 Online_Linkage: http://pubs.usgs.gov/of/1997/of97-456/ Description: Abstract: The Point Reyes Peninsula is a roughly triangular projection of the Marin County coast with an apex at Point Reyes and a base along Tomales Bay and the rift valley of the San Andreas fault zone. This fault zone forms the active tectonic boundary between the Pacific and North American lithospheric plates and here separates Upper Cretaceous granitic and older metamorphic rocks of the Salinian block to the west from Upper Jurassic to Lower Cretaceous graywacke sandstone and melange of the Franciscan complex to the east. Purpose: This digital map database, compiled from previously published and unpublished data and new mapping by the authors, represents the general distribution of surficial deposits and rock units in Point Reyes and surrounding areas. Together with the accompanying text file (pr-geo.txt or pr-geo.ps), it provides current information on the stratigraphy and structural geology of the area covered. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1997 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -123.03 East_Bounding_Coordinate: -122.63 North_Bounding_Coordinate: 38.25 South_Bounding_Coordinate: 37.88 Access_Constraints: none Use_Constraints: none Keywords: Theme: Theme_Keyword_Thesaurus: Alexandria Digital Library Feature Type Thesaurus Theme_Keyword: fault zones Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: geology Theme_Keyword: geologic maps Theme_Keyword: bedrock geologic units Theme_Keyword: surficial geologic units Theme_Keyword: geologic structure Theme_Keyword: geospatial datasets Theme: Theme_Keyword_Thesaurus: National Geologic Map Database Catalog themes, augmented Theme_Keyword: 3400 - Graphical Theme_Keyword: 3100 - Vector Theme_Keyword: 3420 - PostScript Theme_Keyword: 3110 - ESRI Theme_Keyword: 3112 - export Theme_Keyword: 1100 - Geology Theme_Keyword: 1101 - General Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Categories Theme_Keyword: geoscientificInformation Place: Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4 Place_Keyword: f06041 = Marin Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Brabb, Earl E Contact_Organization: USGS-GEO-WRG-NGM Contact_Address: Address_Type: mailing and physical address Address: Mail Stop 975, USGS 345 Middlefield Road City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: US Contact_Voice_Telephone: 650-329-5140 Contact_Electronic_Mail_Address: ebrabb@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/1997/of97-456/pr-map.pdf Browse_Graphic_File_Description: PDF representation of the geologic map sheet (6.4MB) Browse_Graphic_File_Type: PDF Data_Set_Credit: We are grateful to Don Lewis, former chief geologist of Chevron, for the release of well data and to Robert Fleisher also of Chevron for providing microfossil slides of Chevron Oil Company wells. We also are indebted to Kris McDougall for identifying and interpreting microfossils, to Martin Link for measuring and interpreting the sedimentology of the Kehoe Beach section, and to the late Clyde Wahrhaftig for enthusiastically supporting this work and for collaborating with us on two field trips in 1990 and 1991 to the Points Reyes area. LeeRoy Brock, former Chief Park Ranger of Point Reyes National Seashore, greatly facilitated our field work in 1978 and 1979. Carolyn Randolph, Heather Schoonover, and Carl Wentworth developed this digital version of the geologic map, and Carolyn Randolph prepared the booklet announcing the release of this database in Open Files. Partial funding was provided to Clark by USGS NEHRP award number 1434-HQ-96-GR-02741. Native_Data_Set_Environment: ARC/INFO version 7.0.3 Data_Quality_Information: Logical_Consistency_Report: his digital map database, compiled from previously published and unpublished data and new mapping by the authors, represents the general distribution of surficial deposits and rock units in Point Reyes and surrounding areas. The scale of the source maps limits the spatial resolution (scale) of the database to 1:48,000 or smaller. Completeness_Report: Complete map of surficial deposits Lineage: Process_Step: Process_Description: The geologic map information was digitized from stable originals of the geologic maps at 1:48,000 scale. A pencil on mylar overlay of the author manuscript were scanned using a Altek monochrome scanner with a resolution of 800 dots per inch. The scanned images were vectorized and transformed from scanner coordinates to projection coordinates with digital tics placed by hand at quadrangle corners. The scanned lines were edited interactively by hand using ALACARTE, color boundaries were tagged as appropriate, and scanning artifacts visible at 1:48,000 were removed. Base map layers were prepared from scale-stable printing negatives of the U.S. Geological Survey Point Reyes National Seashore and Vicinity, California 1:48,000 topographic map, which has an 80-foot contour interval and the U.S. Geological Survey Napa, California 1:100,000 drainage map. Scanned and vectorized images were transformed from scanner coordinates to projection coordinates with digital tics placed by hand at map corners. The images were then trimmed interactively by hand using ALACARTE to conform to the area of the geologic coverages. Process_Date: 1991-1997 Process_Step: Process_Description: Creation of original metadata record Process_Date: 20000803 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jennifer Lenz Contact_Organization: US Geological Survey Contact_Address: Address_Type: mailing Address: 12201 Surise Valley Drive, Mail Stop 918 City: Reston State_or_Province: VA Postal_Code: 20192 Country: USA Contact_Voice_Telephone: 703-648-6974 Contact_Facsimile_Telephone: 703-648-6560 Contact_Electronic_Mail_Address: pschweitzer@usgs.gov Source_Information: Source_Citation: Citation_Information: Originator: Galloway, A.J. Publication_Date: 1977 Title: Geology of the Point Reyes Peninsul, Marin County, California Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: California Division of Mines and Geology Bulletin Issue_Identification: Bulletin 202 Source_Scale_Denominator: 48000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1977 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Galloway (1977) Source_Contribution: The most comprehensive publication on the geology of the Point Reyes Peninsula is by Galloway (1977), who summarized the previous geologic work. Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: entity point SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: complete chain SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains 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: 0.9996 Longitude_of_Central_Meridian: -123 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Planar_Distance_Units: meters Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: PR-ARROWS.AAT Entity_Type_Definition: Landslide arrows Entity_Type_Definition_Source: OFR-97-456 Attribute: Attribute_Label: LTYPE Attribute_Definition: Line type Attribute_Definition_Source: OFR-97-456 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: arrow, certain Enumerated_Domain_Value_Definition: Landslide arrow Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, certain Enumerated_Domain_Value_Definition: Landslide contact Detailed_Description: Entity_Type: Entity_Type_Label: PR-GEOL.PAT Entity_Type_Definition: Geologic map units Entity_Type_Definition_Source: OFR-97-456 Attribute: Attribute_Label: PTYPE Attribute_Definition: Polygon type Attribute_Definition_Source: OFR-97-456 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qs Enumerated_Domain_Value_Definition: Beach sands (Holocene) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qd Enumerated_Domain_Value_Definition: Dune sands (Holocene) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qal Enumerated_Domain_Value_Definition: Alluvium (Holocene) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qls Enumerated_Domain_Value_Definition: Landslide deposits (Pleistocene and Holocene) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qod Enumerated_Domain_Value_Definition: Older dune sands (Pleistocene) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qt Enumerated_Domain_Value_Definition: Terrace deposits (Pleistocene) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qoc Enumerated_Domain_Value_Definition: Olema Creek Formation (Pleistocene) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qmi Enumerated_Domain_Value_Definition: Millerton Formation (Pleistocene) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: QTm Enumerated_Domain_Value_Definition: Merced Formation (upper Pliocene to Pleistocene) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Twg Enumerated_Domain_Value_Definition: Wilson Grove Formation (upper Miocene to lower Pliocene) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tp Enumerated_Domain_Value_Definition: Purisima Formation (upper Miocene to lower Pliocene) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tsc Enumerated_Domain_Value_Definition: Santa Cruz Mudstone (upper Miocene) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tsm Enumerated_Domain_Value_Definition: Santa Margarita Sandstone (upper Miocene) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tm Enumerated_Domain_Value_Definition: Monterey Formation (middle to upper Miocene) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tl Enumerated_Domain_Value_Definition: Laird Sandstone (middle Miocene) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tpr Enumerated_Domain_Value_Definition: Point Reyes Conglomerate of Galloway 1977 (lower Eocene) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Kg Enumerated_Domain_Value_Definition: Porphyritic granodiorite of Point Reyes (Upper Cretaceous) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Kgr Enumerated_Domain_Value_Definition: Granodiorite and granite of Inverness Ridge (Upper Cretaceous) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Kqd Enumerated_Domain_Value_Definition: Tonalite of Tomales Point (Upper Cretaceous) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: KJf Enumerated_Domain_Value_Definition: Franciscan complex (Jurassic and Cretaceous) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: m Enumerated_Domain_Value_Definition: metamorphic rocks Detailed_Description: Entity_Type: Entity_Type_Label: PR-GEOL.AAT Entity_Type_Definition: Linear features on geologic map Entity_Type_Definition_Source: OFR-97-456 Attribute: Attribute_Label: LTYPE Attribute_Definition: Line type Attribute_Definition_Source: OFR-97-456 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, certain Enumerated_Domain_Value_Definition: Observed contact Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, concealed Enumerated_Domain_Value_Definition: Concealed geologic contact whose position is inferred Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, approx. located Enumerated_Domain_Value_Definition: Geologic contact whose position is not precisely known Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, inferred Enumerated_Domain_Value_Definition: Geologic contact whose position is inferred Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fault, certain Enumerated_Domain_Value_Definition: Observed fault Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fault, concealed Enumerated_Domain_Value_Definition: Concealed fault whose position is inferred Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fault, approx. located Enumerated_Domain_Value_Definition: Fault whose position is not precisely known Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fault, inferred Enumerated_Domain_Value_Definition: Fault whose position is inferred Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: water boundary Enumerated_Domain_Value_Definition: Boundary of a body of water Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: map boundary Enumerated_Domain_Value_Definition: Boundary of mapped area Detailed_Description: Entity_Type: Entity_Type_Label: PR-GEOL.PAT Entity_Type_Definition: Geologic map units at specific locations (same attributes as polygon coverage PR-GEOL.PAT) Entity_Type_Definition_Source: OFR-97-456 Detailed_Description: Entity_Type: Entity_Type_Label: PR-OIL.PAT Entity_Type_Definition: Oil well locations Entity_Type_Definition_Source: OFR-97-456 Attribute: Attribute_Label: PTTYPE Attribute_Definition: Point type Attribute_Definition_Source: OFR-97-456 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: oilwell Enumerated_Domain_Value_Definition: location of oilwell Detailed_Description: Entity_Type: Entity_Type_Label: PR-OUTLN.AAT Entity_Type_Definition: Outline of mapped area Entity_Type_Definition_Source: OFR-97-456 Attribute: Attribute_Label: LTYPE Attribute_Definition: Line type Attribute_Definition_Source: OFR-97-456 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: map boundary, Enumerated_Domain_Value_Definition: Boundary of mapped area Detailed_Description: Entity_Type: Entity_Type_Label: PR-STRC.AAT Entity_Type_Definition: Fold axes Entity_Type_Definition_Source: OFR-97-456 Attribute: Attribute_Label: LTYPE Attribute_Definition: Line type Attribute_Definition_Source: OFR-97-456 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: f.a., anticline, approx. located Enumerated_Domain_Value_Definition: Anticlinal fold axis whose position is not precisely known Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: f.a., anticline, concealed Enumerated_Domain_Value_Definition: Concealed anticlinal fold axis whose position is inferred Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: f.a., syncline, approx. located Enumerated_Domain_Value_Definition: Synclinal fold axis whose position is not precisely known Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: f.a., syncline, concealed Enumerated_Domain_Value_Definition: Concealed synclinal fold axis whose position is inferred Detailed_Description: Entity_Type: Entity_Type_Label: PR-STRC.PAT Entity_Type_Definition: Bedding orientation Entity_Type_Definition_Source: OFR-97-456 Attribute: Attribute_Label: PTTYPE Attribute_Definition: Point type Attribute_Definition_Source: OFR-97-456 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: bedding Enumerated_Domain_Value_Definition: bedding orientation Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: flat bedding Enumerated_Domain_Value_Definition: Orientation of bedding that is basically horizontal Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: horz bedding Enumerated_Domain_Value_Definition: Horizontal bedding orientation Attribute: Attribute_Label: DIP Attribute_Definition: Dip of bedding Attribute_Definition_Source: OFR-97-456 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 75 Attribute_Units_of_Measure: degrees Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: STRIKE Attribute_Definition: Strike of bedding Attribute_Definition_Source: OFR-97-456 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 359 Attribute_Units_of_Measure: degrees Attribute_Measurement_Resolution: 1 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS Information Services Contact_Address: Address_Type: mailing Address: Box 25286, Denver Federal Center City: Denver State_or_Province: Colorado Postal_Code: 80255-0046 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Facsimile_Telephone: 1-303-202-4695 Contact_Electronic_Mail_Address: infoservices@usgs.gov Resource_Description: US Geological Survey Open-File Report 97-456 Distribution_Liability: This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. This database, identified as "Geology of Point Reyes National Seashore and Vicinity, California: A digital 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. Standard_Order_Process: Non-digital_Form: Map can be downloaded as a 7 megabyte PostScript file from http://pubs.usgs.gov/of/1997/of97-456/pr-map.tar.gz Map can also be downloaded as a 6.4 megabyte PDF file from http://pubs.usgs.gov/of/1997/of97-456/pr-map.pdf Fees: none Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE Format_Version_Number: 7.x Format_Information_Content: >ARC/INFO export files Description of coverage > >pr-geol.e00 Depositional contacts, faults, and unit labels >pr-strc.e00 Fold axes, strike and dip information >pr-arrows.e00 Landslide arrows >pr-oil.e00 Oil well locations >pr-topo.e00 Topographic contours base map >pr-drain.e00 Drainage base map >pr-outln.e00 Outline of map boundary File_Decompression_Technique: gzip and tar Transfer_Size: 15 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/1997/of97-456/pr-data.tar.gz Fees: none Metadata_Reference_Information: Metadata_Date: 20160205 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Peter N Schweitzer Contact_Organization: USGS Midwest Area Contact_Position: Collection manager, USGS Geoscience Data Clearinghouse, http://geo-nsdi.er.usgs.gov/ Contact_Address: Address_Type: mailing address Address: Mail Stop 954 12201 Sunrise Valley Dr City: Reston State_or_Province: VA Postal_Code: 20192-0002 Country: USA Contact_Voice_Telephone: 703-648-6533 Contact_Facsimile_Telephone: 703-648-6252 Contact_Electronic_Mail_Address: pschweitzer@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998