Identification_Information: Citation: Citation_Information: Originator: Rowland W. Tabor Originator: Derek B. Booth Originator: Kathy G. Troost Publication_Date: 2014 Title: Lidar-Revised Geologic Map of the Poverty Bay 7.5' Quadrangle, King, and Pierce Counties, Washington Geospatial_Data_Presentation_Form: vector digital data Other_Citation_Details: Digital database and cartography by Rowland W. Tabor Online_Linkage: http://dx.doi.org/10.3133/sim3317 Description: Abstract:The geology of the Poverty Bay 7.5' quadrangle expresses much of the broad range of Quaternary environments and deposits found throughout the central Puget Lowland. The topography is dominated by an extensive upland plain, mantled by a thin layer of glacial till deposited about 17,000 (14,000 radiocarbon) years ago during the last occupation of the Puget Lowland by a great continental ice sheet. Scattered across this upland surface are the terrace and channel deposits of rivers that issued from the snout of the retreating ice sheet as it withdrew to the north. Beneath these ice-sheet deposits is a complex sequence of older unconsolidated sediments that extends far below sea level across most of the quadrangle. These older sediments are exposed primarily where modern erosion has sliced through the younger glacial deposits—notably by the Green River, lying a few kilometers east of the east map boundary, and by wave erosion along Puget Sound to the west and southwest. In these areas, the sequences of exposed deposits display both similarities and differences. The older sediments are very compact, having been weighted down by one or more glacial advances subsequent to their deposition. Many are also cemented by iron oxides and hydroxides, a consequence of the many tens or hundreds of thousands of years of weathering that they have experienced. Excellent but widely scattered exposures of this older Pleistocene sequence are displayed in the coastal bluffs of the quadrangle and in active and recently abandoned quarries. The quadrangle also is located at the center of the intensively developing urban core of the Puget Lowland region. It includes the northeastern part of the city of Tacoma, the third largest municipality in Washington State, and all or part of the cities of Federal Way, Auburn, Kent, Pacific, Algona, Milton, and Fife. Interstate 5, the main north-south highway through the Pacific Northwest, traverses the length of the quadrangle. Increasing population and a strong transportation network have fostered urban and suburban development in almost every part of the quadrangle. This development, in turn, is causing some of the most rapid geomorphic changes to occur since the wastage of the ice sheet. Purpose: This database and accompanying plot files depict the distribution of geologic materials and structures at 1:24,000 scale. The report is intended to provide geologic information for the study of materials properties, earthquake shaking, landslide potential, mineral hazards, seismic velocity, and earthquake faults. In addition, the report contains new information and interpretations about the regional geologic history and framework. However, the scale of this report does not provide sufficient detail for site development purposes. Supplemental_Information: DIGITAL COMPILATION: Interpretation of the lidar DEM began with a geomorphic interpretation following the protocol outlined by Haugerud (2009). We did no additional field work to make this map. Contacts of post-glacial deposits and most glacial deposits are interpreted from the lidar DEM. The digital compilation was done in version 9.3 of ARC/INFO. BASE MAP: In 2000 and 2001, the Puget Sound Lidar Consortium obtained 1 pulse/m2 lidar data for the area which underlies the 6-ft (2 meter) lidar-derived digital elevation model (DEM) serving as a base for this map. Tabor digitized the drainage net from the lidar DEM SPATIAL RESOLUTION- Uses of this digital geologic map should not violate the spatial resolution of the data. Although the digital form of the data removes the constraint imposed by the scale of a paper map, the detail and accuracy inherent in map scale are also present in the digital data. The fact that this database was edited for a scale of 1:24,000 means that higher resolution information is not present in the dataset. Plotting at scales larger than 1:24,000 will not yield greater real detail, although it may reveal fine- scale irregularities below the intended resolution of the database. Similarly, where this database is used in combination with other data of higher resolution, the resolution of the combined output will be limited by the lower resolution of these data. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2013 Currentness_Reference: 2013 Status: Progress: Complete Maintenance_and_Update_Frequency: As needed. Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -122.379918 East_Bounding_Coordinate: -122.247848 North_Bounding_Coordinate: 47.376456 South_Bounding_Coordinate: 47.248189 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: alluvium Theme_Keyword: Buenna slide Theme_Keyword: colluvium Theme_Keyword: Cordilleran ice sheet Theme_Keyword: Double Bluff drift Theme_Keyword: esker Theme_Keyword: Fraser glaciation Theme_Keyword: geology Theme_Keyword: glacial lakes Theme_Keyword: glacial rebound Theme_Keyword: glacial stratigraphy Theme_Keyword: glacial terraces Theme_Keyword: glaciation Theme_Keyword: infrared-stimulated luminescent ages Theme_Keyword: Lake Bretz Theme_Keyword: Lake Russell Theme_Keyword: Lake Tapps tephra Theme_Keyword: Landslide Theme_Keyword: Lawton Clay Theme_Keyword: lidar Theme_Keyword: lucustrine deposits Theme_Keyword: Olympia beds Theme_Keyword: Olympia nonglacial interval Theme_Keyword: Osceola mudflow Theme_Keyword: outwash deposits Theme_Keyword: paleomagnetic Theme_Keyword: Pleistocene Theme_Keyword: Puget lobe Theme_Keyword: Quaternary Theme_Keyword: radiocarbon dates Theme_Keyword: recessional deposits Theme_Keyword: Salmon Springs Drift Theme_Keyword: till Theme_Keyword: Vashon stade Theme_Keyword: Woodmont slide Place Place_Keyword_Thesaurus: None Place_Keyword: Adelaide Place_Keyword: Cascade Range Place_Keyword: Federal Way Place_Keyword: Green River Place_Keyword: Hylebos Waterway Place_Keyword: King County Place_Keyword: Lake Fenwick Place_Keyword: Mill Creek Place_Keyword: Milton Place_Keyword: Mount Rainier Place_Keyword: North Cascade Range Place_Keyword: Peasley Canyon Place_Keyword: Pierce Count Place_Keyword: Poverty Bay Place_Keyword: Puget Lowland Place_Keyword: Puget Sound Place_Keyword: Redondo Place_Keyword: Woodman Beach Access_Constraints: None Use_Constraints: Use at your own risk Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.1850 Data_Quality_Information: Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Use of lidar source materials dictates that locational accuracy is no better than about +/-30 feet. See Haugerud (2009) for discussion of lidar positional accuracy. Because the lidar base does not match exactly the 1953 1:24,000-scale topographic map of the Poverty Bay Quadrangle, positional accuracy of contacts adapted directly from SIM 2854 is even less. Completeness_Report: Complete Lineage: Process_Step: Process_Description: Using hillshade models constructed from lidar imagery, and the general position of geologic contacts, structural data, and the original field notes, the Rowland Tabor and Derek Booth reconstructed the geologic map of the Poverty Bay Quadrangle. Process_Date: 2008-2013 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: The digital database package contains 9 vector datasets (ESRI ArcInfo coverages) presented in .e00-file format. Each coverage contains formal XML-format metadata with complete entity-and-attribute information, including extensive definitions of feature-attribute values. Also included are a brief readme file and a large (147.5 MB) image in TIFF format that combines geologic map-unit colors with a shaded-relief image of topography derived from LIDAR. Users of the database package may wish to download the pamphlet for the contained Description of Map Units. Entity_and_Attribute_Detail_Citation: none Detailed_Description: Entity_Type: Entity_Type_Label: pvbgeol.e00 Entity_Type_Definition: ArcInfo export file of network coverage of the geology of the Olalla Quadrangle, WA, at 1:24,000 scale. 2076 arcs, 654 polygons. Includes metadata for cover. Located in Geology directory. Entity_Type_Definition_Source: author Detailed_Description: Entity_Type: Entity_Type_Label: pvbstruct.e00 Entity_Type_Definition: ArcInfo export file of a point coverage of the stuctural data of the Poverty Bay Quadrangle, WA, at 1:24,000 scale, 6 points, and age sample locations, 8 points. Includes metadata for cover. Located in Geology directory. This data adapted from original map (SIM 2854; http://pubs.usgs.gov/sim/2004/2854/) Entity_Type_Definition_Source: author Detailed_Description: Entity_Type: Entity_Type_Label: pvbed_block.e00 Entity_Type_Definition: ArcInfo export file of arc coverage showing locations of 9 thin pre-Vashon till and volcanic ash beds and the trace of the Lake Fenwick block slide surface, 21 arcs, in the Poverty Bay Quadrangle, WA, at 1:24,000 scale. Includes metadata for cover. Located in Geology directory. This data adapted from original map (SIM 2854; http://pubs.usgs.gov/sim/2004/2854/). Entity_Type_Definition_Source: author Detailed_Description: Entity_Type: Entity_Type_Label: pvbdbstat.e00 Entity_Type_Definition: ArcInfo export file of field station locations. Includes metadata for cover. Located in Geology directory. Entity_Type_Definition_Source: author Detailed_Description: Entity_Type: Entity_Type_Label: pvbdrain.e00 Entity_Type_Definition: ArcInfo export file of drainage network, 121 arcs. Includes metadata for cover. Located in Base directory. Entity_Type_Definition_Source: author Detailed_Description: Entity_Type: Entity_Type_Label: pvbrds.e00 Entity_Type_Definition: ArcInfo export file of road network, 448 arcs. Includes metadata for cover. Located in Base directory. Entity_Type_Definition_Source: author Detailed_Description: Entity_Type: Entity_Type_Label: pvbhs.e00 Entity_Type_Definition: ArcInfo export file of hard surface areas, 40 polygons. Includes metadata for cover. Located in Base directory. Entity_Type_Definition_Source: author Detailed_Description: Entity_Type: Entity_Type_Label: pvbsect_cb.e00 Entity_Type_Definition: ArcInfo export file of section lines and county boundary, 177 arcs. Includes metadata for cover. Located in Base directory. Entity_Type_Definition_Source: author Detailed_Description: Entity_Type: Entity_Type_Label: pvb40con.e00 Entity_Type_Definition: ArcInfo export file of contours derived from lidar data, 685 arcs. Includes metadata for cover. Located in Base directory. Entity_Type_Definition_Source: author Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S Geological Survey, Information Services Contact_Voice_Telephone: (303) 202-4200 Resource_Description: Downloadable Data Distribution_Liability: None. Use these data at your own risk Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE Transfer_Size: 0.014 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://dx.doi.org/10.3133/sim3317 Fees: None Metadata_Reference_Information: Metadata_Date: 2014 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Rowland Tabor Contact_Address: Address_Type: mailing address Address: U.S. Geological Survey Address: 345 Middlefield Road Address: MS 973 City: Menlo Park State_or_Province: California Postal_Code: 94025 Country: USA Contact_Voice_Telephone: 650 329 4955 Contact_Electronic_Mail_Address: rtabor@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Profile_Name: ESRI Metadata Profile Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile