scholarly journals The accepted values for the internal Geological Survey of Canada (GSC) 9107 Rock-Eval 6 standard (Upper Cretaceous Second White Speckled Shale, Colorado Group), western Canada

2016 ◽  
Author(s):  
O H Ardakani ◽  
H Sanei ◽  
L R Snowdon ◽  
P M Outridge ◽  
M Obermajer ◽  
...  
Keyword(s):  
Upper Cretaceous ◽  
Geological Survey ◽  
Western Canada ◽  
Colorado Group ◽  
Rock Eval

Ichnology and Sedimentology of a Mud-Dominated Deltaic Coast: Upper Cretaceous Alderson Member (Lea Park Fm), Western Canada

2008 ◽  
Vol 78 (12) ◽  
pp. 803-824 ◽  
Author(s):  
J. Hovikoski ◽  
R. Lemiski ◽  
M. Gingras ◽  
G. Pemberton ◽  
J. A. MacEachern
Keyword(s):  
Upper Cretaceous ◽  
Western Canada

An Early Cretaceous (Berriasian) fossil-bearing locality from the Rocky Mountains of Alberta, yielding the oldest dinosaur skeletal remains from western Canada

2020 ◽  
Vol 57 (4) ◽  
pp. 542-552 ◽  
Author(s):  
Ramon S. Nagesan ◽  
James A. Campbell ◽  
Jason D. Pardo ◽  
Kendra I. Lennie ◽  
Matthew J. Vavrek ◽  
...  
Keyword(s):  
North America ◽  
Early Cretaceous ◽  
Depositional Environment ◽  
Upper Cretaceous ◽  
Upper Jurassic ◽  
High Energy ◽  
Western Canada ◽  
Western North America ◽  
Terrestrial Vertebrate ◽  
Overlying Strata

Western North America preserves iconic dinosaur faunas from the Upper Jurassic and Upper Cretaceous, but this record is interrupted by an approximately 20 Myr gap with essentially no terrestrial vertebrate fossil localities. This poorly sampled interval is nonetheless important because it is thought to include a possible mass extinction, the origin of orogenic controls on dinosaur spatial distribution, and the origin of important Upper Cretaceous dinosaur taxa. Therefore, dinosaur-bearing rocks from this interval are of particular interest to vertebrate palaeontologists. In this study, we report on one such locality from Highwood Pass, Alberta. This locality has yielded a multitaxic assemblage, with the most diagnostic material identified so far including ankylosaurian osteoderms and a turtle plastron element. The fossil horizon lies within the upper part of the Pocaterra Creek Member of the Cadomin Formation (Blairmore Group). The fossils are assigned as Berriasian (earliest Cretaceous) in age, based on previous palynomorph analyses of the Pocaterra Creek Member and underlying and overlying strata. The fossils lie within numerous cross-bedded sandstone beds separated by pebble lenses. These sediments are indicative of a relatively high-energy depositional environment, and the distribution of these fossils over multiple beds indicates that they accumulated over multiple events, possibly flash floods. The fossils exhibit a range of surface weathering, having intact to heavily weathered cortices. The presence of definitive dinosaur material from near the Jurassic–Cretaceous boundary of Alberta establishes the oldest record of dinosaur body fossils in western Canada and provides a unique opportunity to study the Early Cretaceous dinosaur faunas of western North America.

scholarly journals I.—On Some Fossil Ostracoda from S.-W. Wyoming, and from Utah, U.S.A.

1893 ◽  
Vol 10 (9) ◽  
pp. 385-391 ◽  
Author(s):  
T. Rupert Jones
Keyword(s):  
Upper Cretaceous ◽  
Geological Survey ◽  
Dilute Acid ◽  
Similar Material ◽  
Bear River ◽  
The U.S ◽  
Geological Magazine

In 1885 Dr. C. A. White, F.C.G.S., Palæontologist to the U.S. Geological Survey, supplied me with some of the siliceous residue of a limestone belonging to the freshwater Jurassic Atlantosaurus-beds in Colorado, from which several casts of small Ostracoda were figured and described in the GEOLOGICAL MAGAZINE, Dec. III. Vol. III. April, 1886, pp. 145–8, Pl. IV. Since that time Dr. White has kindly sent me somewhat similar material, obtained in like manner, by dissolving in dilute acid pieces of an impure limestone, which lies at the base of the Upper Cretaceous Series, from Cokeville, a hamlet in South-Western Wyoming, and belongs to the Bear-River Formation. The Ostracoda selected are figured in Plate XV. Figs. 1–9, 11–13, and 15. These casts represent the whole carapace in many if not all instances.

The Denholm landslide, Saskatchewan. Part I: Geology

1983 ◽  
Vol 20 (2) ◽  
pp. 197-207 ◽  
Author(s):  
E. A. Christiansen
Keyword(s):  
Shear Zone ◽  
Radiocarbon Dating ◽  
Upper Cretaceous ◽  
Average Rate ◽  
Surface Expression ◽  
Recent Time ◽  
Displacement Rate ◽  
The North ◽  
Colorado Group ◽  
Judith River Formation

The Denholm landslide, whose surface is composed of scarps, ridges, and elongated depressions, is 160 m high, 2000 m wide, and up to 100 m thick. The shear zone is in silty, montomorillonitic clay of the upper part of the Lea Park Formation and Upper Colorado Group unit. The Upper Cretaceous Judith River Formation and the Quaternary Empress, Sutherland, and Saskatoon groups were affected by the landslide. Although these sediments were fractured and gravity faulted by tension when the landslide moved, they can be readily traced through the landslide, particularly the upper part. The scarps (gravity faults), ridges (horsts), and elongated depressions (grabens) are the surface expression of tension resulting from the stretching of beds during the landslide.The movement of the landslide is thought to have started when the North Saskatchewan spillway eroded to the level of the present shear zone about 11 000 years ago (established by radiocarbon dating) and is believed to have stopped in recent time. During this time, it moved about 390 m across the North Saskatchewan River alluvium at an average rate of 35 mm per year. As the landslide moved across the valley, it encountered deposition of alluvium at an average rate of about 2.4 mm per year which resulted in the curved shear zone on the alluvium. Keywords: retrogressive landslide, shale-alluvium, displacement, rate, age.

Paleoenvironmental changes in the Cretaceous (Albian to Turonian) Colorado Group of western Canada: microfossil, sedimentological and geochemical evidence

1996 ◽  
Vol 17 (3) ◽  
pp. 311-365 ◽  
Author(s):  
C.J. Schröder-Adams ◽  
D.A. Leckie ◽  
J. Bloch ◽  
J. Craig ◽  
D.J. McIntyre ◽  
...  
Keyword(s):  
Western Canada ◽  
Geochemical Evidence ◽  
Paleoenvironmental Changes ◽  
Colorado Group

THE APPLICATION OF A NEW NOMENCLATURAL APPROACH TO UPPER CRETACEOUS PLANT MICROFOSSILS FROM WESTERN CANADA

1957 ◽  
Vol 35 (3) ◽  
pp. 349-375 ◽  
Author(s):  
Glenn E. Rouse
Keyword(s):  
New Species ◽  
Historical Development ◽  
Upper Cretaceous ◽  
Vancouver Island ◽  
Western Canada ◽  
New Genera ◽  
Southern Alberta ◽  
Plant Microfossils ◽  
New System

A new system of nomenclature is proposed with the purpose of presenting a scheme which will be applicable to spores, pollens, and other microfossils from all geological ages. A review of previous nomenclatural systems is presented to indicate the historical development of microfossil nomenclature. The applicability of the new system is illustrated by naming 21 new species and four new genera of Upper Cretaceous microfossils from the Comox formation of Vancouver Island and the Oldman formation of southern Alberta. The microfossil conspecti are briefly compared with the assemblage previously reported from the Brazeau formation of western Alberta. Advantages of the new nomenclatural scheme are discussed in the light of future discoveries of plant microfossils, and their application to palaeobotanical and geological problems.

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