Middle and early upper devonian Rhynchonelloid Brachiopods from western Canada

1962 ◽  
Author(s):  
D J McLaren
Keyword(s):  
Upper Devonian ◽  
Western Canada ◽  
Early Upper

On the Occurrence of Psilophyton princeps in the Early Upper Devonian of New York

1961 ◽  
Vol 48 (6) ◽  
pp. 473 ◽  
Author(s):  
F. M. Hueber ◽  
J. D. Grierson
Keyword(s):  
New York ◽  
Upper Devonian ◽  
Early Upper

Monelasmina besti, a new Schizophoriid Brachiopod from the Upper Devonian of Western Canada

1959 ◽  
Vol 96 (6) ◽  
pp. 470-472 ◽  
Author(s):  
A. E. H. Pedder
Keyword(s):  
New Species ◽  
Northwest Territories ◽  
Upper Devonian ◽  
Western Canada ◽  
A New Species

AbstractMonelasmina, previously known only from the Frasnian of Europe, is described and figured from the Hay River formation (Frasnian) of the Northwest Territories, Canada. The specimens are referred to a new species, M. besti.

Devonian Boring Algae or Fungi Associated with Micrite Tubules

1974 ◽  
Vol 11 (11) ◽  
pp. 1606-1610 ◽  
Author(s):  
David R. Kobluk ◽  
Michael J. Risk
Keyword(s):  
Upper Devonian ◽  
Western Canada ◽  
Reef Complex

The process of skeletal micritization by boring thallophytes (algae and fungi) is known from modern carbonate environments and probably occurred as far back as the Ordovician. Boring thallophytes, probably fungi, possibly algae, were the cause of at least some skeletal micritization in Devonian reef complexes in western Canada. In situ endolithic filaments, of 3 μm and 5 μm diameter, occur associated with a micrite rim and micrite tubules in the corallite of an Upper Devonian tetracoral from the Miette reef complex. The filaments are found in the micrite rim around the coral, in the micrite tubules, and in unmicritized parts of the corallite, often oriented normal to the corallite wall and with the same trend as the tubules. Infestation and micritization began well before the corallite was buried, probably while the coral was alive, and continued for some time after death.

VIII.—On a New Long-headed Dipnoan Fish from the Upper Devonian of Scaumenac Bay, P.Q., Canada

1937 ◽  
Vol 59 (1) ◽  
pp. 241-266 ◽  
Author(s):  
W. Graham-Smith ◽  
T. S. Westoll
Keyword(s):  
British Museum ◽  
Upper Devonian ◽  
Museum Collections ◽  
Present Account ◽  
New Form ◽  
Devonian Age ◽  
Early Upper

The well-known deposits of early Upper Devonian age at Scaumenac Bay, P.Q., Canada, have yielded numerous specimens of the rather primitive Dipnoan which is now known as Scaumenacia curta (Whiteaves). During the summer of 1984 one of the authors (W. G.-S.) obtained at this locality three specimens of a very distinct new Dipnoan, characterised by an elongated head and other features. Three other specimens of this new form [No. P. 6785 in the British Museum (Nat. Hist.), the anal fin-skeleton of which was figured by Woodward (1893, p. 241) under the name Scaumenacia curta (Whiteaves), and two in the Royal Scottish Museum] were subsequently recognised in museum collections, but the present account is based entirely on the three specimens mentioned above. From these it has been possible to describe almost the whole skeleton, except the endocranium, and to compare it, in some detail, with those of other primitive Dipnoi; in this comparison we have used the results of work by Porster-Cooper (1937) on Dipterus and by one of the present authors (T. S. W., nearing completion) on certain primitive Dipnoi.

Organic facies in Devonian and Mississippian strata of Western Canada Sedimentary Basin: relation to kerogen type, paleoenvironment, and paleogeography

2004 ◽  
Vol 52 (3) ◽  
pp. 234-255 ◽  
Author(s):  
L.D. Stasiuk ◽  
M.G. Fowler
Keyword(s):  
Shallow Water ◽  
Sedimentary Basin ◽  
Black Shales ◽  
Upper Devonian ◽  
Source Rocks ◽  
Western Canada ◽  
Western Canada Sedimentary Basin ◽  
Organic Facies ◽  
Kerogen Type ◽  
Canada Sedimentary Basin

Abstract Petrographic analyses of dispersed organic matter (including macerals and palynomorphs), siliceous and calcareous microfossil assemblages and microtextures (e.g. stromatolitic) have been used to define and interpret five organic facies and regionally map their distribution for the following informal groupings of potential hydrocarbon source rocks in the Western Canada Sedimentary Basin: Upper Devonian Woodbend group, Upper Devonian Winterburn group and Upper Devonian to Lower Mississippian black shales of the Exshaw and Bakken formations. Five petrographic organic facies (A–E) are defined for the potential source rocks based on assemblages of alginites, acritarchs, sporinites, siliceous microfossils and algal mat microtextures. Organic facies A, B (prasinophyte alginites and acritarchs) and C (coccoidal alginite), represent accumulation in relatively deep (basin), intermediate (shelf-platform), and shallow water depths (bank-reef margin to lagoonal). Organic facies D is defined by siliceous microfossils (e.g. Radiolaria) and accumulated in deep basinal to outer shelf settings immediately east of an ancient Pacific Ocean, or south of an ancient Arctic Ocean. This facies may reflect regions of upwelling which extended into intracratonic and epicontinental settings. Organic facies E, characterized by stromatolitic microtextures with or without coccoidal alginite, only occur within Upper Devonian Winterburn Group shallow water, restricted shelf to lagoonal dolostones associated with evaporites. As a whole, the regional distribution of organic facies is related to paleogeography, paleobathymetry or paleostructure in the source rocks. Surprisingly, petrographic organic facies do not show strong positive correlation with kerogen type as defined by Hydrogen-Oxygen indices or TOC-S2 plots.

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