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OFR 2013-17

Subsurface stratigraphic picks for the Milk River shoulder, Alberta Plains: including tops for the Milk River Formation and Alderson Member of the Lea Park Formation

Abstract: This report provides the documentation to accompany a Digital Dataset of 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 deflection on resistivity, sonic, density, and porosity logs. The Milk River 'shoulder' corresponds to the top of the Milk River Formation in southern Alberta, where it represents a juxtaposition of 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 log 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. Place Keywords 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 canada Theme Keywords alberta plains bedrock geology lea park formation mapping milk river formation pakowki formation stratigraphic picks stratigraphy subsurface mapping upper cretaceous well log signature

Glombick, P.M.  Mumpy, A.J.  2014-05-08

OFR 2011-08

Tops of the Horseshoe Canyon, Wapiti and Battle Formations in the West-Central Alberta Plains: Subsurface Stratigraphic Picks and Modelled Surface

Tops of the Horseshoe Canyon, Wapiti and Battle Formations in the West-Central Alberta Plains: Subsurface Stratigraphic Picks and Modelled Surface Representative geophysical logs are included to demonstrate the criteria used to make picks and to ... Show Abstract

Hathway, B.  2011-07-21

DIG 2014-0024

Subsurface Stratigraphic Picks for the Beaverhill Lake Group and adjacent strata of the Elk Point Point and Woodbend groups, Alberta Plains (tabular data, tab delimited format, to accompany Open File Report 2014-05)

Subsurface Stratigraphic Picks for the Beaverhill Lake Group and adjacent strata of the Elk Point Point and Woodbend groups, Alberta Plains (tabular data, tab delimited format, to accompany Open File Report 2014-05) The dataset includes subsurface ... Show Abstract

Hauck, T.E.  2014-08-18

DIG 2013-0029

Subsurface Stratigraphic Picks for the Base of the Belly River Group/Wapiti Formation, Alberta Plains (tabular data, tab delimited format)

Subsurface Stratigraphic Picks for the Base of the Belly River Group/Wapiti Formation, Alberta Plains (tabular data, tab delimited format) The dataset includes subsurface stratigraphic picks for the base of the Belly River Group/Wapiti Formation in ... Show Abstract

Glombick, P.M.  2014-05-08

DIG 2012-0022

Twentieth Percentile Modelled Base of the Paskapoo Formation, Alberta (Gridded data, ASCII format)

Alberta Geological Survey differentiates the Paskapoo Formation from the underlying Scollard Formation by the first thick sandstone above the uppermost coal seam of the Ardley coal zone. Because of uncertainty in defining the Paskapoo-Scollard ... Show Abstract

Lyster, S.  Andriashek, L.D.  Hathway, B.  2012-09-12

DIG 2013-0025

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 ... Show Abstract

Glombick, P.M.  Mumpy, A.J.  2014-05-08

DIG 2011-0002

Tops of the Horseshoe Canyon, Wapiti and Battle Formations in the West-Central Alberta Plains: Subsurface Stratigraphic Picks and Modelled Surface (tabular data, tab delimited format, to accompany Open File Report 2011-08)

Tops of the Horseshoe Canyon, Wapiti and Battle Formations in the West-Central Alberta Plains: Subsurface Stratigraphic Picks and Modelled Surface (tabular data, tab delimited format, to accompany Open File Report 2011-08) The dataset includes ... Show Abstract

Hathway, B.  2011-12-07