scholarly journals A Reciew on F., M.ANDERSON'S Upper Cretaceous Ammonites of the West Coast of North America

1958 ◽  
Vol 64 (759) ◽  
pp. 650-653 ◽  
Author(s):  
Tatsuro MATSUMOTO
Keyword(s):  
North America ◽  
West Coast ◽  
Upper Cretaceous ◽  
The West

The Lower Jurassic phosphorites of southeastern British Columbia and terrane accretion to western North America

1989 ◽  
Vol 26 (8) ◽  
pp. 1612-1616 ◽  
Author(s):  
T. P. Poulton ◽  
J. D. Aitken
Keyword(s):  
British Columbia ◽  
North America ◽  
Oceanic Crust ◽  
West Coast ◽  
Cold Water ◽  
Lower Jurassic ◽  
Depositional Model ◽  
Western North America ◽  
The West ◽  
Terrane Accretion

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.

scholarly journals A taxonomic review of pterotracheoid gastropod mollusks from California Current waters off the west coast of North America

Zoosymposia ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 147-150
Author(s):  
ROGER R. SEAPY
Keyword(s):  
North America ◽  
West Coast ◽  
Morphological Characteristics ◽  
California Current ◽  
Single Species ◽  
The West ◽  
Taxonomic Review ◽  
Gastropod Mollusks ◽  
Taxonomic Characterization

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.

scholarly journals The Timeless African and the Versatile Indian in Seventeenth-Century Travelogues

2005 ◽  
Vol 14 (1) ◽  
pp. 23-44
Author(s):  
Michel Duquet
Keyword(s):  
Seventeenth Century ◽  
North America ◽  
American Indian ◽  
West Coast ◽  
Tropical Environment ◽  
The West ◽  
The North ◽  
Native Populations ◽  
French And English ◽  
North American Indian

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.

RECORDS OF SOME SPECIES OF POLYCHAETA NEW TO BRITISH COLUMBIA AND OF EXTENSIONS IN DISTRIBUTION OF SOME OTHERS

1966 ◽  
Vol 44 (5) ◽  
pp. 839-849 ◽  
Author(s):  
C. Berkeley
Keyword(s):  
British Columbia ◽  
North America ◽  
West Coast ◽  
Vancouver Island ◽  
The Other ◽  
The West ◽  
New Subspecies ◽  
Northeast Pacific ◽  
Considerable Depth ◽  
Geographical Locations

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.

Geographic range in Chthamalus along the west coast of North America

2005 ◽  
Vol 85 (2) ◽  
pp. 327-331 ◽  
Author(s):  
J.P. Wares ◽  
A.E. Castañeda
Keyword(s):  
North America ◽  
Cryptic Species ◽  
Genetic Markers ◽  
West Coast ◽  
Environmental Gradients ◽  
Geographic Range ◽  
The West ◽  
Barnacle Species ◽  
Range Overlap

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.

The pP phase generated in water covered areas

1965 ◽  
Vol 55 (4) ◽  
pp. 721-726
Author(s):  
D. H. Shurbet
Keyword(s):  
North America ◽  
Crustal Structure ◽  
West Coast ◽  
Ocean Bottom ◽  
The West ◽  
Coefficient Of Reflection ◽  
Uppermost Layer ◽  
Epicenter Location

abstract The appearance of the pP phase, on seismograms, is strongly affected by the crustal structure in the vicinity of the epicenter. A recognizable pP phase is generated near the west coast of North America when the uppermost layer is water of sufficient depth. The generation of this pP is also affected by ocean bottom conditions. The bottom must probably be flat and the coefficient of reflection between the water and the bottom must be high. This pP phase may be useful in epicenter location and in crustal studies.

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