Surface controls on the characteristics of natural CO2 seeps: implications for engineered CO2 stores

CO₂ injected into rock formations for deep geological storage must not leak to surface, since this would be economically and environmentally unfavourable, and could present a human health hazard. In Italy natural CO₂ degassing to the surface via seeps is widespread, providing an insight into the various styles of subsurface ‘plumbing’ as well as surface expression of CO₂ fluids. Here we investigate surface controls on the distribution of CO₂ seep characteristics (type, flux and temperature) using a large geographical and historical data set. When the locations of documented seeps are compared to a synthetic statistically random data set, we find that the nature of the CO₂ seeps is most strongly governed by the flow properties of the outcropping rocks, and local topography. Where low‐permeability rocks outcrop, numerous dry seeps occur and have a range of fluxes. Aqueous fluid flow will be limited in these low‐permeability rocks, and so relative permeability effects may enable preferential CO₂ flow. CO₂ vents typically occur along faults in rocks that are located above the water table or are low permeability. Diffuse seeps develop where CO₂ (laterally supplied by these faults) emerges from the vadose zone and where CO₂ degassing from groundwater follows a different flow path due to flow differences for water and CO₂ gas. Bubbling water seeps (characterized by water bubbling with CO₂) arise where CO₂ supply enters the phreatic zone or an aquifer. CO₂‐rich springs often emerge where valleys erode into CO₂ aquifers, and these are typically high flux seeps. Seep type is known to influence human health risk at CO₂ seeps in Italy, as well as the topography surrounding the seep which affects the rate of gas dispersion by wind. Identifying the physical controls on potential seep locations and seep type above engineered CO₂ storage operations is therefore crucial to targeted site monitoring strategy and risk assessment. The surface geology and topography above a CO₂ store must therefore be characterized in order to design the most effective monitoring strategy.     

Politics and Eschatology: Reassessing the Appeal of the “Jewish Indian” Theory in England and New England in the 1650s

This article examines the “Jewish Indian” theory — which claimed that American Indians were the ten lost tribes of Israel — in 1650s England and New England. The theory found support in England while failing in New England. This difference in reception can be explained by considering its ecclesiological, political, and eschatological implications. Biblical commentators in both England and New England held to a form of “Judeo‐Centric” eschatology, which looked for a sudden, miraculous conversion of the Jews and their eventual superiority to Gentile believers. Such beliefs undermined crucial elements of New England ecclesiology when applied to Native Americans. Conversely, the New England Company used the theory in its publications as a fund‐raising tool in England. These publications impacted upon debates on Jewish readmission to England in the mid‐1650s, with New England missionary models suggested as a way of evangelising Jews. This article therefore argues for the importance of understanding eschatological beliefs in local contexts, while demonstrating the way in which such beliefs can be maintained and reoriented in the face of apparent disconfirmation.     

Macrofossil evidence of early sporophyte stages of a new genus of water fern Tecaropteris (Ceratopteridoideae: Pteridaceae) from the Paleogene Redbank Plains Formation,southeast Queensland,Australia

Rozefelds, A.C., Dettmann, M.E., Clifford, H.T. & Lewis, D., August 2015. Macrofossil evidence of early sporophyte stages of a new genus of water fern Tecaropteris (Ceratopteridoideae: Pteridaceae) from the Paleogene Redbank Plains Formation, southeast Queensland, Australia. Alcheringa 39,. ISSN 0311-5518.

Water fern foliage is described from the Paleogene Redbank Plains Formation at Dinmore in southeast Queensland. The material, which is based upon leaf impressions, records early sporophyte growth stages. The specimens occur at discrete levels in clay pits at Dinmore, and the different leaf stages present suggest that they represent colonies of young submerged plants, mats of floating leaves, or a mixed assemblage of both. The leaf material closely matches the range of variation evident in young sporophytes of Ceratopteris Brongn., but in the complete absence of Cenozoic fossils of the spore genus Magnastriatites Germeraad, Hopping & Muller emend. Dettmann & Clifford from mainland Australia, which are the fossil spores of this genus, it is referred to a new genus, Tecaropteris. The record of ceratopterid-like ferns adds significantly to our limited knowledge of Cenozoic freshwater plants from Australia. The geoheritage significance of sites, such as Dinmore, is discussed briefly.

Andrew C. Rozefelds [andrew.rozefelds@qm.qld.gov.au], Queensland Museum GPO Box 3300, South Brisbane, 4101, Queensland, Australia and School of Earth Sciences, University of Queensland, St Lucia, 4072, Queensland, Australia; Mary Dettmann [mary.dettmann@qm.qld.gov.au], H. Trevor Clifford [trevor.clifford@qm.qld.gov.au] and Debra Lewis [debra.lewis@qm.qld.gov.au], Queensland Museum, GPO Box 3300, South Brisbane, 4101, Queensland, Australia.     

Monarchism,an Emerging Canadian Identity,and the 1866 British North American Trade Mission to the West Indies and Brazil

In 1865, the colonies of eastern British North America created a joint commission to investigate the possibility of reciprocal trade agreements with other parts of the Western hemisphere. In early 1866, the commissioners visited the West Indies and the Empire of Brazil, where they met officials and business leaders. No actual tariff agreements resulted from the commissioners’ travels, the main concrete result of the 1866 trade mission being the establishment of a direct steamship service between Canada and the West Indies. The study of contemporary discussions of the trade mission deepens our understanding of the history of relations between the British West Indies and British North America in the aftermath of emancipation and the end of the ‘Old Colonial System’. Moreover, these discussions reveal different elements of an emerging Canadian identity. Discourse of Britishness influenced the 1866 trade mission, but so did a sense of affinity linking Canada to the other monarchical territories in the Western hemisphere, such as the Empire of Brazil. For their part, some contemporaries in the West Indies welcomed the Canadian trade initiative because they wished for a counterweight to the growing influence of the United States in the region. The article also presents new information about British policy towards Latin America, particularly Mexico and Brazil, as well as British commercial diplomacy more generally. The article is based on materials in archives in the United Kingdom and Canada as well as a range of printed primary sources.     

The Awkward Squad: Arts Graduates from British Tropical Africa Before 1940

ABSTRACT

Before the Second World War, most Africans from British Tropical Africa who studied abroad were seeking qualifications in three professions: law, medicine and the Church. In all these, they could be reasonably sure of employment on their return. True, government employment was problematic, but law and medicine did offer the alternative – often more lucrative – of private practice. Much more threatening to colonial authority were arts students: those who read philosophy, literature, politics or sociology. This article focuses on several men who graduated in Britain or the USA: Kobina Sekyi, J.B. Danquah, James Aggrey, Bankole Awoonor-Renner (Gold Coast); Eyo Ita, Nathaniel Fadipe, Nnamdi Azikiwe – and his (mostly Igbo) protégés (Nigeria); Hosea Nyabongo, Balamu Mukasa, Ernest Kalibala (Uganda); Peter Koinange (Kenya). It concludes by surveying the career of Nicholas Ballanta-Taylor (Sierra Leone), who studied music in New York and in 1927 won a fellowship from the Guggenheim Foundation for musicological research in Africa. Of these pioneer African Africanists, four wrote successful doctoral theses, Azikiwe published an academic study. Aggrey and Fadipe died prematurely. Danquah applied his intellect to essentially non-academic pursuits. Ballanta, worked as a practical musician in the 1930s, but his African research remains virtually unpublished.     

Clowning and tragic clowning: Miguel de Unamuno as a funny writer

ABSTRACT

The present study considers the role and function that humor has in Unamuno's intellectual and literary universe. It traces Unamuno's attitude toward humor to his reading of the Spanish character in En torno al casticismo (1895) and to his dialogue with the figure of Don Quixote, as found in Vida de Don Quijote y Sancho (1905) and Del sentimiento trágico de la vida (1912). Finally, it looks at the theory of humor offered in the novel Niebla (1914) and also at the role that humor played in Unamuno's later political writings, especially those of exile (1924–1930).     

Hyper or hypo-masculine? Re-conceptualizing ‘hyper-masculinity’ through Seattle’s gay,leather community

This article offers a critique of the concept of hyper-masculinity and a more nuanced, place contingent, critical way to think about masculinity. I use the concept of hyper-masculinity to highlight a conceptual problem between essentialist and de-essentialized notions of gender. Constructionist notions of masculinity (and gender) do not escape the essentialist problem; however, by critiquing and offering a placed conceptualization of hyper-masculinity based on Seattle’s gay leather community, I push the boundaries of masculinity and gender to arrive at a more nuanced, embodied, place-based and contingent understanding of hyper-masculinity thereby side-stepping debates that essentialist/constructionist. Through participant-observations and ethnographic interviews with men who practice hyper-masculinity within the gay leather community in Seattle, USA, I interrogate hyper-masculinity within the community to demonstrate how it reinforces and subverts heterosexual gender roles and homonormativity.