Late Triassic megaspores from the Amery Group,Prince Charles Mountains,East Antarctica

Cantrill, D. J., & Drinnan, A. N., 1994:03:28. Late Triassic megaspores from the Amery Group, Prince Charles Mountains, East Antarctica. Alcheringa 18, 71–78. ISSN 0311-5518.

Megaspores referable to the genera Cabochonicus Batten & Ferguson 1987 and Minerisporites Potonié 1956 are a common component of the palaeoflora recovered from the Jetty Member within the Flagstone Bench Formation of the Amery Group. The known ranges of these two genera, in conjunction with the macrofloral remains, suggest a Late Triassic age. Two new species, Cabochonicus sinuosus and Minerisporites triangulatus, are described. Scanning electron microscopic examination of the spores indicates that standard palynological treatment of megaspores can result in sculptural degradation, possibly leading to incorrect generic assignment.     

Global multipolarity,European security and implications for UK grand strategy: back to the future,once again

The international system is returning to multipolarity—a situation of multiple Great Powers—drawing the post‐Cold War ‘unipolar moment’ of comprehensive US political, economic and military dominance to an end. The rise of new Great Powers, namely the ‘BRICs’—Brazil, Russia, India, and most importantly, China—and the return of multipolarity at the global level in turn carries security implications for western Europe. While peaceful political relations within the European Union have attained a remarkable level of strategic, institutional and normative embeddedness, there are five factors associated with a return of Great Power competition in the wider world that may negatively impact on the western European strategic environment: the resurgence of an increasingly belligerent Russia; the erosion of the US military commitment to Europe; the risk of international military crises with the potential to embroil European states; the elevated incentive for states to acquire nuclear weapons; and the vulnerability of economically vital European sea lines and supply chains. These five factors must, in turn, be reflected in European states’ strategic behaviour. In particular, for the United Kingdom—one of western Europe's two principal military powers, and its only insular (offshore) power—the return of Great Power competition at the global level suggests that a return to offshore balancing would be a more appropriate choice than an ongoing commitment to direct military interventions of the kind that have characterized post‐2001 British strategy.     

Unconventional Gas in Australia: Towards a Legal Geography

Recent commentary on future research directions for legal geography highlights the need for studies that are historically grounded and focused on human–environment interactions in rural settings. As a current, controversial land use in Australia, unconventional gas (UG) development provides an ideal lens through which researchers can investigate these themes. Utilising emerging international literature and current Australian examples, this paper surveys major trends in the Australian literature relating to UG, before exploring some of the ways in which Australian legal geographers might contribute constructively to community debates around this resource. Seeking to encourage further analysis, this paper contributes to this developing literature by focusing on two key areas: the various legal actors involved in UG development in Australia (including their regulatory choices, spatial interpretations, expertise, and influence) and the implications for legal geography where attempts are made to establish ‘social licence’ through contractual arrangements between industry and individual landholders. This article also delves into the place of Indigenous Australians in relation to UG extraction and the questions this resource raises about land use conflicts in Australia more generally – offering suggestions for comparative international studies and further critique at the domestic level.     

The security of Africans beyond borders: migration,remittances and London's transnational entrepreneurs

This article provides an overview of selected aspects of how the economic security of growing numbers of Africans is linked to international migration. It first examines the emergence since 2005 of a new international policy discourse emphasizing the positive economic benefits of migration through remittance flows, the transfer of ideas and inward investment by migrants. The article outlines European policy responses to the recent upsurge in illegal Africa migration across the Mediterranean and examines the reaction of African governments and the Africa Union to increased migration and the enhanced dependence of African economies on remittance flows. The final section highlights the way in which the accelerated settlement of Africans in the UK prefigures longer term changes in the UK's relationship with Africa.     

Interpreting Urban Food Supply and Distribution Systems from Faunal Assemblages: An Example from Colonial Massachusetts

Animal bone assemblages from four historical sites in eastern Massachusetts are analysed in a comparative framework to interpret aspects of urban food systems. Characteristics of the urban environment and the nature of food supply and exchange systems are interpreted from taxonomic representation, body part representation, butchery patterns, and age and seasonal slaughtering patterns. These analyses show that specialized husbandry to supply urban markets was limited during the seventeenth and eighteenth centuries, and that many aspects of urban food distribution systems followed traditional rural patterns. A model that explores the relation between patterning of bone collections and characteristics of urban areas is applicable to other studies of urban assemblages. © 1997 by John Wiley & Sons, Ltd.     

MYTHS AND MEANINGS OF IMMIGRATION AND THE METROPOLIS

A number of trends in recent immigration to Canada are discussed: the scale of contemporary movement; the transformation of national origins over the past generation; the diversity of entry classes and the lack of any singular immigrant condition; the remarkable contraction of immigrant destinations to a few large cities; the contribution of immigration to population growth and housing demand in these metropolitan areas; and the distinctive geography of the various entry classes, with higher-status arrivals disproportionately located in Vancouver. The remainder of the paper considers and rejects two common myths in the discussion of immigration: first, the myth of an immigrant underclass, and second, the myth of an immigrant overclass. Using research from Vancouver associated with the Metropolis Project, the first myth is challenged from an analysis of Census data that emphasizes the social context of immigrant life and upward mobility; the second myth is shaken by a qualitative methodology that reveals the unexpectedly fragile experience of a number of business immigrants. Certaines tendances relatives à l'immigration récente au Canada sont examinées: l'envergure des déplacements actuels, les changements dans l'origine nationale des immigrants au cours de la dernière génération, la diversité des catégories d'immigrants admis et, par conséquent, l'absence d'une seule condition pour tous, le fait que les immigrants choisissent essentiellement de s'établir dans quelques grandes villes, la croissance de la population et la demande en logement attribuables aux immigrants dans ces régions métropolitaines, et les choix géographiques distincts des immigrants selon leur catégorie à l'admission, comme c'est le cas de Vancouver, qui accueille un nombre disproportionné d'arrivants de statut élevé. Dans le reste de l'article, les résultats d'études effectuées dans le cadre du Projet Métropole permettent d'examiner puis de réfuter deux mythes communément associés à l'immigration au Canada: l'existence d'un sous-prolétariat et celle d'une classe dominante d'immigrants urbains. D'abord, l'existence d'un sous-prolétariat est rejetée suite à l'analyse de données tirées du recensement concernant le contexte social entourant les immigrants et la mobilité sociale ascendante de la plupart des nouveaux arrivants. Ensuite, une méthode qualitative met en lumière une découverte surprenante: la fragilité de l'expérience de la prétendue classe dominante – les immigrants qui travaillent dans le monde des affaires.     

MORPHOSÉDIMENTOLOGIE D'UNE PLATE-FORME INTERTIDALE ROCHEUSE EN ZONE TEMPÉRÉE FROIDE, ÎLE D'ANTICOSTI, QUÉBEC

La géomorphologie côtière au sud-ouest de l'île d'Anticosti est dominée par une large plate-forme intertidale taillée dans des calcaires. Des flèches transversales, apparentées aux queues-de-comète mais en sens inverse par rapport à la côte, sont les formes d'accumulation les plus remarquables résultant de la dynamique littorale. Perpendiculaires au rivage, ces flèches prennent naissance à partir de ressauts rocheux, dégagés par érosion différentielle de la plate-forme littorale, d'où l'appellation proposée de « flèche transversale de bordure de plate-forme ». Les matériaux d'accumulation, très grossiers, proviennent en majeure partie de roches calcaires. L'évolution de ces flèches est soumise à l'apport de matériaux provenant du substrat rocheux de la plateforme. L'analyse des indices d'émoussé et de la granulo-métrie des matériaux révèle, qu'à la limite inférieure de la plate-forme, les sédiments sont très grossiers et nettement anguleux. La progression des sédiments vers le rivage par les courants de marée et de dérive littorale, issus de la réfraction et de la diffraction des vagues, provoque leur désagrégation en sédiments plus fins, accentuant par le fait même leur émoussé. L'analyse sédimentologique de segments de plage, de cordons littoraux et de flèches transversales révèle le rôle prépondérant de la plate-forme intertidale en tant que source d'alimentation en matériaux. On confirme l'hypothèse selon laquelle les sédiments, à dominance de galets et de graviers, proviendraient de la désagrégation des ressauts structuraux de la plate-forme intertidale par gélifraction et seraient transportés par les courants de marée et de dérive vers le rivage. Par centre, aucune évidence de transport vers la mer n'a été clairement reconnue. La dynamique d'évolution littorale s'avère donc conditionnée à la fois par la présence de la plate-forme qui contrôle les processus hydrodynamiques et par la disponibilité en matériaux issus de sa destruction. Bien que les flèches transversales soient très bien développées, le taux d'érosion apparemment faible de la plate-forme, ainsi que la stabilité des autres formes d'accumulation sur la période de 50 ans de l'analyse par la photointerprétation multidate, tendent à indiquer un schéma d'évolution littorale lente ou tout au moins dèpassant cette récurrence de 50 ans. Intertidal rock-platform is the dominant coastal landform of southwest Anticosti Island and is also the main control of coastal dynamics. Transverse bars are the most remarkable sediment bodies being formed at the surface of this limestone rock-platform. The bars extend on the landward side of small bedrock knolls that were produced by differential erosion of the shore platform, and so we propose the name of ‘platform edge transverse bar’. Bar sediments consist almost exclusively of limestone cobbles that are derived from the surrounding platform. Pebble roundness and grain-size trends indicate that sediments are coarser and very angular at the proximal end of the bars, near the outer limit of the platform; clasts become progressively better rounded and finer-grained as they are transported shoreward by waves and longshore currents. Whether at high or low tide, wave attenuation takes place mainly at the outer limit of the platform; this provides an explanation for the apparently low rate of shoreline erosion, and it also suggests that only severe storms are likely to displace the coarse intertidal sediments and to modify the main coastal landforms. However, the presence of sediments on the platform indicates that some erosion is taking place, mainly by frost action. The rocky coastal platform with its low erosion rate is thus a highly stable landform, and, as a result, coastline evolution seems to be slow in the 50 years period of an airphoto analysis.