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Willow Creek Formation

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Journal Article

First mammal from the Willow Creek Formation: a new early Paleocene ptilodontid (Mammalia, Multituberculata) from near Calgary, Alberta, Canada

Craig S. Scott
Published: 07 May 2021
Canadian Journal of Earth Sciences (2021) 58 (6): 505–518.
DOI: https://doi.org/10.1139/cjes-2020-0151
... communities more generally. I report on a new multituberculate from the early Paleocene of southwestern Alberta, in rocks of the Willow Creek Formation, the first such occurrence in this otherwise poorly known unit. The new multituberculate, Aenigmamys aries gen. et sp. nov., most closely resembles...
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Latest Cretaceous eggshell assemblage from the Willow Creek Formation (upper Maastrichtian – lower Paleocene) of Alberta, Canada, reveals higher dinosaur diversity than represented by skeletal remains

Darla K. Zelenitsky, François Therrien, Kohei Tanaka, Philip J. Currie, Christopher L. DeBuhr
Published: 14 September 2016
Canadian Journal of Earth Sciences (2017) 54 (2): 134–140.
DOI: https://doi.org/10.1139/cjes-2016-0080
...Darla K. Zelenitsky; François Therrien; Kohei Tanaka; Philip J. Currie; Christopher L. DeBuhr Abstract The Willow Creek Formation (upper Maastrichtian – lower Paleocene) of southwestern Alberta is a poorly fossiliferous formation that preserves a low end-Cretaceous dinosaur diversity compared...
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Journal Article

THE PROBLEM OF THE WILLOW CREEK FORMATION

Loris S. Russell
Published: 01 February 1965
Canadian Journal of Earth Sciences (1965) 2 (1): 11–14.
DOI: https://doi.org/10.1139/e65-002
...Loris S. Russell Abstract The Willow Creek formation of south western Alberta is known to include both Upper Cretaceous and Paleocene deposits in the disturbed belt of the foothills. On the plains to the east, however, the Cretaceous portion may be absent, and the formation may rest unconformably...
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Journal Article

Geology and Timing of Ore Formation in the Willow Creek Gold District, Talkeetna Mountains, Southern Alaska

Stephen S. Harlan, Richard M. Vielreicher, James M. Mortensen, Dwight C. Bradley, Richard J. Goldfarb, Lawrence W. Snee, Allison B. Till
Journal: Economic Geology
Published: 01 August 2017
Economic Geology (2017) 112 (5): 1177–1204.
DOI: https://doi.org/10.5382/econgeo.2017.4506
... sericite associated with formation of the gold-bearing veins, and the age of a muscovite from a weakly mineralized pegamatite that cuts the Willow Creek pluton. In contrast to previous studies that suggested that at least some mineralization was Eocene in age, we found no compelling evidence...
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Outcrop distribution of the Willow Creek Formation in southwestern Alberta,...

Published: 01 December 2010
Fig. 1. Outcrop distribution of the Willow Creek Formation in southwestern Alberta, and the location of the studied outcrop sections.
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Classification of Willow Creek Formation sandstones (after Pettijohn et al...

Published: 01 December 2010
Fig. 4. Classification of Willow Creek Formation sandstones (after Pettijohn et al., 1987 ).
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Generalized diagenetic sequence for the Willow Creek Formation.

Published: 01 December 2010
Fig. 11. Generalized diagenetic sequence for the Willow Creek Formation.
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Vertical profile for the Oldman River, lower Willow Creek Formation (Maastr...

Published: 01 September 2009
Fig. 16. Vertical profile for the Oldman River, lower Willow Creek Formation (Maastrichtian). The table shows the sandstone composition in terms of relative percentages of the main authigenic clay minerals. Zero datum is the base of the outcrop section.
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Outcrop distribution of the Scollard, Coalspur, and Willow Creek formations...

Published: 01 September 2009
Fig. 1. Outcrop distribution of the Scollard, Coalspur, and Willow Creek formations in Alberta, and the location of the outcrop sections. Section numbers (4–18) refer to figure numbers.
Journal Article

Montana Group Stratigraphy, Lewis and Clark County, Montana

George W. Viele, Frank G. Harris, III
Journal: AAPG Bulletin
Published: 01 April 1965
AAPG Bulletin (1965) 49 (4): 379–417.
DOI: https://doi.org/10.1306/A663362C-16C0-11D7-8645000102C1865D
... the Telegraph Creek, Virgelle, Two Medicine, Bearpaw, Horsethief, St. Mary River, and Willow Creek Formations, aggregating about 5,000 feet in thickness. The basal formations of the Montana Group, the Telegraph Creek and Virgelle, are regressive shallow-marine and lagoonal feldspathic sandstones and shales...
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SEM photomicrographs: (A) – smectite and authigenic dickite pore-filling. N...

Published: 01 December 2010
Fig. 6. SEM photomicrographs: (A) – smectite and authigenic dickite pore-filling. Note the remnant of authigenic kaolinite between dickite crystals (sample C12, lower Willow Creek Formation, Oldman River Dam Reservoir); (B) – authigenic smectite formed as pore-lining clay (sample 3, lower Willow
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SEM photomicrographs: (A) – authigenic illite and minute amount of quartz o...

Published: 01 December 2010
Fig. 7. SEM photomicrographs: (A) – authigenic illite and minute amount of quartz overgrowth. Note the role of illite coating on silica cementation (sample B12, upper Willow Creek Formation, Oldman River Dam Reservoir); (B) – illitization of kaolin minerals and smectite. Note that the timing
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Thin section photomicrographs were taken under cross-polarizers: (A) – quar...

Published: 01 December 2010
Fig. 5. Thin section photomicrographs were taken under cross-polarizers: (A) – quartz and chert grains “floating” in calcite cement. Note the corrosion of quartz grain by calcite cement which occurred during late diagenesis (sample 10, lower Willow Creek Formation, Oldman River Dam Reservoir
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SEM and thin section photomicrographs: (A) – quartz grains “floating” in ca...

Published: 01 December 2010
Fig. 12. SEM and thin section photomicrographs: (A) – quartz grains “floating” in calcite cement. Note the loose grain packing and undeformed muscovite grain (sample 17, lower Willow Creek Formation, Oldman River Dam Reservoir); (B) – quartz grains. Note the presence of long, con-cavo-convex
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Scanning electron photomicrographs: (A) euhedral growth of authigenic albit...

Published: 01 September 2009
Fig. 23. Scanning electron photomicrographs: (A) euhedral growth of authigenic albite (sample D-1, lower Willow Creek Formation, Crowsnest River locality); (B) euhedral growth of authigenic quartz (sample 14, upper Scollard Formation, Red Deer River section 1); (C) intercalation of dickite
Journal Article

CRETACEOUS STRATIGRAPHY OF THE GLACIER NATIONAL PARK AREA, NORTHWESTERN MONTANA

D. D. Rice, W. A. Cobban
Published: 01 August 1977
Bulletin of Canadian Petroleum Geology (1977) 25 (4): 828–841.
DOI: https://doi.org/10.35767/gscpgbull.25.4.828
... of the Disturbed belt. Another nonmarine unit, the Willow Creek Formation, overlies the St. Mary River Formation. The Willow Creek consists of about 800 ft (244 m) of variegated clayey rocks and sandstone. The top of the Cretaceous is somewhere within this formation. 1 U.S. Geological Survey, Box 25046...
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Basin-scale distribution of authigenic clay minerals in the Late Maastrichtian–Early Paleocene fluvial strata of the Alberta foredeep: implications for burial depth

A. Khidir, O. Catuneanu
Published: 01 September 2009
Bulletin of Canadian Petroleum Geology (2009) 57 (3): 251–274.
DOI: https://doi.org/10.2113/gscpgbull.57.3.251
...Fig. 16. Vertical profile for the Oldman River, lower Willow Creek Formation (Maastrichtian). The table shows the sandstone composition in terms of relative percentages of the main authigenic clay minerals. Zero datum is the base of the outcrop section. ...
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Journal Article

UPPER CRETACEOUS STRATIGRAPHY AND MICROPALEONTOLOGY OF THE CROWSNEST PASS - WATERTON AREA, SOUTHERN ALBERTA FOOTHILLS

John H. Wall, R. K. Rosene
Published: 01 August 1977
Bulletin of Canadian Petroleum Geology (1977) 25 (4): 842–867.
DOI: https://doi.org/10.35767/gscpgbull.25.4.842
... the Maestrichtian are represented, consists of alternating phases of marine, littoral or deltaic, and continental deposition. In ascending order, the major rock units consist of the Alberta Group (Blackstone, Cardium and Wapiabi Formations), Belly River, Bearpaw, Blood Reserve, St. Mary River and Willow Creek...
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Vertical profiles for the Oldman River locality, upper Willow Creek Formati...

Published: 01 December 2010
Fig. 3. Vertical profiles for the Oldman River locality, upper Willow Creek Formation (Paleocene) and Oldman River Dam Reservoir, lower Willow Creek Formation (Maastrichtian). The table shows the locations of the samples analyzed in the study area. The Zero datum is the base of the outcrop
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SEM and thin section photomicrographs was taken under plane light: (A) – Se...

Published: 01 December 2010
Fig. 8. SEM and thin section photomicrographs was taken under plane light: (A) – Secondary leaching of plagioclase feldspar and development of secondary porosity (sample C4, lower Willow Creek Formation, Oldman River Dam Reservoir); (B) – preserved unfilled part of the primary porosity by early