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The geology of the Hypersthene Gabbro of Ardnamurchan Point and implications for its evolution as an upper crustal basic magma chamberDay, Simon John January 1989 (has links)
The Hypersthene Gabbro of Ardnamurchan Point is formed by an outer Marginal Border Group ( MBG ) and a younger Inner Series (IS). The MBG is a single large intrusion which corresponds to a high - melt - percentage magma chamber. The IS is dominated by numerous gabbronorite sheet intrusions which formed a large low - melt - percentage magma body. The country rocks around the MBG show polyphase metamorphism. An early (Ml) phase of high-grade metamorphiam was followed by sudden cooling and then by hydrothermal metamorphism ( M2 ), related in part to the emplacement of the IS. The sudden cooling was caused by self - propagation of tensile fracture networks containing vigorously convecting hydrothermal fluids. The fracture networks were initiated by tectonic fracturing. The fractures networks also propagated into the MBG and partly preserved the magma chamber boundary layer formed during Ml. The contact of the MBG was approximately stationary during Ml. Wall - rock melting occurred in an episodic process triggered by movement on concentric inward - dipping normal faults due to fluctuations in magma pressure. The heat flux Q(_m) in the boundary layer was approximately equal to the heat flux Qc in the adjacent wall rocks. The preservation of the end – M1 instantaneous metamorphic thermal gradient in the country rocks by the subsequent sudden cooling allows direct measurement of Q(_c) and hence of Q(_m) (8 - 40Wm(^-2)) and other parameters of the boundary layer of the MBG magma chamber. The interior of the MBG magma chamber was probably just stably stratified but cooling at the chamber walls produced density currents and slow mixing between the layers. The chamber was not well - mixed: variations in previous crustal contamination of the magmas have been preserved. The IS shows evidence for interstitial melt expulsion related to the formation of igneous lamination. Hydrothermal circulation in the IS, at up to 1000ºC, produced oxidation of the rocks and may have led to the formation of hydrous melts.
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Assembling places and persons: a tenth-century Viking boat burial from Swordle Bay on the Ardnamurchan peninsula, western ScotlandHarris, O.J.T., Cobb, H., Batey, C.E., Montgomery, Janet, Beaumont, Julia, Gray, H., Murtagh, P., Richardson, P. 08 June 2016 (has links)
Yes / A rare, intact Viking boat burial in western
Scotland contained a rich assemblage of grave
goods, providing clues to the identity and
origins of both the interred individual and
the people who gathered to create the site. The
burial evokes the mundane and the exotic,
past and present, as well as local, national
and international identities. Isotopic analysis
of the teeth hints at a possible Scandinavian
origin for the deceased, while Scottish, Irish
and Scandinavian connections are attested by
the grave goods. Weapons indicate a warrior
of high status; other objects imply connections
to daily life, cooking and work, farming
and food production. The burial site is itself
rich in symbolic associations, being close to a
Neolithic burial cairn, the stones of which may have been incorporated into the grave. / The accepted post-review manuscript here was submitted under the title: "The Viking boat burial on Ardnamurchan".
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Feminist Pedagogy: implications and practiceCroucher, Karina, Cobb, H., Casella, E. 02 1900 (has links)
No / Rosemary Joyce’s research in gender archaeology and archaeologies of the body and identity have not only impacted on our interpretations of the body and identity in the past, but have contributed vastly to our understandings of epistemologies of academic practice, particularly with relation to addressing the androcentric and hetero-normative frameworks in which the disciplines of archaeology and anthropology have traditionally operated. Furthermore, through reassessing ways of viewing, researching, and interpreting the past, Joyce and her contemporaries have changed the face of archaeological theory, method and practice, pre-empting current theoretical concepts (for instance, Ingold’s ‘meshworks’ and Hodder’s ‘entanglement’ theories as lenses for interpreting the past (and the present)) by over twenty years. This paper explores Joyce’s contribution in redressing our epistemologies, which influence our understanding of the past, and impact on archaeological research and practice. For instance, recognition of multiple narratives and the democratization of the archaeological voice have created new understandings and interpretations of our archaeological record. Taking a case study of an archaeological field school and research excavation, the Ardnamurchan Transitions Project, this paper explores how an approach grounded in feminist ways of seeing the world, and a democratization of communication, impact on student learning, both in the field and the classroom, and ultimately, in our archaeological interpretations and understanding. Crucially, this paper also highlights that our discipline has some way to go in realizing the foundations laid by Joyce and her contemporaries.
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