Metadata: Identification_Information: Citation: Citation_Information: Originator: Shellenbaum, D.P. Originator: Gregersen, L.J. Originator: Delaney, P.R. Publication_Date: 2010 Title: Top Mesozoic unconformity depth map of the Cook Inlet Basin, Alaska Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Report of Investigations Issue_Identification: RI 2010-2 Publication_Information: Publication_Place: Fairbanks, Alaska Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:500,000 Online_Linkage: http://dx.doi.org/10.14509/21961 Description: Abstract: Alaska Division of Oil and Gas personnel collected and interpreted various data sources related to the interpretation of the Base Tertiary unconformity surface in the Cook Inlet Basin, Alaska.Data sources included public literature, public well data information (from the AOGCC-Alaska Oil and Gas Conservation Commission), a palynology database (Greater Cook Inlet Stratigraphic Palynology Control Database and Stud,Zippi, P.A., 2006) and over 2000 miles of 2D marine seismic data (CI-88 and CI-89 licensed from, and complements of, CGGVeritas.) Interpreted formation tops of the Base Tertiary unconformity are tabulated on the map. Purpose: The purpose of the map is to provide an interpretation of the Cook Inlet basin Base Tertiary depth structure to the public. While most oil and gas exploration companies active in the Cook Inlet Basin have proprietary databases of seismic and well data with which they have created proprietary depth surface maps, a detailed map incorporating a significant amount of seismic data has not been available in the public domain, and to new companies who may be interested in exploring in the basin.This map incorporates seismic data over most of the marine portion overlying the basin.Additionally, this map will be used in a subsequent map of the Mesozoic subcrop surfaces, where Cretaceous and Jurassic subcrops will be displayed on the Base Tertiary depth surface. Supplemental_Information: This dataset includes three shapefiles and an CSV spreadsheet.The files are organized into four entities as described in this metadata file under the "Entity_and_Attribute_Information" section. The files are as follows: >control-points Well locations and interpreted depth to top Mesozoic unconformity in oil and gas wells. This table is provided as Table 1 on the printed map and in the csv file "control-points.csv" >contours Lines of equal elevation (shapefile) >faults Polyline representing the location of a displacement of rocks along a planar surface (shapefile) >folds Polyline indicating the location of an anticlinal or synclinal fold axis (shapefile) Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2010 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -155.00 East_Bounding_Coordinate: -149.00 North_Bounding_Coordinate: 62.00 South_Bounding_Coordinate: 59.00 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Theme_Keyword: Structure Map Theme_Keyword: Depth Interpretation Theme_Keyword: Basins Theme_Keyword: Subsurface Theme_Keyword: Structure Place: Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Place_Keyword: Cook Inlet Place_Keyword: Cook Inlet Basin Place_Keyword: Kenai Quadrangle Place_Keyword: Seldovia Quadrangle Place_Keyword: Tyonek Quadrangle Temporal: Temporal_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Temporal_Keyword: Mesozoic Access_Constraints: This report, map, and/or dataset are available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below). Use_Constraints: Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. User specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Contours outside of the CI88 and CI89 two-dimensional seismic coverage are dashed to indicate uncertainty. Contours outside seismic coverage with little well control have even higher uncertainties, and are designated with question marks.The absolute depth error at any given point on the map is difficult to quantify and results from uncertainties in a) the depth pick in wells, b) interpolation between and extrapolation away from wells, c) time picks on seismic, d)variations in the seismic velocity field, and e) gridding, contouring, and smoothing artifacts, particularly in areas of sparse seismic and well control. There is also a certain amount of spatial uncertainty regarding the intersection of the top Mesozoic unconformity horizon with the Bruin Bay and Castle Mountain - Lake Clark fault systems that bound the basin to the west. The fault traces (Magoon and others, 1976) indicate surface expression, whereas the Base Tertiary surface lies at varying depths. The unconformity depth surface has been contoured as if the faults are single vertical entities, but the reality is certain to be more structurally complex.The magnitude of this spatial uncertainty depends on the dips and complexity of the faults as well as the depth of the Base Tertiary surface.The deeper the surface and the shallower the actual fault dips, the larger the potential error. This report has received two technical reviews by scientists familiar with the subject matter as well as technical editing. Logical_Consistency_Report: The digitized lines representing faults, folds, and contours in this dataset were checked visually for duplication using ESRI ArcMap software. Completeness_Report: The map was constructed primarily from marine seismic reflection data and oil and gas wells that penetrated the top Mesozoic unconformity.Where the well control is too dense to differentiate at the 1:500,000 scale, an inset map is provided. Previous mapping and well penetrations were used to interpret the top Mesozoic unconformity depth surface where seismic was not available.The data set displays contours as well as fault and fold traces.This dataset does not include locations of oil and gas wells or seismic lines used to interpret the top Mesozoic unconformity. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Horizontal positional accuracy of entities outside of the two-dimensional seismic coverage area and where there is little well control is difficult to quantify.Error at any given point results from uncertainties in a) the depth pick in wells, b) interpolation between and extrapolation away from wells, c) time picks on seismic, d)variations in the seismic velocity field, and e) gridding, contouring, and smoothing artifacts, particularly in areas of sparse seismic and well control. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The location accuracy of interpreted depths displayed by the depth contours and presented in the "contours file" is discussed in Horizontal Positional Accuracy Report. The depth to the top Mesozoic unconformity for each well is presented in table 1 (Depth to top Mesozoic unconformity in oil and gas wells) and was interpreted using borehole geophysical log character, lithologic logs, and palynology data. The accuracy of our interpreted depths varies according the quality and density of the available data. Additional detail regarding the accuracy of our interpretations at each specific hole is not available. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Zippi, P.A. Publication_Date: 2006 Title: Greater Cook Inlet stratigraphic palynology control database and study Geospatial_Data_Presentation_Form: database Other_Citation_Details: unpublished proprietary report, 187 p. Online_Linkage: www.biostratigraphy.com Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2006 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Zippi, 2006 Source_Contribution: stratigraphic palynology control Source_Information: Source_Citation: Citation_Information: Originator: Alaska Oil & Gas Conservation Commission (AOGCC) Publication_Date: 2010 Title: Annual Report and public well databases Geospatial_Data_Presentation_Form: database Series_Information: Series_Name: Annual Report and public well databases Issue_Identification: 2010 Online_Linkage: http://doa.alaska.gov/ogc Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2010 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: AOGCC, 2010 Source_Contribution: well data Source_Information: Source_Citation: Citation_Information: Originator: Alaska Division of Oil & Gas Publication_Date: 2010 Title: Alaska Oil and Gas Report 2009 Geospatial_Data_Presentation_Form: document Publication_Information: Publication_Place: Anchorage, Alaska Publisher: Alaska Division of Oil & Gas Online_Linkage: http://www.dog.dnr.state.ak.us/oil/products/publications/publications.htm Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2010 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: AKDOG, 2010 Source_Contribution: structure contour data Source_Information: Source_Citation: Citation_Information: Originator: Canadian Stratigraphic Services Lithologic Logs Publication_Date: 2010 Title: USA Well Log Index Geospatial_Data_Presentation_Form: spreadsheet Other_Citation_Details: choose "log index" for details Online_Linkage: www.canstrat.com Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2010 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Canstrat, 2010 Source_Contribution: well logs Source_Information: Source_Citation: Citation_Information: Originator: Magoon, L.B Originator: Adkison, W.L Originator: Egbert, R.M. Publication_Date: 1976 Title: Map showing geology, wildcat wells, Tertiary plant-fossil localities, K-Ar age dates and petroleum operations, Cook Inletarea, Alaska Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Miscellaneous Investigation Map Issue_Identification: I-1019 Other_Citation_Details: 3 sheets, scale 1:250,000 Source_Scale_Denominator: 250000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1976 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Magoon and others, 1976 Source_Contribution: geology Source_Information: Source_Citation: Citation_Information: Originator: Wilson, F.H. Originator: Hults, C.P. Originator: Schmoll, H.R. Originator: Haeussler, P.J. Originator: Schmidt, J.M. Originator: Yahle, L.A. Originator: Labay, K.A. Publication_Date: 2009 Title: Preliminary Geologic Map of the Cook Inlet Region, Alaska Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Open File Report Issue_Identification: OF 2009-1108 Other_Citation_Details: 2 sheets, scale 1:250,000 Source_Scale_Denominator: 250000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2009 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Wilson and others, 2009 Source_Contribution: geologic map Source_Information: Source_Citation: Citation_Information: Originator: CGGVeritas, 2010 Publication_Date: 2010 Title: CGGVeritas CI88 and CI89 marine 2D seismic speculative data Geospatial_Data_Presentation_Form: document Other_Citation_Details: website under Products & Services / Data Library for details Online_Linkage: www.cggveritas.com Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2010 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: CGGVeritas, 2010 Source_Contribution: seismic data Source_Information: Source_Citation: Citation_Information: Originator: DNR Staff Publication_Date: Unpublished material Title: State of Alaska, Department of Natural Resources, Alaska Statewide Core GIS database Geospatial_Data_Presentation_Form: vector digital data Type_of_Source_Media: digital file Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2010 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: DNR, 2010 Source_Contribution: base map Process_Step: Process_Description: Well Interpretation - Public well logs were obtained from the Alaska Oil and Gas Conservation Commission (AOGCC). The depth to the top Mesozoic unconformity was interpreted using borehole geophysical log character, lithologic logs, and palynology data (Zippi, 2006). Where available, sonic and density logs were edited and combined to create synthetic seismograms used in calibrating to the seismic data. Source_Used_Citation_Abbreviation: AOGCC, 2010 Source_Used_Citation_Abbreviation: Zippi, 2006 Process_Date: 2010 Process_Step: Process_Description: Seismic Interpretation - The seismic dataset used for interpretation consists of proprietary, speculative two-dimensional marine data (CI88 and CI89 prefix lines, owned and marketed by CGGVeritas and used by the Alaska Department of Natural Resources with permission from CGGVeritas). To tie the seismic data to the well data, calibrations were attempted for all synthetic seismograms of wells on or near seismic lines. Well ties to seismic were analyzed both visually and statistically. Two wells yielded synthetic seismogram to seismic ties of good quality to the top Mesozoic unconformity. Additional synthetic seismograms were useful in predicting the seismic character of the West Foreland Formation. Check shot velocity surveys were publicly available from two wells, OCS 0243 (Falcon) #1 and OCS 0086 (Guppy) #1. Depth-variant velocities were calculated from the synthetic seismogram ties and from the measured check shots to generate a depth and spatially variant velocity field. The following data and observations were integrated to generate the top Mesozoic unconformity seismic interpretation: 1) Time-to-depth relationships based on synthetic seismograms and checkshot velocity surveys 2) Top Mesozoic unconformity well picks displayed in time 3) Top West Foreland Formation seismic interpretation. This prominent seismic horizon is a short distance above, and generally conformable with, the top Mesozoic unconformity. Synthetic seismograms at this horizon generally showed a significant decrease in acoustic impedance, which should translate to a consistent strong reflector on the seismic.Interpretation of this horizon helped guide the underlying top Mesozoic unconformity pick. 4) The top Mesozoic is sometimes an angular unconformity, and seismic reflectors below it can have steeper dips, and be truncated by the unconformity surface. Source_Used_Citation_Abbreviation: CGGVeritas, 2010 Process_Date: 2010 Process_Step: Process_Description: Seismic time-to-depth conversion - Two-way time seismic picks on the top Mesozoic unconformity were gridded to form a surface.Time values were extracted at well penetrations by piercing the time surface with the well paths. The top Mesozoic unconformity depths at the well penetrations were divided by one-way time values to create ‘pseudo-velocities’, or average velocities from the horizon to the surface. An implicit assumption in this depth conversion methodology is that the structural dip varies smoothly between control points. However, wells are mostly drilled on major structural highs in Cook Inlet, resulting in additional velocity control points being needed in areas of inadequate sampling, predominantly in the deeper parts of the basin. The additional control point values were estimated from cross plots of time versus pseudo-velocity, extrapolating an interpreted time-velocity slope to the deeper times observed on the seismic. The velocities from well penetrations and added control were then gridded to form a horizon velocity surface, which was multiplied with the seismic one-way time surface to create a depth surface. The depth surface contours were hand edited to remove computer-generated artifacts, which were especially apparent on the edges of seismic control and near faults and other areas of strong structural variability. Process_Date: 2010 Process_Step: Process_Description: Interpretation Outside Seismic Control - The following data were used to interpret the top Mesozoic unconformity depth surface where seismic was not available: 1) Well penetrations 2) Bounding faults and fold axes 3) Contacts between Mesozoic and Tertiary geologic units from surface geologic mapping 4) Structural contour maps from AOGCC annual reports. Source_Used_Citation_Abbreviation: Magoon and others, 1976 Source_Used_Citation_Abbreviation: Wilson and others, 2009 Process_Date: 2010 Process_Step: Process_Description: Digital Cartography - Contours, fold axes, and faults were initially constructed using GeoGraphix software.Due to software issues, the data was not exported directly from GeoGraphix in shapefile format.Rather, the data was saved as a .pdf document and sent to Design Presentation Associates for georeferencing and vectorization of all line work.The line work was then checked for positional accuracy and completeness and was attributed in ESRI ArcGIS.All final annotation, editing, and layout was done in CorelDraw. Process_Date: 2010 Process_Step: Process_Description: Base layer was extracted from State of Alaska, Department of Natural Resources, Alaska Statewide Core GIS database. Source_Used_Citation_Abbreviation: DNR, 2010 Process_Date: 2010 Spatial_Data_Organization_Information: Indirect_Spatial_Reference: Well locations were extracted from the Alaska Oil and Gas Conservation Commission (AOGCC) online catalog, accessed in 2010. Each well is indexed in the AOGCC catalog by well name and and API number. Well locations are displayed in the printed map and well names and API numbers are provided in table 1. Direct_Spatial_Reference_Method: Vector Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 5 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -153.000000 Latitude_of_Projection_Origin: 0 False_Easting: 500000.000000 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000001 Ordinate_Resolution: 0.000001 Planar_Distance_Units: meters Planar_Coordinate_Layer_Name: contours Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 5 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -153.000000 Latitude_of_Projection_Origin: 0 False_Easting: 500000.000000 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000001 Ordinate_Resolution: 0.000001 Planar_Distance_Units: meters Planar_Coordinate_Layer_Name: faults Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 5 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -153.000000 Latitude_of_Projection_Origin: 0 False_Easting: 500000.000000 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000001 Ordinate_Resolution: 0.000001 Planar_Distance_Units: meters Planar_Coordinate_Layer_Name: folds Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.25722210088 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: contours Entity_Type_Label: contours.shp Entity_Type_Definition: Lines of equal elevation Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: Elevation Attribute_Definition: vertical depth in feet Attribute_Definition_Source: Alaska Division of Oil & Gas Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: -25000 Attribute_Units_of_Measure: feet Attribute: Attribute_Label: contour_type Attribute_Definition: differentiates contours as index or intermediate and the associated level of certainty for the purpose of symbolizing Attribute_Definition_Source: Alaska Division of Oil & Gas Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: int_dash Enumerated_Domain_Value_Definition: intermediate_dashed; refers to approximately located intermediate contour Enumerated_Domain_Value_Definition_Source: Alaska Division of Oil & Gas Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: int Enumerated_Domain_Value_Definition: intermediate contour Enumerated_Domain_Value_Definition_Source: Alaska Division of Oil & Gas Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: index_dash Enumerated_Domain_Value_Definition: approximately located index contour Enumerated_Domain_Value_Definition_Source: Alaska Division of Oil & Gas Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: index Enumerated_Domain_Value_Definition: index contour Enumerated_Domain_Value_Definition_Source: Alaska Division of Oil & Gas Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: faults Entity_Type_Label: faults.shp Entity_Type_Definition: Polyline representing the location of a displacement of rocks along a planar surface. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: Fault_ID Attribute_Definition: defines the type of fault Attribute_Definition_Source: Alaska Division of Oil & Gas Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: normal_seis Enumerated_Domain_Value_Definition: normal fault derived from seismic interpretation Enumerated_Domain_Value_Definition_Source: Alaska Division of Oil & Gas Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: strike_slip Enumerated_Domain_Value_Definition: strike-slip fault Enumerated_Domain_Value_Definition_Source: Alaska Division of Oil & Gas Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: strike_slip_dash Enumerated_Domain_Value_Definition: approximately located strike-slip fault Enumerated_Domain_Value_Definition_Source: Alaska Division of Oil & Gas Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: thrust Enumerated_Domain_Value_Definition: thrust fault Enumerated_Domain_Value_Definition_Source: Alaska Division of Oil & Gas Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: thrust_dash Enumerated_Domain_Value_Definition: approximately located thrust fault Enumerated_Domain_Value_Definition_Source: Alaska Division of Oil & Gas Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: thrust_seis Enumerated_Domain_Value_Definition: thrust fault derived from seismic interpretation Enumerated_Domain_Value_Definition_Source: Alaska Division of Oil & Gas Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: folds Entity_Type_Label: folds.shp Entity_Type_Definition: Polyline indicating the location of an anticlinal or synclinal fold axis. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: Fold_ID Attribute_Definition: refers to the type of fold Attribute_Definition_Source: Alaska Division of Oil & Gas Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: acl Enumerated_Domain_Value_Definition: anticline Enumerated_Domain_Value_Definition_Source: Alaska Division of Oil & Gas Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: acl_dash Enumerated_Domain_Value_Definition: approximately located anticline Enumerated_Domain_Value_Definition_Source: Alaska Division of Oil & Gas Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: scl Enumerated_Domain_Value_Definition: syncline Enumerated_Domain_Value_Definition_Source: Alaska Division of Oil & Gas Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: scl_dash Enumerated_Domain_Value_Definition: approximately located syncline Enumerated_Domain_Value_Definition_Source: Alaska Division of Oil & Gas Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: control-points Entity_Type_Label: control-points.csv Entity_Type_Definition: Depth to top Mesozoic unconformity in oil and gas wells Entity_Type_Definition_Source: this report Attribute: Attribute_Label: Well Number Attribute_Definition: provides a cross reference between the well location displayed on the printed map and the interpreted depth values provided in table 1. Attribute_Definition_Source: this report Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 101 Attribute: Attribute_Label: API No. Attribute_Definition: API number - AOGCC catalog index number for each well Attribute_Definition_Source: Alaska Oil and Gas Conservation Commission (AOGCC) Attribute_Domain_Values: Unrepresentable_Domain: Alaska Oil and Gas Conservation Commission (AOGCC) catalog index number Attribute: Attribute_Label: Measured Depth (ft) Attribute_Definition: measured distance along the path of a wellbore from the kelly bushing to the interpreted top Mesozoic unconformity. Attribute_Definition_Source: this report Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 670 Range_Domain_Maximum: 16650 Attribute_Units_of_Measure: feet Attribute: Attribute_Label: True Vertical Depth, Subsea (ft) Attribute_Definition: vertical distance from sea level to the interpreted top Mesozoic unconformity Attribute_Definition_Source: this report Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -591 Range_Domain_Maximum: -16221 Attribute_Units_of_Measure: feet Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: 907-451-5020 Contact_Facsimile_Telephone: 907-451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Contact_Instructions: Please view our web site (http://www.dggs.alaska.gov) for the latest information on available data. 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