- Identification Information:
- Citation:
- Citation Information:
- Originator: Alberta Geological Survey
- Originator: Alberta Energy and Utilities Board
- Originator: Pawlowicz, J.G.
- Originator: Fenton, M.M.
- Publication Date: 200503
- Title: Bedrock Topography of Peerless Lake Area, Alberta (NTS 84B) (GIS data, line features)
- Geospatial Data Presentation Form: vector digital data
- Series Information:
- Series Name: Digital Data
- Issue Identification: DIG 2005-09
- Publication Information:
- Publication Place: Edmonton, Alberta, Canada
- Publisher: Alberta Geological Survey
- Description:
- Abstract:
- The bedrock topography map of the Peerless Lake area (NTS 84B) shows the elevation of the bedrock surface. In general, the topography of the land surface reflects the bedrock topography. Thus, bedrock highs underlie the Buffalo Head Hills Upland, Peerless Lake Upland and Utikuma Uplands. Major buried valleys lie within the Loon River Lowland in the west-central part and within the Wabasca Lowlands in the south and northeast parts of the map area. The elevation of the bedrock surface ranges from 780 metres above sea level (masl) in the Buffalo Head Hills to 300 masl in the Loon River Lowland. Segments of three major buried valleys are present: the Muskwa Valley in the south, the Red Earth Valley in the Loon River Lowland and Gods Valley in the northeast. The exact shape of these bedrock valleys and their relationships in the areas where they appear to merge is uncertain as a consequence of the scarcity of relevant drillholes. The Muskwa Valley trends westward towards Lubicon Lake and approximately corresponds with the southern part of the Misaw Channel of Ceroici and part of the L'Hirondelle Channel of Ceroici and Borneuf. The eastern extent of the Muskwa Valley also corresponds with a bedrock low in the northeast corner of the Lesser Slave Lake map area (NTS 83O). The Red Earth Valley partly corresponds to the northerly trending segment of the Misaw Channel of Ceroici, although in the northern part of Loon River Lowland the Red Earth Valley trends north-northeasterly. In the northern part of the Loon River Lowland, abrupt changes in the elevation of stratigraphic markers appear to define a northeasterly trending graben-like structure, which suggests the trend of the Red Earth Valley is partly controlled by bedrock structure. The lowest elevation along the Red Earth Valley is near the town of Red Earth Creek.
- Purpose: For depicting bedrock topography in the Peerless Lake area (NTS84B) in GIS format.
- Supplemental Information:
- Petrophysical logs were the primary source of information used for constructing the bedrock topography. A suite of the common well logs (gamma, resistivity, spontaneous potential, density, neutron, sonic and calliper) were useful in making the pick for the top of bedrock; however, the gamma and resistivity logs proved to be the most useful. The drift typically displays a lower gamma response and higher resistivity response than the underlying bedrock. Other sources of data were water well lithologs, mineral exploration drillholes and outcrop information.
- Time Period of Content:
- Time Period Information:
- Range of Dates/Times:
- Beginning Date: 2000
- Ending Date: 2002
- Currentness Reference: process date
- Status:
- Progress: Complete
- Maintenance and Update Frequency: None planned
- Spatial Domain:
- Bounding Coordinates:
- West Bounding Coordinate: -116.009583
- East Bounding Coordinate: -113.992966
- North Bounding Coordinate: 57.003426
- South Bounding Coordinate: 55.9944
- Keywords:
- Theme:
- Theme Keyword Thesaurus:
- Theme Keyword: bedrock topography
- Theme Keyword: drift thickness
- Theme Keyword: buried valley
- Theme Keyword: overburden
- Theme Keyword: glacial drift
- Theme Keyword: preglacial
- Place:
- Place Keyword Thesaurus:
- Place Keyword: alberta
- Place Keyword: buffalo head hills
- Place Keyword: canada
- Place Keyword: peerless lake
- Access Constraints: Public
- Use Constraints: Credit to originator/source required. Commercial reproduction not allowed.
- Point of Contact:
- Contact Information:
- Contact Organization Primary:
- Contact Organization: Alberta Geological Survey
- Contact Person: Information Specialist
- Contact Position: Information Specialist
- Contact Address:
- Address Type: mailing and physical
- Address: Alberta Energy and Utilities Board
- Address: 4th Floor, Twin Atria Building
- Address: 4999-98 Avenue
- City: Edmonton
- State or Province: Alberta
- Postal Code: T6B 2X3
- Country: Canada
- Contact Voice Telephone: (780) 422-3767
- Contact Facsimile Telephone: (780) 422-1918
- Contact Electronic Mail Address: eub.ags-infosales@gov.ab.ca
- Hours of Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.
- Data Set Credit: N.L. Clarke, E. J. Waters, M.C. Price
- Data Quality Information:
- Logical Consistency Report:
- The stratigraphic picks used to produce the bedrock surface and drift thickness contours were verified for each data point used. Contouring of the data was first done by a contouring program and then the contour lines were hand-edited on the computer to produce the final interpretation.
- Completeness Report:
- To generate the contour lines of the bedrock surface and drift thickness, data sources included oil and gas wells, water wells and mineral exploration drillholes. Data from 401 points were used. Of these data, 167 were oil and gas well geophysical logs with bedrock pick, 122 were oil and gas well geophysical logs with bedrock above top of well logs, 54 were water well lithologs with bedrock pick, 5 were water well lithologs with depth of bedrock lying below bottom of well, 44 were mineral drillhole lithologs with bedrock pick and 9 were mineral drillhole lithologs with depth of bedrock lying below bottom of the hole.
- Positional Accuracy:
- Horizontal Positional Accuracy:
- Horizontal Positional Accuracy Report:
- Bedrock contour and drift thickness lines were edited to reflect a valley incision geological model and to honour each data point.
- Lineage:
- Process Step:
- Process Description:
- The drift thickness and structure contour of the bedrock surface maps were determined from bedrock stratigraphic picks made from three main sources: oil and gas wells, water wells and mineral exploration drillholes. In oil and gas wells, the bedrock picks were made using geophysical logs. From water wells and mineral drillholes, lithologic decriptions were used to determine the depth to bedrock pick. Picks data were tabulated and imported into a contour-mapping software (MacCad v6.0) using a Macintosh desktop computer. The data were then gridded by triangulation using the Delaunay tuple method. The resultant grid was then contoured using the mapping software. The contour lines were then manually edited on the computer using the MacCad software. The final line interpretation was then gridded again using 400 x 400 grid matrix to produce infill colour rendition.
Final map preparation was as follows: the bedrock contour and gridded data were exported from MacCad in .dxf format and imported into ArcInfo v8.3. The attributes were deleted. The coverages were transformed from page units to real world coordinates (RMS error +/- 20 m) and projected to UTM12 NAD83. The contour lines were smoothed, tagged with the corresponding elevation values and exported to shapefiles. Map compilation was done using ArcGis v8.3.
- Process Date: 2004
- Spatial Data Organization Information:
- Direct Spatial Reference Method: Vector
- Point and Vector Object Information:
- SDTS Terms Description:
- SDTS Point and Vector Object Type: Complete chain
- Point and Vector Object Count: 65
- SDTS Terms Description:
- SDTS Point and Vector Object Type: Point
- Point and Vector Object Count: 4
- Spatial Reference Information:
- Horizontal Coordinate System Definition:
- Geographic:
- Geographic Coordinate Units: Decimal degrees
- Latitude Resolution: 0.000000
- Longitude Resolution: 0.000000
- Geodetic Model:
- Horizontal Datum Name: North American Datum of 1983
- Ellipsoid Name: Geodetic Reference System 80
- Semi-Major Axis: 6378137.000000
- Denominator of Flattening Ratio: 298.257222
- Entity and Attribute Information:
- Detailed Description:
- Entity Type:
- Entity Type Label: btopo_84b_ll.aat
- Entity Type Definition: Line features
- Entity Type Definition Source: Alberta Geological Survey
- Attribute:
- Attribute Label: ELEVATION
- Attribute Definition: Interpolated bedrock surface elevation in metres above sea level
- Attribute Definition Source: Alberta Geological Survey
- Distribution Information:
- Distributor:
- Contact Information:
- Contact Organization Primary:
- Contact Organization: Alberta Geological Survey
- Contact Person: Information Sales Coordinator
- Contact Position: Information Sales Coordinator
- Contact Address:
- Address Type: mailing and physical
- Address: Alberta Energy and Utilities Board
- Address: 4th Floor, Twin Atria Building
- Address: 4999-98 Avenue
- City: Edmonton
- State or Province: Alberta
- Postal Code: T6B 2X3
- Country: Canada
- Contact Voice Telephone: (780) 422-3767
- Contact Facsimile Telephone: (780) 422-1918
- Contact Electronic Mail Address: eub.ags-infosales@gov.ab.ca
- Hours of Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.
- Distribution Liability:
- The Alberta Energy and Utilities Board/Alberta Geological Survey (EUB/AGS) and its employees and contractors make no warranty, guarantee or representation, express or implied, or assume any legal liability regarding the correctness, accuracy, completeness or reliability of this publication. The data are supplied on the understanding that they are for the sole use of the user and will not be redistributed in any form, in whole or in part, to third parties. Any references to proprietary software in our documentation, and/or any use of proprietary data formats in our releases, do not constitute endorsement by the EUB/AGS of any manufacturer's product.
- Metadata Reference Information:
- Metadata Date: 20050301
- Metadata Contact:
- Contact Information:
- Contact Organization Primary:
- Contact Organization: Alberta Geological Survey
- Contact Person: Information Specialist
- Contact Position: Information Specialist
- Contact Address:
- Address Type: mailing and physical
- Address: Alberta Energy and Utilities Board
- Address: 4th Floor, Twin Atria Building
- Address: 4999-98 Avenue
- City: Edmonton
- State or Province: Alberta
- Postal Code: T6B 2X3
- Country: Canada
- Contact Voice Telephone: (780) 422-3767
- Contact Facsimile Telephone: (780) 422-1918
- Contact Electronic Mail Address: eub.ags-infosales@gov.ab.ca
- Hours of Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.
- Metadata Standard Name: FGDC Content Standard for Digital Geospatial Metadata
- Metadata Standard Version: FGDC-STD-001-1998
- Metadata Time Convention: local time
- Metadata Access Constraints: none
- Metadata Use Constraints: none