scholarly journals The distribution of ocean temperatures along the west coast of North America deduced from Ekman's theory of the upwelling of cold water from the adjacent ocean depths / by George F. McEwen.

Author(s):  
George F. McEwen
Keyword(s):  
1989 ◽  
Vol 26 (8) ◽  
pp. 1612-1616 ◽  
Author(s):  
T. P. Poulton ◽  
J. D. Aitken

Sinemurian phosphorites in southeastern British Columbia and southwestern Alberta conform with the "West Coast type" phosphorite depositional model. The model indicates that they were deposited on or near the Early Jurassic western cratonic margin, next to a sea or trough from which cold water upwelled. This suggests that the allochthonous terrane Quesnellia lay well offshore in Sinemurian time. The sea separating Quesnellia from North America was partly floored by oceanic crust ("Eastern Terrane") and partly by a thick sequence of rifted, continental terrace wedge rocks comprising the Purcell Supergroup and overlying Paleozoic sequence. This sequence must have been depressed sufficiently that access of upwelling deep currents to the phosphorite depositional area was not impeded.


Zoosymposia ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 147-150
Author(s):  
ROGER R. SEAPY

Taxonomic characterization of pterotracheoid gastropods, morphological characteristics and occurrence in California Current waters are reviewed. Single species of atlantid (Atlanta californiensis) and carinariid (Carinaria japonica) from these waters are described and illustrated.


2005 ◽  
Vol 14 (1) ◽  
pp. 23-44
Author(s):  
Michel Duquet

Abstract The seventeenth century saw the early stages of significant trading on the west coast of Africa as well as the establishment of permanent settlements in North America by Dutch, French and English explorers, merchants, colonists and missionaries in a period marked by the imperial contest that had been set in motion on the heels of the discovery of America in 1492. The travelers who wrote about their voyages overseas described at length the natives they encountered on the two continents. The images of the North American Indian and of the African that emerged from these travel accounts were essentially the same whether they be of Dutch, French or English origin. The main characteristic in the descriptions of African native populations was its permanent condemnation while representations of the Indian were imbued with sentiments ranging from compassion, censure and admiration. The root causes for this dichotomy were the inhospitable and deadly (to Europeans) tropical environment of Africa’s West Coast and the growing knowledge of local societies that Europeans acquired in North America. The analysis of the contrasting images of natives on both sides of the Atlantic and the context within which they were produced are the focus of the paper.


1966 ◽  
Vol 44 (5) ◽  
pp. 839-849 ◽  
Author(s):  
C. Berkeley

Twenty-five species of Polychaeta recently collected off the coast of British Columbia are discussed. Most were taken in waters of considerable depth off the west coast of Vancouver Island. Sixteen are new to British Columbia. Most of these are known from farther south on the west coast of North America, but some from much shallower depths than those from which they are now recorded; two of them are new to the northeast Pacific; one is a new subspecies. The other nine have been previously known from British Columbia, but they are now recorded from much greater depths than hitherto, or in new geographical locations.


Author(s):  
J.P. Wares ◽  
A.E. Castañeda

Identification of the range boundaries and microgeographic distribution of cryptic species is greatly facilitated by the use of genetic markers. Here we characterize the geographic range overlap between two cryptic species, Chthamalus fissus and C. dalli, and show that as with other barnacle species, their distribution and abundance is probably dictated more by microhabitat characteristics and the presence of conspecifics than broader environmental gradients. We also show that C. dalli appears to be panmictic across the studied range.


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