A case study of the time and nature of paleomagnetic resetting in a mafic complex in New England

1976 ◽  
Vol 13 (7) ◽  
pp. 898-907 ◽  
Author(s):  
L. D. Schutts ◽  
A. Brecher ◽  
P. M. Hurley ◽  
C. W. Montgomery ◽  
H. W. Krueger

It appears that a hydrothermal alteration and development of magnetite is largely responsible for a paleomagnetic resetting in a belt of mafic–intermediate rocks in eastern Massachusetts. The age of this thermal and metasomatic event is found to be about 370 m.y. by both geochronological and paleomagnetic evidence. This age does not coincide with the emplacement of plutons within the region (600 and 450 m.y.), nor with the 340 m.y. uplift and cooling shown by K–Ar ages on biotites.The age and tentative pole position obtained favour the hypothesis that an eastern region in New England and Maritime Canada comprised a single block in the Devonian that was separate from North America at that time, and fits the polar wanderpath of North Africa.

Author(s):  
Odile Moreau

This chapter explores movement and circulation across the Mediterranean and seeks to contribute to a history of proto-nationalism in the Maghrib and the Middle East at a particular moment prior to World War I. The discussion is particularly concerned with the interface of two Mediterranean spaces: the Middle East (Egypt, Ottoman Empire) and North Africa (Morocco), where the latter is viewed as a case study where resistance movements sought external allies as a way of compensating for their internal weakness. Applying methods developed by Subaltern Studies, and linking macro-historical approaches, namely of a translocal movement in the Muslim Mediterranean, it explores how the Egypt-based society, al-Ittihad al-Maghribi, through its agent, Aref Taher, used the press as an instrument for political propaganda, promoting its Pan-Islamic programme and its goal of uniting North Africa.


2009 ◽  
Vol 7 (1) ◽  
pp. 83-104 ◽  
Author(s):  
Phitsamay Uy

In the world of K–12 education, the growing numbers of dropouts are a major concern. This article examines the dropout rates of Chinese and Vietnamese high school students. Using logistic regression analysis, this article examines the influence of ethnicity, gender, and socioeconomic status (SES) on dropout rates. The distinct contribution of this analysis lies within the intraethnic comparisons within the Asian American student population and its use of longitudinal data. The results of the study support existing research that gender and SES are related to dropout rates. Moreover, an interesting interaction between ethnicity and SES exists.


2021 ◽  
Vol 139 (1) ◽  
pp. 82-97
Author(s):  
Steven Vanderputten

While foundation accounts of medieval religious institutions have been the focus of intense scholarly interest for decades, so far there has been comparatively little interest in how successive versions related to each other in the perception of medieval and early modern observers. This essay considers that question via a case study of three such narratives about the 930s creation of Bouxières Abbey, a convent of women religious in France’s eastern region of Lorraine. At the heart of its argument stands the hypothesis that these conflicting narratives of origins were allowed to coexist in the memory culture of this small convent because they related to different arguments in its identity narrative. As such, it hopes to contribute to an ill-understood aspect of foundation narratives as a literary genre and a memorial practice in religious communities, with particular attention to long-term developments.


1987 ◽  
Vol 65 (6) ◽  
pp. 1163-1179 ◽  
Author(s):  
David G. Green

Pollen diagrams from sites in southwest Nova Scotia and close to the New Brunswick – Nova Scotia border show that after retreat of the Wisconsin ice sheets, most tree taxa arrived in the extreme southwest of Nova Scotia earlier than anywhere else in the province. For most tree taxa, arrival times at sites in maritime Canada and in northeastern New England are consistent with very early dispersal of individuals along the coastal strip via the exposed coastal shelf and with their entering Nova Scotia from the southwest. These scattered pioneer populations acted as centres for major population expansions, which followed much later in some cases. Local environments, fire, and interspecies competition appear to have been more important than propagule dispersal rates as factors limiting the spread of most taxa.


2021 ◽  
Vol 141 ◽  
pp. 110766
Author(s):  
Steffi Olesi Muhanji ◽  
Clayton Barrows ◽  
Jordan Macknick ◽  
Amro M. Farid
Keyword(s):  

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