- 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 Thalwegs of Peerless Lake Area, Alberta (NTS 84B) (GIS data, thalweg line features)
- Geospatial Data Presentation Form: vector digital data
- Series Information:
- Series Name: Digital Data
- Issue Identification: DIG 2005-11
- Publication Information:
- Publication Place: Edmonton, Alberta, Canada
- Publisher: Alberta Geological Survey
- Description:
- Abstract:
- The data represent the locations of thalwegs (paleo-channels) incised in the bedrock surface. Segments of three major buried valleys are present: the Muskwa Valley, the Red Earth Valley and Gods Valley in the northeastern portion of the area.
- Purpose:
- For depicting the thalwegs of paleo-drainage systems 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 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 and mineral exploration drillholes.
Picking the bedrock surface was difficult in some areas where data were sparse. Many of the log traces were absent from the upper part of the hole because of surface casing. The depth of surface casing set in bedrock was used for an estimate of maximum drift thickness in places with few data. Conversely, some water wells and mineral drillholes did not penetrate deep enough to intersect the bedrock, so only a minimum drift thickness value could be used.
- 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: -115.992104
- East Bounding Coordinate: -114
- North Bounding Coordinate: 57.000683
- South Bounding Coordinate: 56.00547
- 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: 84b
- 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:
- Visual checks have been made of the data by the author and plotted versions of the data have been checked by a third party.
- Completeness Report: Thalweg data are shown only for the major buried valleys.
- Positional Accuracy:
- Horizontal Positional Accuracy:
- Horizontal Positional Accuracy Report:
- Since the thalweg represents a geological interpretation, its absolute positional accuracy cannot be determined. However, the thalweg line is estimated to fall within 250 m of the bedrock low, as depicted on the bedrock topography map.
- Lineage:
- Process Step:
- Process Description:
- The thalwegs were digitized in the paleoflow direction in ArcMap after completion of the bedrock topography contouring.
- 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: 4
- 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: thalweg_84b_ll.aat
- Entity Type Definition: Line features
- Entity Type Definition Source: Alberta Geological Survey
- Attribute:
- Attribute Label: NAME
- Attribute Definition: Name of buried valley that thalweg occurs in.
- Attribute Definition Source: Alberta Geological Survey
- Overview Description:
- Entity and Attribute Overview:
- The thalweg line represents a line of lowest elevation on the bedrock surface within the buried valleys.
- 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: 20050224
- 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