No description available.

Thesis (Ph.D.)--Aberdeen University, 2009. / Title from web page (viewed on July 14, 2009). Includes bibliographical references.

The Tertiary lavas of Northern Skye, N.W. Scotland comprise a pile of flat-lying, predominantly basaltic, volcanic flows. The lavas are the earliest products of the igneous activity on Skye, later manifestations including the gabbroic Cuillin complex and the Red Hills granites. The activity occurred from approximately 65 Ma to 50 Ma (Palaeocene to Eocene) within a continental environment. The lava pile can be divided compositionally into three magma-types, the Skye Main Lava Series (SMLS), lavas of which constitute the majority of the pile, and the less abundant Preshal Mhor (PM) and Fairy Bridge (FB). This study concerns the petrogenesis of the three magma-types. The three magma-types have a normal basaltic mineralogy; phenocrysts include olivine, plagioclase and sparse clinopyroxene; groundmasses comprise varying proportions of olivine, plagioclase, clinopyroxene, and titanomagnetite. A typical flow comprises four zones: a basal amygdaloidal layer, a massive central portion possibly showing columnar jointing, a purple rotted amygdaloidal layer, and a capping red or brown bole. The fractional crystallisation of the SMLS w#s a two-stage process initially involving the precipitation of olivine (± minor Cr-spinel), and later fractionation of olivine and plagioclase ± clinopyroxene. The majority of the lavas assimilated some lower crustal Lewisian granulite en route to the surface. The most basic lavas are the most contaminated. Major and trace element modelling suggests that the SMLS magmas were generated by 15 % melting, at an above-average mantle potential temperature, within the spinel-garnet transition zone at a depth of - 100 km. The magmas subsequently last equilibrated with mantle host rocks at 15 kb (- 45 km).

No description available.

The concept of talus slopes co-evolving with vegetation cover is investigated on the Trotternish Ridge, Isle of Skye, Scotland.  This uses several lines of contemporary and palaeoenvironmental evidence.  Through a replicated set of grazing enclosures, the composition and structure of present-day vegetation is linked to contemporary grazing regimes and slope erosion processes.  Vegetation history is reconstructed from the fossil pollen content of organic palaeosols intercalated within the talus deposits.  A new method using Long Chain Alcohols is used to support the interpretation of the fossil pollen records.  Geomorphological development is revealed through analysis of talus stratigraphy and the sedimentary deposits immediately below the slopes.  These lines of evidence are combined to construct a conceptual model for talus co-evolution on the Trotternish Ridge.  Talus development began as the climate warmed from around 17.5k cal yrs BP, and the glaciers of the last Ice Age retreated.  Slopes initially comprised rockfall debris, with a sparse cover of vegetation having little or no effect on slope processes.  Heathland and grassland vegetation, evidenced by the organic palaeosols, was intermittently present on the talus slope surfaces from 7.7-7.6k cal yr BP until approximately 0.6-0.5k cal yr BP.  This vegetation cover limited physical and hydrological surface processes, enabling the upper part of the talus slopes to over-steepen.  Evidence of increased frequency of organic palaeosol burial, and increased rates of sediment deposition after around 2.0k cal yr BP, both indicate greater debris flow and other erosional activity in the late Holocene.  This is attributed to both increased incidence of intense rainfall events and much higher levels of grazing associated with the introduction of cattle, sheep and rabbits.  Contemporary evidence shows that heavy grazing changes the vegetation composition and structure, and increases susceptibility to erosion.  Talus co-evolution on the Trotternish Ridge may be similar to that at other British and Faroese sites which share the same basaltic geology.

No description available.

No description available.

L'intervalle Oxfordien supérieur/Kimméridgien inférieur (Jurassique supérieur, ~156 Ma) de la région de Lorraine/Champagne a fait l'objet d'une étude pluridisciplinaire en vue d'améliorer les corrélations entre les provinces boréales et téthysiennes. Les associations de fossiles (foraminifères, algues, brachiopodes, phytoclastes etc.) ainsi que les données géochimiques de l'Est du Bassin parisien révèlent un changement des conditions physico-chimiques de l'eau de la plate-forme lagonaire tropicale (dysoxie, diminution de température). Ces changements vont entraîner la quasi-disparition des organismes et empêcher la production de carbonates. Le refroidissement s'explique localement par le renforcement de courants apportant des eaux boréales fraîches envahissant la plate-forme. Des corrélations entre les dépôts de l'Est et ceux du Sud du Bassin parisien (Berry) ont permis d'améliorer le cadre chronologique de l'Est du Bassin parisien très pauvre en ammonites. La comparaison des cadres séquentiels permet de placer le maximum de régression d'un cycle eustatique de 3ème ordre reconnu et caractérisé par ailleurs (limite des zones à Planula et Platynota).Une succession située sur l'Ile de Skye a été proposée en tant que potentiel stratotype pour la limite Oxfordien/Kimméridgien. L'étude de la coupe de Flodigarry avait pour objectif de tenter de comparer cette succession subboréale à des dépôts subméditerranéens à travers différents marqueurs. L'analyse de la matière organique soluble a révélé des biomolécules très bien préservées, parmi les plus vieilles identifiées au monde / Isotopic ([delta]18O and [delta]13C) and elementary geochemical data as well as macro and microfossil associations, show a chemical change in the water of the lagoonal platform in the eastern Paris Basin, during the Late Oxfordian/Early Kimmeridgian interval (Upper Jurassic, ~156 Ma). Gradually, the shallow tropical environments dominated by biomineralization of carbonates became confined, dysoxic and colder. Correlations between depositional environments with similar facies in the Southern and in the Eastern Paris Basin helped to improve the biostratigraphic frameworks. Comparisons between the sequential frames deduced from the palaeoenvironmental evolution of Berry and Lorraine places the maximum regression of a 3rd order cycle at the Planula and Platynota ammonite zones boundary. Recently, the Flodigarry Shale Member, a shaly succession located on the Isle of Skye (Scotland), has been proposed as a possible GSSP (Global Stratotype Section and Point) to define the Oxfordian/Kimmeridgian boundary. The section was studied in order to compare this subboreal series to submediterranean deposits (Paris Basin) by means of other markers such as organic molecular contents. It revealed very well preserved biomolecules, among the oldest identified in the world. This thesis provides new palaeontological, geochemical and stratigraphic data in both Jurassic palaeobiogeographic realms. Well documented sections of the Eastern Paris Basin are now available for this interval. Such local observations, integrated in a multidisciplinary approach, should strengthen the correlations across these realms and precise the global components of the crisis of the carbonate production near the O/K boundary

Orange, turqoise, apricot, brown, dirt, soil, water, sky and sulfur were my first bricks while building this collection. Ifound them in the pictures I took in Yellowstone, in the summer of 2010. While being in Yellowstone I thought aboutthe artist Georgia O´Keffee, an artist I’ve long liked. The landscape of Yellowstone reminded me about her landscapepaintings so I researched her life and work. She was a genuine feminist without saying it, she just lived like she wasequal to other women and men. This led me to a book about forgotten goddesses where I found references todrapings that I’ve developed and interspersed with flat pattern cutting. One of my key objectives, in this project andother projects, has been to push the limits of menswear towards feminine elements. I believe that there’s a certainreason why a woman can wear a suit without anyone looking twice but it’s very striking if a man wears a dress. Inthis collection I’ve looked into various reasons for this and I aim to let men dress the same way as women do aswell as the other way around. / Program: Modedesignutbildningen

No description available.