Depositional environments and stratigraphic architecture of the Late Cretaceous Milk River and Eagle formations, southern Alberta and north-central Montana: relationships to shallow biogenic gas

2003 ◽  
Vol 51 (2) ◽  
pp. 155-176 ◽  
Author(s):  
T. H.D. Payenberg
Keyword(s):  
Late Cretaceous ◽  
Depositional Environments ◽  
North Central ◽  
Biogenic Gas ◽  
Stratigraphic Architecture ◽  
Southern Alberta ◽  
Central Montana

Litho- and chronostratigraphic relationships of the Santonian–Campanian Milk River Formation in southern Alberta and Eagle Formation in Montana utilising stratigraphy, U–Pb geochronology, and palynology

2002 ◽  
Vol 39 (10) ◽  
pp. 1553-1577 ◽  
Author(s):  
Tobias HD Payenberg ◽  
Dennis R Braman ◽  
Donald W Davis ◽  
Andrew D Miall
Keyword(s):  
Late Cretaceous ◽  
Depositional Environments ◽  
North Central ◽  
Zircon Age ◽  
Southern Alberta ◽  
Central Montana ◽  
Milk River Formation ◽  
Eagle Formation ◽  
Provincial Park

U–Pb geochronology, palynology, and lithostratigraphy were employed on the Late Cretaceous rocks in southern Alberta and Montana to solve litho- and chronostratigraphic correlation problems. In the outcrop area around Writing-On-Stone Provincial Park, southern Alberta, the Milk River Formation has a Santonian to possibly very earliest Campanian age and was deposited between ~84.5 Ma and 83.5 Ma. In southern Montana, the Eagle Formation was deposited from ~83.5 Ma to 81.2 Ma, and contains different lithologies and depositional environments as opposed to southern Alberta. In north-central Montana, the Telegraph Creek Formation and Virgelle and Deadhorse Coulee members are equivalent in depositional environments and time to those of the Milk River Formation in southern Alberta. The upper Eagle member, however, has no time- or facies-equivalent rocks around Writing-On-Stone Provincial Park, but is time equivalent to the Alderson Member of the Lea Park Formation in southeastern Alberta. A hiatus of ~2.5 Ma is present between the top of the Milk River Formation in the outcrop area and the basal beds of the Pakowki Formation. The Pakowki transgression occurred at around 81.0 Ma based on a U–Pb zircon age of 80.7 ± 0.2 Ma from bentonite beds just above the bottom of the Pakowki Formation in southern Alberta. This age agrees with previous ages of 80.7 ± 0.6 Ma for the Ardmore Bentonite Beds and ~81.0 Ma for the Claggett transgression in southern Montana.

Paleomagnetism of the Late Cretaceous-Early Tertiary north-central Montana Alkalic Province

1983 ◽  
Vol 88 (B12) ◽  
pp. 10593-10609 ◽  
Author(s):  
J. F. Diehl ◽  
M. E. Beck ◽  
S. Beske-Diehl ◽  
D. Jacobson ◽  
B. C. Hearn
Keyword(s):  
Late Cretaceous ◽  
North Central ◽  
Early Tertiary ◽  
Central Montana

scholarly journals Assessment of undiscovered biogenic gas resources, North-central Montana Province

Fact Sheet ◽  
2008 ◽  
Author(s):  
Jennie L. Ridgley ◽  
Lawrence O. Anna ◽  
Steven M. Condon ◽  
Neil S. Fishman ◽  
Timothy C. Hester ◽  
...  
Keyword(s):  
North Central ◽  
Biogenic Gas ◽  
Central Montana
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