Subsurface Stratigraphic Picks for the Top of the Milk River 'shoulder', Alberta Plains (tabular data, tab delimited format, to accompany Open File Report 2013-17)

The dataset includes subsurface stratigraphic picks of the Milk River 'shoulder' in the Alberta Plains (Townships 1 to 73, Ranges 1W4 to 2W6) made from wireline geophysical well logs. The Milk River 'shoulder' is an informal term often used to refer to a distinctive 'shoulder' (deflection) on resistivity, sonic, density, and porosity logs. The Milk River 'shoulder' corresponds to the top of the Milk River Formation in southernmost Alberta, where it represents juxtaposition between paralic deposits of the underlying Deadhorse Coulee Member of the Milk River Formation and overlying marine shale of the Pakowki Formation. It is characterized by a leftward deflection (decreasing resistivity) upwards across the contact, forming the distinctive 'shoulder signature'. To the north, the Milk River 'shoulder' represents the boundary between the Alderson Member (lower Lea Park Formation) and the upper Lea Park Formation (Pakowki equivalent). In these areas, silty sands and mudstones of the Alderson Member are overlain by shales of the upper Lea Park Formation. Well data were screened to detect errors resulting from deviated wells, as well as incorrect ground and kelly bushing elevation data. We used statistical methods to identify local and regional statistical outliers, which we examined individually.

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• 72E
• 72L
• 72M
• 73D
• 73E
• 73L
• 73M
• 82G
• 82H
• 82I
• 82J
• 82N
• 82O
• 82P
• 83A
• 83B
• 83C
• 83D
• 83E
• 83F
• 83G
• 83H
• 83I
• 83J
• 83K
• 83L
• 83M
• 83N
• 83O
• 83P
• ALBERTA
• ALBERTA-PLAINS
• BEDROCK-GEOLOGY
• CANADA
• GEOSCIENTIFICINFORMATION
• LEA-PARK-FORMATION
• MAPPING
• MILK-RIVER-FORMATION
• PAKOWKI-FORMATION
• STRATIGRAPHIC-PICKS
• STRATIGRAPHY
• SUBSURFACE-MAPPING
• UPPER-CRETACEOUS
• WELL-LOG-SIGNATURE

Additional Info

• Maturity Level 1 (54%)
• Maturity Level 2 (31%)
• Maturity Level 3 (11%)
• Maturity Level 4 (10%)
• Maturity Level 5 (0%)
• Maturity Level 6 (0%)

Field	Value
Last Updated	October 20, 2025, 00:47 (UTC)
Created	October 20, 2025, 00:47 (UTC)
Domain / Topic Domain or topic of the dataset being cataloged.
Title Title for the Dataset.	Subsurface Stratigraphic Picks for the Top of the Milk River 'shoulder', Alberta Plains (tabular data, tab delimited format, to accompany Open File Report 2013-17)
Description A description of the dataset.	The dataset includes subsurface stratigraphic picks of the Milk River 'shoulder' in the Alberta Plains (Townships 1 to 73, Ranges 1W4 to 2W6) made from wireline geophysical well logs. The Milk River 'shoulder' is an informal term often used to refer to a distinctive 'shoulder' (deflection) on resistivity, sonic, density, and porosity logs. The Milk River 'shoulder' corresponds to the top of the Milk River Formation in southernmost Alberta, where it represents juxtaposition between paralic deposits of the underlying Deadhorse Coulee Member of the Milk River Formation and overlying marine shale of the Pakowki Formation. It is characterized by a leftward deflection (decreasing resistivity) upwards across the contact, forming the distinctive 'shoulder signature'. To the north, the Milk River 'shoulder' represents the boundary between the Alderson Member (lower Lea Park Formation) and the upper Lea Park Formation (Pakowki equivalent). In these areas, silty sands and mudstones of the Alderson Member are overlain by shales of the upper Lea Park Formation. Well data were screened to detect errors resulting from deviated wells, as well as incorrect ground and kelly bushing elevation data. We used statistical methods to identify local and regional statistical outliers, which we examined individually.
Tags / Keywords Keywords/tags categorizing the dataset.	72E 72L 72M 73D 73E 73L 73M 82G 82H 82I 82J 82N 82O 82P 83A 83B 83C 83D 83E 83F 83G 83H 83I 83J 83K 83L 83M 83N 83O 83P ALBERTA ALBERTA-PLAINS BEDROCK-GEOLOGY CANADA GEOSCIENTIFICINFORMATION LEA-PARK-FORMATION MAPPING MILK-RIVER-FORMATION PAKOWKI-FORMATION STRATIGRAPHIC-PICKS STRATIGRAPHY SUBSURFACE-MAPPING UPPER-CRETACEOUS WELL-LOG-SIGNATURE
Format (CSV, XLS, TXT, PDF, etc) File format of the dataset.
Dataset Size Dataset size in megabytes.
Metadata Identifier Metadata identifier – can be used as the unique identifier for catalogue entry
Published Date Published date of the dataset.
Time Period Data Span (start date) Start date of the data in the dataset.	2008-01-01
Time Period Data Span (end date) End date of time data in the dataset.	2013-01-01
GeoSpatial Area Data Span A spatial region or named place the dataset covers.

Field	Value
Access category Type of access granted for the dataset (open, closed, service, etc).	unrestricted
License License used to access the dataset.	Open Government Licence - Alberta
Limits on use Limits on use of data.
Location Location of the dataset.	https://open.alberta.ca/opendata/gda-dig_2013_0025
Data Service Data service for accessing a dataset.
Owner Owner of the dataset.
Contact Point Who to contact regarding access?	Alberta Geological Survey
Contact Point Email The email to contact regarding access?
Publisher Publisher of the dataset.
Publisher Email Email of the publisher.
Author Author of the dataset.
Author Email Email of the author.
Accessed At Date the data and metadata was accessed.

Field	Value
Identifier Unique identifier for the dataset.
Language Language(s) of the dataset	English
Link to dataset description A URL to an external document describing the dataset.
Persistent Identifier Data is identified by a persistent identifier.
Globally Unique Identifier Data is identified by a persistent and globally unique identifier.
Contains data about individuals Does the data hold data about individuals?
Contains data about identifiable individuals Does the data hold identifiable data about individual?
Contains Indigenous Data Does the data hold data about Indigenous communities?
Portal Type Platform type of the source portal.

Field	Value
Version Version of the datatset	None
Source Source of the dataset.	https://geodiscover.alberta.ca/geoportal/rest/metadata/item/79e4b0bfb66f407d91dff8747882be1e
Version notes Version notes about the dataset.
Is version of another dataset Link to dataset that it is a version of.
Other versions Link to datasets that are versions of it.
Provenance Text Provenance Text of the data.
Provenance URL Provenance URL of the data.
Temporal resolution Describes how granular the date/time data in the dataset is.
GeoSpatial resolution in meters Describes how granular (in meters) geospatial data is in the dataset.
GeoSpatial resolution (in regions) Describes how granular (in regions) geospatial data is in the dataset.

Field	Value
Indigenous Community Permission Who holds the Indigenous Community Permission. Who to contact regarding access to a dataset that has data about Indigenous communities.
Community Permission Community permission (who gave permission).
The Indigenous communities the dataset is about Indigenous communities from which data is derived.

Field	Value
Number of data rows If tabular dataset, total number of rows.
Number of data columns If tabular dataset, total number of unique columns.
Number of data cells If tabular dataset, total number of cells with data.
Number of data relations If RDF dataset, total number of triples.
Number of entities If RDF dataset, total number of entities.
Number of data properties If RDF dataset, total number of unique properties used by the triples.
Data quality Describes the quality of the data in the dataset.
Metric for data quality A metric used to measure the quality of the data, such as missing values or invalid formats.

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