Late Cretaceous Diversification of Cupressaceous Conifers: A Taiwanioid Seed Cone from the Eden Main, Vancouver Island, British Columbia, Canada

2020 ◽  
Vol 181 (5) ◽  
pp. 529-541 ◽  
Author(s):  
Ruth A. Stockey ◽  
Gar W. Rothwell ◽  
Brian A. Atkinson
Keyword(s):  
British Columbia ◽  
Late Cretaceous ◽  
Vancouver Island ◽  
Seed Cone

The Lions Gate Member: A New Late Cretaceous Sedimentary Subdivision in the Vancouver Area of British Columbia

1975 ◽  
Vol 12 (3) ◽  
pp. 464-471 ◽  
Author(s):  
G. E. Rouse ◽  
W. H. Mathews ◽  
R. H. Blunden
Keyword(s):  
British Columbia ◽  
Late Cretaceous ◽  
Vancouver Island ◽  
Granitic Rocks ◽  
The South ◽  
Plutonic Belt ◽  
South Shore

Sediments bordering Burrard Inlet in Greater Vancouver are described as the Lions Gate Member of the Burrard Formation. This new member, comprising the lowest part of the previously defined Burrard Formation, rests nonconformably upon deeply weathered granitic rocks of the Coast Plutonic belt, and dips southwards into the Whatcom Basin. Four sedimentary units are recognizable, comprising a basal unit of conglomerate with minor sandstone lenticles; a sandstone–siltstone unit; a shale unit; and an upper coarse arkose. The upper contact with overlying sandstone and shales of Tertiary age occurs on the south shore of Burrard Inlet. Palynomorphs from both surface and borehole samples are of Late Cretaceous (Campanian) age, suggesting correlation of the Lions Gate Member with the Extension-Protection Formation of eastern Vancouver Island.

A new dromioid crab from the late Campanian of Hornby Island, Canada

2020 ◽  
Vol 295 (2) ◽  
pp. 141-147
Author(s):  
Torrey Nyborg ◽  
Alessandro Garassino ◽  
Richard L.M. Ross
Keyword(s):  
British Columbia ◽  
North America ◽  
Late Cretaceous ◽  
Vancouver Island ◽  
First Report

We report Sabellidromites lanae n. sp. (Crustacea, Decapoda, Dromiidae) from the Late Cretaceous (late Campanian) of Hornby Island, British Columbia (Canada). Sabellidromites lanae n. sp. is the first report of a dromioid crab from Nanaimo Group of Vancouver Island and the first report for the genus in North America, enlarging its palaeogeographic range.

Marine reptiles from the Nanaimo Group (Upper Cretaceous) of Vancouver Island

2002 ◽  
Vol 39 (11) ◽  
pp. 1591-1603 ◽  
Author(s):  
Elizabeth L Nicholls ◽  
Dirk Meckert
Keyword(s):  
British Columbia ◽  
Late Cretaceous ◽  
Upper Cretaceous ◽  
New Genus ◽  
Pacific Coast ◽  
Vancouver Island ◽  
The Other ◽  
Western Interior Seaway ◽  
Marine Reptiles ◽  
The Pacific

A new fauna of fossil marine reptiles is described from the Late Cretaceous Nanaimo Group of Vancouver Island. The fossils are from the Haslam and Pender formations (upper Santonian) near Courtenay, British Columbia, and include elasmosaurid plesiosaurs, turtles, and mosasaurs. This is only the second fauna of Late Cretaceous marine reptiles known from the Pacific Coast, the other being from the Moreno Formation of California (Maastrichtian). The new Nanaimo Group fossils are some 15 million years older than those from the Moreno Formation. However, like the California fauna, there are no polycotylid plesiosaurs, and one of the mosasaurs is a new genus. This reinforces the provinciality of the Pacific faunas and their isolation from contemporaneous faunas in the Western Interior Seaway.

scholarly journals The first record of a trionychid turtle (Testudines: Trionychidae) from the Cretaceous of the Pacific Coast of North America

2018 ◽  
Vol 5 ◽  
Author(s):  
Matthew J. Vavrek ◽  
Donald B. Brinkman
Keyword(s):  
British Columbia ◽  
North America ◽  
Late Cretaceous ◽  
Rocky Mountains ◽  
Pacific Coast ◽  
First Record ◽  
Vancouver Island ◽  
The Pacific ◽  
Western Interior Basin ◽  
Cretaceous Deposits

Trionychid turtles were widespread throughout much of the Western Interior Basin of North America during the Cretaceous, represented by a wide variety of taxa. Despite their widespread abundance east of the Rocky Mountains, they have not previously been reported from Cretaceous deposits along the Pacific Coast of North America. We report here on an isolated trionychid costal from Vancouver Island, British Columbia. The fossil was recovered from the Late Cretaceous (Turonian to Maastrichtian) Nanaimo Group, on Vancouver Island, British Columbia. While the fossil is generically indeterminate, its presence adds an important datapoint in the biogeographic distribution of Trionychidae.  

Zeolite Fades Metamorphism of the Late Cretaceous Nanaimo Group, Vancouver Island and Gulf Islands, British Columbia

1974 ◽  
Vol 11 (2) ◽  
pp. 280-284 ◽  
Author(s):  
Richard J. Stewart ◽  
Richard J. Page
Keyword(s):  
British Columbia ◽  
Late Cretaceous ◽  
Chemical Potential ◽  
Vancouver Island ◽  
High Chemical ◽  
Fold Belts ◽  
Carbonate Cementation ◽  
Gulf Islands

Laumontite and heulandite are extensively developed as metamorphic minerals in sandstones of the Late Cretaceous Nanaimo Group, Vancouver Island and Gulf Islands, British Columbia. Major post-depositional changes in the sandstones also include widespread carbonate cementation and replacement, alteration of plagioclase and biotite, and development of a phyllosilicate matrix. The sequence apparently is depth-zoned, with heulandite present only in the upper 1000 m of section, and laumontite developed in the upper 2500 m. The zeolite assemblages probably were developed during burial metamorphism, as subject to controls of permeability and suppression by a high chemical potential of CO2. Comparable assemblages should be expected in similar clastic sequences found in other portions of the Cordillera, particularly the thick Mesozoic successions of the Intermontane and Insular Fold Belts.

An early Chamaecyparis (Cupressaceae) from the Late Cretaceous of Vancouver Island, British Columbia, Canada

1994 ◽  
Vol 72 (12) ◽  
pp. 1787-1796 ◽  
Author(s):  
E. E. McIver
Keyword(s):  
British Columbia ◽  
Key Words ◽  
Late Cretaceous ◽  
Upper Cretaceous ◽  
Vancouver Island ◽  
Fossil Remains ◽  
Extant Species

Fossil remains of a Chamaecyparis-like member of the Cupressaceae occur in the Upper Cretaceous Comox Formation of Vancouver Island, British Columbia. The cedar bore both flattened, opposite-branching foliage of the Cupressinocladus interruptus type, as well as alternate-branching foliage more similar to that of extant Thuja. Seed cones attached to the foliage are minute, about 3.0 mm in diameter, and consist of four cone scales with abaxial, leaflike umbos. Despite their small size, the structure of the cones and their disposition on axes resembles those of extant species of Chamaecyparis. It is apparent that the Comox cedar is closely related to extant Chamaecyparis and appears to represent an early member of the clade. These data challenge the hypothesis that Chamaecyparis evolved from a Cupressus-like ancestor with large, many-scaled seed cones and terete branches. Key words: Cupressaceae, Chamaecyparis, Late Cretaceous, fossil, seed cones, evolution.

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