Journal ArticleDOI
Corals from a dismembered late Paleozoic paleo-Pacific plateau
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TLDR
A coral belonging to the rare Late Mississippian-Early Pennsylvanian Family Pseudopavonidae and a specimen of the Permian waagenophyllid coral genus Parawentzelella have been recovered from the Cache Creek assemblage in northern British Columbia and from a small limestone block in southern British Columbia, Canada, respectively as discussed by the authors.Abstract:
A coral belonging to the rare Late Mississippian–Early Pennsylvanian Family Pseudopavonidae and a specimen of the Permian waagenophyllid coral genus Parawentzelella have been recovered from the Cache Creek assemblage in northern British Columbia and from a small limestone block in southern British Columbia, Canada, respectively. Both of these fossils are closely related to corals known from eastern Japan and western Sze-chuan, China; Parawentzelella also occurs in Indochina. These corals apparently occur in shallow-water carbonates that overlie pieces of oceanic volcanic ridges or plateaus. In both Asia and North America these corals now lie geographically close to coeval, but completely different, coral faunas that lived on shallow carbonate platforms built on continental shelves. This suggests that the circum-Pacific terranes bearing these unusual corals were displaced from a single, shallow-water oceanic region that in late Paleozoic time lay in the paleo-Pacific Ocean far from any continental margin. In Late Permian or early Mesozoic time the region colonized by these fossils was torn apart; the rock masses bearing these fossils were then carried on oceanic plates to subduction zones at continental margins on opposite sides of the Pacific Ocean, where they became lodged.read more
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Journal ArticleDOI
The history of early Mesozoic reef communities; a three-step process
TL;DR: In this article, the evolution of reefs is viewed as a three-step process-steps in which mass extinction events exerted major influences, resulting in the loss of Permian-type holdovers and the rise of large skeletal organisms in the framework buildingguild, which resulted in major changes in the early Mesozoic reef ecosystem.
Journal ArticleDOI
Cache Creek terrane entrapment: Oroclinal paradox within the Canadian Cordillera
TL;DR: In this paper, the authors propose a model that early Mesozoic QN and ST were joined through their northern ends as two adjacent arc festoons that faced south toward the Cache Creek ocean (Panthalassa).
Journal ArticleDOI
Paleoceanography of the tropical eastern pacific ocean.
Richard W. Grigg,Richard Hey +1 more
TL;DR: The fossil record of corals in the eastern Pacific suggests this has been true throughout the Cenozoic, and terranes in the central tropical Pacific likely served as stepping stones to dispersal of tropical shelf faunas, reducing the isolating effect of an otherwise wider Pacific Ocean.
Journal ArticleDOI
Significance of "Tethyan" Fossils in the American Cordillera
TL;DR: The distribution of pre-Cretaceous "Tethyan" faunas is similar to the known pantropic distribution of many Cretaceous and Cenozoic tropical biotas, which can better account for the distribution patterns of many Paleozoic and early Mesozoic "Tithyan" species in the American Cordillera.
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